Tb42 duel fuel carby issues

[bohall]

Gday i recently bought a 88 gq tb42 carby fed duel fuel lwb for a nice price. Just lately i noticed it stall on both gas and fuel . Could this be flooding or in need of a tune ? Im able to rev to about 4000rpm before it seems to sputter not sure about lpg systems and dont know where to look .

[Woof]

Hey mate, slip over here http://www.nissanpatrol.com.au/forums/forumdisplay.php?2-Introductions and post up an introduction, it is something we like all new members to do before asking for assistance so we can welcome you, that way everyone gets a nice warm fuzzy feeling

[Clunk]

I know nothing of dual systems apart from they seem to be a pain in the arse....... there's a few threads on here that might help you out, or gove you some ideas

[garett]

check that its not duel fuelling. test lamp at solenoid if it lights up while ur on petrol you got a electrical problem
next thing to check is air leaks on the manifold to the mixer. spark timing and advance vac/mechanical not sure which or both

[dom14]

Read previous threads by me. I had these issues for years and fair bit of it is documented and fixed with the help of forum gurus here.

[Bigcol]

well mate, what sort of Gas system is it?
is it a Vapour ring
60227
Sprint type
60228
or the old Plate type that fits under the carby?????

your mixer
is it an Impco type,
60229
OMVL
60230
or a Vialle
60231

none of those pic's will be what you have, just using them to illustrate the variety of types available

my first piece of advice would be

get yourself a crimping machine, a whole load of new plugs and go around the WHOLE lot, and replace all of the crimped joiners and plugs - over time they stretch and get dirt and such into the joins and dont work 100%

2nd pice of advice
get it in for a Gas service
(I used to empty my petrol tank, and take it in for a service - if they charge you for petrol or ring and tell you you have no petrol, that means they know diddly squat about the Gas and will not do it properly)
tell them thanks, but you suck, so I will take it elsewhere
if you take it to get the Gas tuned - as you will use that more often - AND they do it properly - you are on a winner

if they know what they are doing
- you will get the correct type of plugs
- you should get the correct leads you need
- they should tune it to how you want it
- economy - can get 600Kms out of an 80L tank, but you will never get over 60km/p/h driving
- power - get maybe 250 - 350 out of a 80L tank, but with speed you will also get close to 140km/p/h - if it was legal................

then let us know how you get on..............

[Bigcol]

you also dont say if you have electronic ignition
or
if you have extended the rotor button on yours

[bohall]

Im not sure about the ignition system and gas ill have a further look ill have a look 2morro i do have an impco mixer type for the gas

[Bigcol]

just asking as, with the electronic ignition, it gives a better spark when required - good gear
I ask about what type of system,
as the Gas mixer is sometimes a real pain in the ar$e if its playing up
the best I have found (as in most trouble free - ) is the Sprint type
the Vapour ring ones are a real pain to sort depending on the air filter on top
the plate ones that go under the carby - same as the Vapour ring, but underneath - are same - a pain to sort

I've had 2 Patrols with Petrol/Gas
MK with L28 and Vapour ring
GQ with TB42 and Sprint type

like I said, first port of call is to go around and replace / repair all of the little plugs on ALL the relays and such for the Gas system

1 step at a time

[Bigcol]

Im not sure about the ignition system and gas ill have a further look ill have a look 2morro i do have an impco mixer type for the gas

what I would suggest, is get the numbers off the Impco Converter and start fact finding on Google
can you get a kit to re-build it - or is it a throw away type and get a new one
is it the right one for my 4.2L 6 cylinder -( have heard of a few that were for the wrong size engine)

it may just be old and dirty and need a cleanup

[dom14]

I know nothing of dual systems apart from they seem to be a pain in the arse....... there's a few threads on here that might help you out, or gove you some ideas

Yes, absolutely they are when it come to tuning and timing, especially if it's carby.
You can find the happy medium of tuning for both petrol and LPG, then suddenly the weather in Melbourne changes within half an hour and the vehicle ignition system decided to crap itself and run like crap, either on petrol or LPG.
I've been considering putting a dual curve unit to auto adjust the ignition curve for both fuel types, then with the time and money I spend on it, I might as well spend tad more and put in an EFI dongle from a Skyline or a VL commodore.(Mine is an RB40 with carby). I might still go ahead and install a dual curve ignition adjusting unit. But, till then it will be a PITA to tune the engine to work nicely on both fuels, 'cos I have to constantly fiddle with tuning, be it ignition timing or carby adjustments.
I even think, TB42 carby is much more PITA than RB30 carby. Such a big engine should never have come with a carby.

