Tb42 duel fuel carby issues

[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/...nce_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.n...e?OpenDocument
http://www.aeb.it/Products/Products/...nce_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