[dom14]

Im not sure about the ignition system and gas ill have a further look ill have a look 2morro i do have an impco mixer type for the gas

If the mixer on the top of the carby is Impco, then you should have an Impco LPG converter as well.
Apparently, both TB42 carby and RB30 carby use the same converter.(Correct me if I'm wrong).
I always wondered whether that's the right setup. Two engines behave differently due to different sizes, although they both use the same carby with minor tweaks.

[dom14]

what I would suggest, is get the numbers off the Impco Converter and start fact finding on Google
can you get a kit to re-build it - or is it a throw away type and get a new one
is it the right one for my 4.2L 6 cylinder -( have heard of a few that were for the wrong size engine)

it may just be old and dirty and need a cleanup

Hey BigCol, you signature says TD42 Diesel Gas. What does that mean mate??!!

[dom14]

Gday i recently bought a 88 gq tb42 carby fed duel fuel lwb for a nice price. Just lately i noticed it stall on both gas and fuel . Could this be flooding or in need of a tune ? Im able to rev to about 4000rpm before it seems to sputter not sure about lpg systems and dont know where to look .

Follow BigCol's directions above. Most of the dual fuel issues are electrical, when it comes to the LPG side of it. Starting from timing to ignition leads, spark plugs, wires & connectors, then to LPG mixer, converter and the carby. The dizzy needs attention as well. Since I opened up and cleaned the interior of the dizzy, mine seem to be going lot better. In your case, the dizzy has mechanical breaker points, so it may need some cleaning, adjustment, etc.

Oh,yeah, as Garett mentioned above, vacuum leaks are real PITA.
LPG is more sensitive to vacuum leaks. Grab a WD40 and spray into the vacuum joints, carby joints, etc while the engine is idling and revving using the carby throttle under bonnet. When you hear changes in engine running, while spraying at certain spots, you know where the problem is.

If the LPG converter has been there without any service on it since the beginning of time, you can reasonably assume it got gunk built up inside. If it's the Impco model L converter, a new one is around $200+, used one from a wrecker around $70 or a rebuild kit from fleabay is around $80. In my case, I went down the path of getting a used one from a wrecker to isolate the problems in mine.

[Bigcol]

If the mixer on the top of the carby is Impco, then you should have an Impco LPG converter as well.
Apparently, both TB42 carby and RB30 carby use the same converter.(Correct me if I'm wrong).
I always wondered whether that's the right setup. Two engines behave differently due to different sizes, although they both use the same carby with minor tweaks.

wrong

depending who fitted it
what system they were using
and what parts were available

my L28 had the Vapour ring, and a Vialle converter - which I changed to an Impco converter
my TB42 had an Impco Converter and Sprint mixer - which I changed to a OMVL Converter

[Bigcol]

Hey BigCol, you signature says TD42 Diesel Gas. What does that mean mate??!!
it means my TD42 (1999 GU 4.2 diesel Naturally aspirated) had the Turbo and Intercooler off a 2006 TD42Ti (TD42 Turbo intercooled) fitted
but
it also has LPG Vapour system for more grunt

[Bigcol]

bohall, I could give you the setting I had my GQ on - but it would do you no good, unless yours was set up the same as mine................
and I spent a lot of time and a lot of money on mine
electronic ignition
modified distributor
port and polished head
inlet and exhaust ports machine matched to the manifold and extractors
and other bits and pieces

I could freely rev to over 4500rpm
at Wanneroo raceway best I could get (dont forget a GQ is not light) was 155km/p/h on gas
I could freely spin the rear wheels on a dry bitumen road - or car parks as was the want with 33's on, and even better when I went back to 11R's (32")
I had mine tuned for Race Performance on Gas (as it spent 95% of its time running on Gas )
it sucked dogs balls towing - fuel economy was real crap when towing, but would humm along at 100 without a problem - as long as there was no hills

[Bigcol]

Yes, absolutely they are when it come to tuning and timing, especially if it's carby.
You can find the happy medium of tuning for both petrol and LPG, then suddenly the weather in Melbourne changes within half an hour and the vehicle ignition system decided to crap itself and run like crap, either on petrol or LPG.
I've been considering putting a dual curve unit to auto adjust the ignition curve for both fuel types, then with the time and money I spend on it, I might as well spend tad more and put in an EFI dongle from a Skyline or a VL commodore.(Mine is an RB40 with carby). I might still go ahead and install a dual curve ignition adjusting unit. But, till then it will be a PITA to tune the engine to work nicely on both fuels, 'cos I have to constantly fiddle with tuning, be it ignition timing or carby adjustments.
I even think, TB42 carby is much more PITA than RB30 carby. Such a big engine should never have come with a carby.

I did try an Automag for awhile
60236
60237

worked alright on Gas - shyte house on petrol
worked alright on petrol - shyte house on gas

[dom14]

Hey BigCol,
I'm just wondering mate, I'm not too sure about LPG vapour ring system.
Is the combination of Impco 300A mixer and Impco model L converter fall under vapour ring system?!
Impco 300A mixer fits on top of the carby, and under the air filter.

[dom14]

I did try an Automag for awhile
60236
60237

worked alright on Gas - shyte house on petrol
worked alright on petrol - shyte house on gas

Is that an electronic ignition dizzy unit?
Where do you get dizzy unit?
Stock RB30 dizzy is electronic.
You can have it tuned either for LPG or Petrol, not both.
AFAIK, the only way for a non EFI system to adjust the ignition advance curve for both fuels is to install an ignition timing advance unit.
http://www.acl.com.au/web/acl00056.nsf/0/359683e8a538a3e64a2566c0007bb33e?OpenDocument
http://www.aeb.it/Products/Products/CatID/8/Timing_advance_processors

[dom14]

bohall, I could give you the setting I had my GQ on - but it would do you no good, unless yours was set up the same as mine................
and I spent a lot of time and a lot of money on mine
electronic ignition
modified distributor
port and polished head
inlet and exhaust ports machine matched to the manifold and extractors
and other bits and pieces

I could freely rev to over 4500rpm
at Wanneroo raceway best I could get (dont forget a GQ is not light) was 155km/p/h on gas
I could freely spin the rear wheels on a dry bitumen road - or car parks as was the want with 33's on, and even better when I went back to 11R's (32")
I had mine tuned for Race Performance on Gas (as it spent 95% of its time running on Gas )
it sucked dogs balls towing - fuel economy was real crap when towing, but would humm along at 100 without a problem - as long as there was no hills

Hmmm! What was the reason you couldn't get more than 155km/h?
Was it the road condition or the engine couldn't be revved high enough to produce enough power to go above 155km/h??!!
On normal flat highways(if you do), 155km/h is easy for a GQ within seconds after take off.
I'm guessing Wanneroo raceway hasn't got enough long straight stretches to reach high speeds?!

[garett]

stock RB30 dizzy is electronic.


i thought the rb30 had an optical dizzy ? the efi VL's had the optical well at least the few i've seen.
i've used some msd gear and it has done what was written on the box and so far no problems at all. they do make dizzy's not sure if they do one for these engines
a few guys who install gas systems tell me the dual curve stuff isn't really useful.
on another note i have come across a mixer installed backwards .....

[dom14]

it means my TD42 (1999 GU 4.2 diesel Naturally aspirated) had the Turbo and Intercooler off a 2006 TD42Ti (TD42 Turbo intercooled) fitted
but
it also has LPG Vapour system for more grunt

So, it's a Bifuel system?
I imagine it's not that easy to have a diesel engine tuned to run both on LPG and diesel one at a time, as in dual fuel LPG/petrol vehicles.
So, I'm guessing you TD42 can either run on diesel or diesel & LPG combined?!

[garett]

So, it's a Bifuel system?
I imagine it's not that easy to have a diesel engine tuned to run both on LPG and diesel one at a time, as in dual fuel LPG/petrol vehicles.
So, I'm guessing you TD42 can either run on diesel or diesel & LPG combined?!

most diesel gas stuff is dual fuelling either they cut back on the diesel and run gas to make up power ( economy) or add gas ontop of diesel (power)

[dom14]

stock RB30 dizzy is electronic.


i thought the rb30 had an optical dizzy ? the efi VL's had the optical well at least the few i've seen.
i've used some msd gear and it has done what was written on the box and so far no problems at all. they do make dizzy's not sure if they do one for these engines
a few guys who install gas systems tell me the dual curve stuff isn't really useful.
on another note i have come across a mixer installed backwards .....

I've seen the skyline dizzy, which is a different one than stock RB30 Patrol dizzy, 'cos VLs and Skylines are EFI.
I'm not sure about the internals of the VL, skyline dizzy.
RB30 Patrol stock dizzy is electronic(magnetic hole effect type with power transistor, I reckon) according to the Haynes, etc.
So, took it for it's face value.
I'm about to dismantle and fiddle with my spare dizzy.

Thanx for tip about the dual curve systems mate. I haven't bought a one yet.
http://www.aeb.it/Products/Products/CatID/8/Timing_advance_processors
I'll do enough home work before I decide go ahead and install a one.

[dom14]

most diesel gas stuff is dual fuelling either they cut back on the diesel and run gas to make up power ( economy) or add gas ontop of diesel (power)

Yeah, I think the term dual fuel means using both fuels simultaneously in whatever the optimum ratio. But, we use it in common terms for Bifuel(one fuel at a time).
Fellas in Perth apparently don't like the way we(VIC) use those terms. :)
So dual fuel in colloquial terms in Victoria means Bifuel in Perth, and perhaps in NSW as well?!

Back in late 90's MET buses in Melbourne had a all their buses converted to Diesel+LPG injection system(purely for economy I reckon).

[Bigcol]

Yeah, I think the term dual fuel means using both fuels simultaneously in whatever the optimum ratio. But, we use it in common terms for Bifuel(one fuel at a time).
Fellas in Perth apparently don't like the way we(VIC) use those terms. :)
So dual fuel in colloquial terms in Victoria means Bifuel in Perth, and perhaps in NSW as well?!

Back in late 90's MET buses in Melbourne had a all their buses converted to Diesel+LPG injection system(purely for economy I reckon).

never heard it called "Bifuel" in all the time I have lived in the west
only ever heard it called "Dual Fuel"

must be a Victorian thing to blame other states - like on TV, when someone leaves a show, they are always "moving to Perth"..............

[Bigcol]

So, it's a Bifuel system?
I imagine it's not that easy to have a diesel engine tuned to run both on LPG and diesel one at a time, as in dual fuel LPG/petrol vehicles.
So, I'm guessing you TD42 can either run on diesel or diesel & LPG combined?!

runs on Diesel, and has a small amount of Gas injected into the cylinder as well
I get 13L / 100 on straight Diesel
I get 12.5L/100 running Diesel Gas (and it has more power)
burns the fuel completely so even better for the enviroment

[Bigcol]

Is that an electronic ignition dizzy unit?
Where do you get dizzy unit?
Stock RB30 dizzy is electronic.
You can have it tuned either for LPG or Petrol, not both.
AFAIK, the only way for a non EFI system to adjust the ignition advance curve for both fuels is to install an ignition timing advance unit.
http://www.acl.com.au/web/acl00056.nsf/0/359683e8a538a3e64a2566c0007bb33e?OpenDocument
http://www.aeb.it/Products/Products/CatID/8/Timing_advance_processors

its an Automag
a Distributor and Magneto in 1 unit
used in race cars -

[Bigcol]

Hey BigCol,
I'm just wondering mate, I'm not too sure about LPG vapour ring system.
Is the combination of Impco 300A mixer and Impco model L converter fall under vapour ring system?!
Impco 300A mixer fits on top of the carby, and under the air filter.


thats looks like.............
nah, I cannot say it on a family forum

I would guess, by looking at that, that Impco (or whoever) have put the Convertor on top of a Sprint type mixer

OMG

[Bigcol]

Hmmm! What was the reason you couldn't get more than 155km/h?
Was it the road condition or the engine couldn't be revved high enough to produce enough power to go above 155km/h??!!
On normal flat highways(if you do), 155km/h is easy for a GQ within seconds after take off.
I'm guessing Wanneroo raceway hasn't got enough long straight stretches to reach high speeds?!

considering the speed limit on the roads is 110
a GQ weights in at aprox. 2.5T (well mine did)


have you NEVER watched the V8 Supercars on TV Dom....... especially when they run at Wannaroo Raceway - (Barbagallo Raceway)

considering I was running on Gas - I think 155Km per hour is quite a good score card............
60292

60293

[dom14]

considering the speed limit on the roads is 110
a GQ weights in at aprox. 2.5T (well mine did)


have you NEVER watched the V8 Supercars on TV Dom....... especially when they run at Wannaroo Raceway - (Barbagallo Raceway)

considering I was running on Gas - I think 155Km per hour is quite a good score card............
60292

60293

Well.......I was hitting 150km/h in flat stretches of NT without much trouble, but can't remember how quickly, but quick enough though.
It was only for few seconds or so. I was on 225/75R16. The odometer was showing around 160km/h, so the actual speed would've been around 150km/h.
It wasn't that hard to get to that speed and the vehicle was pretty stable without revving too high. I could've hit even higher, but didn't have any desire to meet my maker at that time.

[dom14]

Well.......I was hitting 150km/h in flat stretches of NT without much trouble, but can't remember how quickly, but quick enough though.
It was only for few seconds or so. I was on 225/75R16. The odometer was showing around 160km/h, so the actual speed would've been around 150km/h.
It wasn't that hard to get to that speed and the vehicle was pretty stable without revving too high. I could've hit even higher, but didn't have any desire to meet my maker at that time.

I rarely watch car racing, but did like speeding bikes at Grand Prix in Melbourne. :)
I enjoy rough driving, as long as no mud is involved. :D
Getting bogged in mud is no fun for me. :D

[dom14]

thats looks like.............
nah, I cannot say it on a family forum

I would guess, by looking at that, that Impco (or whoever) have put the Convertor on top of a Sprint type mixer

OMG

That's the standard Impco setup for RB30 carby. What you see in the picture is the Impco 300A mixer, coupled with the model L converter, it seems to be working fine.
It's an approved setup the Vic alternative fuel board fellas.

[dom14]

never heard it called "Bifuel" in all the time I have lived in the west
only ever heard it called "Dual Fuel"

must be a Victorian thing to blame other states - like on TV, when someone leaves a show, they are always "moving to Perth"..............

So, the standard setup of one fuel at a time(either LPG of petrol) is called dual fuel in Perth(not bifuel)?

[dom14]

most diesel gas stuff is dual fuelling either they cut back on the diesel and run gas to make up power ( economy) or add gas ontop of diesel (power)

Ok, cool. Do you call that system dual fuel or Bifuel?

What do you call LPG/Petrol systems that we use, which only run on one fuel at a time? Dual fuel or Bifuel?
I'm trying to work out what exactly is Bifuel! :)

[dom14]

wrong

depending who fitted it
what system they were using
and what parts were available

my L28 had the Vapour ring, and a Vialle converter - which I changed to an Impco converter
my TB42 had an Impco Converter and Sprint mixer - which I changed to a OMVL Converter

Ok, cool I thought it has to be an approved system by the alternative fuel board(at least in Victoria).
I was told combining different brands, or different units aren't that easy due to the regulations.
But, I'm not too sure about that though, could be just heresay from somewhere I reckon.

[Bigcol]

Well.......I was hitting 150km/h in flat stretches of NT without much trouble, but can't remember how quickly, but quick enough though.
It was only for few seconds or so. I was on 225/75R16. The odometer was showing around 160km/h, so the actual speed would've been around 150km/h.
It wasn't that hard to get to that speed and the vehicle was pretty stable without revving too high. I could've hit even higher, but didn't have any desire to meet my maker at that time.

I have a 4.7L V8 for going fast

I had my GQ for going off road........

[Bigcol]

That's the standard Impco setup for RB30 carby. What you see in the picture is the Impco 300A mixer, coupled with the model L converter, it seems to be working fine.
It's an approved setup the Vic alternative fuel board fellas.

my mates RB30 one is the same as my old one on the TB42
Sprint mixer & Impco Convertor on the inside of the guard

I think it depends on the installer and what systems / parts he is using for the conversions

[Bigcol]

So, the standard setup of one fuel at a time(either LPG of petrol) is called dual fuel in Perth(not bifuel)?

yeppers

its called Dual Fuel - as there is 3 different fuel types going into the same engine

never heard it called bifuel - thats gay.......

[Bigcol]

Ok, cool I thought it has to be an approved system by the alternative fuel board(at least in Victoria).
I was told combining different brands, or different units aren't that easy due to the regulations.
But, I'm not too sure about that though, could be just heresay from somewhere I reckon.

has to be approved supplier and an approved installer here in Perth as well
under the Road Traffic Act

ok, so what happens if your Tacometric Relay dies - you wont find another the same as what you have, as it has probably been superseded
do you go for something similar (maybe 5 wires instead of 4 or vise a versa ) or pull out the whole system because its Not the same as what was fitted??????

a bit like not being allowed to replace your drag link with a Tough Dog one, because your one is bent..........

I think someone is pulling your chain


as long as it is an Approved installer (who SHOULD know what they are doing) - there is no reason for it not to be legal

must be approved by the Transport Dept. I think they do it

[dom14]

yeppers

its called Dual Fuel - as there is 3 different fuel types going into the same engine

never heard it called bifuel - thats gay.......

Well........the guy who introduced me to that word and who called himself a trainer of LPG installers, was from Perth, WA. So, don't blame me, he's one your neighbours. :D
He claimed he's working at the alternative fuel board in WA, so if you come across the fella, say hello to him for me & tell him I don't discriminate. :D
BTW, bi community will be offended by you calling them gay. :D :bananadancing::clapping:

[dom14]

has to be approved supplier and an approved installer here in Perth as well
under the Road Traffic Act

ok, so what happens if your Tacometric Relay dies - you wont find another the same as what you have, as it has probably been superseded
do you go for something similar (maybe 5 wires instead of 4 or vise a versa ) or pull out the whole system because its Not the same as what was fitted??????

a bit like not being allowed to replace your drag link with a Tough Dog one, because your one is bent..........

I think someone is pulling your chain


as long as it is an Approved installer (who SHOULD know what they are doing) - there is no reason for it not to be legal

must be approved by the Transport Dept. I think they do it

I reckon electric stuff like LPG safety switch & gauges, etc can be replaced by similar ones without having to go to a qualified installer. Of course, if the replacement is not compatible, then you have a problem and probably have to go to an installer to have it properly wired. I had to replace my safety switch. The original one was some crap brand and I replaced it with a PEEL safety switch, which is still going without any dramas.
What I was been told by a fella(perhaps from NSW or Queensland), that there are approved converters and a mixers or hybrid of those for each car by the alternative fuel board. Even though it can perfectly fit, just importing a brand and model that's not in the alternative fuel board's approved list won't be allowed to install on cars. Dunno about the truth of it, but that's what i was told.

Hey....hang on a sec.....you kicked my ass repeatedly in the other thread for messing with my LPG gear, now you've become liberal and calling me chicken. :groupwave::clapping:;)

BTW, if you are right, I would go back to my original idea of importing a LPG liquid sequential injection system(comes with it's own ECU) from China and either install/upgrade myself or get a fitter to do that. I was going to get a kit anyway, but couldn't find a kit that's guaranteed to work with a 6 cylinder carby engine. Plenty for 4 cylinder engines though.

[Bigcol]

BTW, if you are right, I would go back to my original idea of importing a LPG liquid sequential injection system(comes with it's own ECU) from China and either install/upgrade myself or get a fitter to do that. I was going to get a kit anyway, but couldn't find a kit that's guaranteed to work with a 6 cylinder carby engine. Plenty for 4 cylinder engines though.

as long as it is Approved by who ever does it
and
as long as it is fitted by an Approved installer

[Bigcol]

Well........the guy who introduced me to that word and who called himself a trainer of LPG installers, was from Perth, WA. So, don't blame me, he's one your neighbours. :D
He claimed he's working at the alternative fuel board in WA, so if you come across the fella, say hello to him for me & tell him I don't discriminate. :D
BTW, bi community will be offended by you calling them gay. :D :bananadancing::clapping:


but they are......................?

and they are happy

[Bigcol]

Well........the guy who introduced me to that word and who called himself a trainer of LPG installers, was from Perth, WA. So, don't blame me, he's one your neighbours. :D
He claimed he's working at the alternative fuel board in WA, so if you come across the fella, say hello to him for me & tell him I don't discriminate. :D
BTW, bi community will be offended by you calling them gay. :D :bananadancing::clapping:


he was pulling your plonker

no such "board"

http://www.transport.wa.gov.au/licensing/alternative-fuels.asp

[dom14]

but they are......................?

and they are happy

Was Cary Grant ever happy?

[threedogs]

Gas only needs a hole so stalling on gas is a mystery atm to me.
It could be dual fuelling but only if wired incorrectly,
Isolate one fuel say gas as that is your main fuel and get it tuned for that.
Gas needs the electrics to be spot on as Big Col states leads in good condition.
spark plug of the correct heat range, timing needs to be just off pinging on fuel
because gas likes it advanced.eh keep us updated

[4bye4]

considering the speed limit on the roads is 110
a GQ weights in at aprox. 2.5T (well mine did)


have you NEVER watched the V8 Supercars on TV Dom....... especially when they run at Wannaroo Raceway - (Barbagallo Raceway)

considering I was running on Gas - I think 155Km per hour is quite a good score card............
60292

60293

Mate 155 was about all we got from the mighty HQ (not GQ). Mind you after 3 laps we couldn't stop it anyway.

60300

[Bigcol]

thats why I never went over the 155 mark

was watching that corner coming awfully fast towards me
and my faith in my brakes was leaving in the opposite direction at the same pace

was good fun though

worst part - and an expensive lesson to learn - more power does not mean more towing grunt

but you get that

[Bigcol]

bohall, have you gotten an update for us..........????

really want to know

[dom14]

He's probably still recovering from last weekend's beer treatment. ;)

[bohall]

Since this post and a full tank of gas it has behaved . How do i post images on here ill put up a photo of my rig and engine bay

[bohall]

6033660337603386033960340 a few pics

[bohall]

60341 6034260342

[Bigcol]

oooohhhh
nice and red................

now, you see this here Valve -
60343
this controls the amount of Gas going into your Carby
for some strange reason, that I could never work out, whenever the bonnet is open, people like to play with it
twist it in, or out

and then the car runs crappy

when you get it tuned, good idea to put a nice little mark on it and the pipe
so if anyone DOES play with it, at least you can get it back again

[Bigcol]

now, you see all the connectors, if they look like this -

60345

go get your crimping machine, and whole heap of plugs, and replace every one of them
see the end of the copper - and its brownish - dirty - need to clean them - snip the end off, scrape the ends of the wire until its clean, and replace with new plug

[Bigcol]

with that "flash lube" bottle near the fire wall

sewing machine oil is just as good, and cheaper

[bohall]

The guy i bought her off reckons he didnt use any oil in that container ??? Lol i like the price of gas but im new to all the gear that goes with it

[Bigcol]

The guy i bought her off reckons he didnt use any oil in that container ??? Lol i like the price of gas but im new to all the gear that goes with it

the oil is to help lubricate the upper cylinder, as Gas is dry - so things like Valve stem seals dry out and crack and then oil drops into the cylinders, and you burn it
and then you think your rings are shot

also helps lube the parts of the carby that would normally have liquid petrol running over them - the butterfly's etc

[Bigcol]

I've had 4 cars that were Gas powered
MK with 2.8L petrol gas
AUII dedicated Gas
GQ 4.2L carby petrol gas
GU 4.2L Diesel Gas

I do like it , but not the cost to get it fitted
lucky, all my cars were already fitted before I brought them

when I brought the MK - Gas was $0.21 per Liter
used to cost $22.00 to fill the 80L tank, and used to do about 400Kms in it per week

[dom14]

oooohhhh
nice and red................

now, you see this here Valve -
60343
this controls the amount of Gas going into your Carby
for some strange reason, that I could never work out, whenever the bonnet is open, people like to play with it
twist it in, or out

and then the car runs crappy

when you get it tuned, good idea to put a nice little mark on it and the pipe
so if anyone DOES play with it, at least you can get it back again

Yeah, I bought one of those power valves to fit in. Then realized it's too small for the LPG hose I have.
It's still sitting in the car. I can't use that power valve without any mods to it, and can't find a power valve to suit the
the Impco 300A mixer hose diameter.
Can you guys point me to the right direction where to find a one?

[dom14]

with that "flash lube" bottle near the fire wall

sewing machine oil is just as good, and cheaper

Hey BigCol,
How do you get "flash lube" or sewing machine oil to mix with LPG?

[Bigcol]

Hey BigCol,
How do you get "flash lube" or sewing machine oil to mix with LPG?

its setup to "dribble" into the intake
mine was on a fitting drilled and tapped into the manifold
I think it was
1 drop per 55 seconds
or something like that, cannot remember off hand

[dom14]

its setup to "dribble" into the intake
mine was on a fitting drilled and tapped into the manifold
I think it was
1 drop per 55 seconds
or something like that, cannot remember off hand

Yeah, but what is the mechanism you use for that timing?
Where do you get it from?
Thanx

[Bigcol]

works on the Vacuum from the inlet manifold

http://www.flashlube.com/en/company/how-flash-lube-works.html

[mudnut]

As well as an upper cylinder
lubricant, I thought the
flash lube also had a lead
replacement that was first
designed to coat the
the valves in pre-unleaded
engines. I suppose it
isn't as crucial in an
unleaded engine though
as the valves are already
hardened.

[bohall]

So what oil should i choose lol

[dom14]

So what oil should i choose lol

snake oil?!! :D

[GQ TANK]

Hi Dom,

I suspect the IMPCO 300a has a power valve built in see item 3

http://www.teecoproducts.com/Catalog/PDF%20Files_Catalog/IMPCO/IMPCO%202006%20CAT-300A%20Series.pdf

If you are using a ring mixer - then you need a power valve

[dom14]

Hi Dom,

I suspect the IMPCO 300a has a power valve built in see item 3

http://www.teecoproducts.com/Catalog/PDF%20Files_Catalog/IMPCO/IMPCO%202006%20CAT-300A%20Series.pdf

If you are using a ring mixer - then you need a power valve

Hi mate,
Yes, it has both WOT and idle mixture valve adjustments. But, apparently not a good idea to try tuning it without an air/fuel mixture analyzer or O2 sensor gauge. I thought about trying it the old school carby tuning method of by ear. I haven't touched it yet. I need open up the mixer first and look for any diaphragm damage. After that, I'll get to the tuning it and see whether it needs tuning at all. Perhaps, it's better not to fix it if it ain't broken. :)