Does 98 Octane petrol improve performance of 4.2 petrol GQ
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Yeah Bigcol ......Seems like a lot of the Patrols run better on gas than petrol. The 2 I've owned seem to run smoother. The previous TB42 had way less power on gas, but the new TB42E with impco gas seems to go great - don't know what it runs like on petrol yet, the pump is on my bench at the moment, it would idle sweet but just backfire and cough if you tried to drive it on petrol.
I wasn't saying the Troll would overheat if you ran it on gas - just that engines running gas generally run hotter than running petrol.
"Can't" is a dirty 4 letter word.
Best way to deal with a "Can't" is to chop off the "t" and brew it in boiled water for a few minutes.
Sip on the "t", and consider what you've got left to work with
my old laser went from 300km a tank on e10 to 500 km a tank on 98 with a msd 6al, coil, and timing and carby tune. it also hauled a$$. traction became the biggest problem
That's a 66% improvement in fuel efficiency, and not to mention the significant power increase.
I remember you advising me on MSD 6AL ignition unit.
It's "dual curve" unit?!
Yeah Bigcol ......Seems like a lot of the Patrols run better on gas than petrol. The 2 I've owned seem to run smoother. The previous TB42 had way less power on gas, but the new TB42E with impco gas seems to go great - don't know what it runs like on petrol yet, the pump is on my bench at the moment, it would idle sweet but just backfire and cough if you tried to drive it on petrol.
I wasn't saying the Troll would overheat if you ran it on gas - just that engines running gas generally run hotter than running petrol.
I turfed the standard fuel pump and put in an electric one
as soon as you flicked from Gas to petrol, the pump started to pump
mine was a 1989TB42 carby
I had a Sprint Gas mixer on the top of the carby
electronic ignition
extended rotor
silicone plug leads
and lots of other goodies
was tuned for Gas performance, as it would only go into Petrol once a week
but I could switch from Gas to Petrol or Petrol to Gas on the move - alot of people seem to have trouble switching from one fuel to another
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
That surprises me Col- very interesting.
My first Troll was an 89 Auto TB42 , I don't remember what gas system was fitted but it had a venturi on top of the carby fed by twin vapor hoses. Also ran an electric shuttle pump when the original mechanical pump went- maninly because Nissan wanted over $300 for a new one and a Faucet pump was only $40
Fitted HEI ignition , extended rotor, 4x prong plugs to deal with problems of engine "kicking" sporadically, ended up being resistance/dry joint in the main power feed wire near the fusible link beside the battery.
Also made up an overide to use the auto box like a manual with a H pattern shifter and TC lockup. Went really well, but had considerably more power on petrol no matter how it was tuned. I think the lack of power came form tha gas converter not being big enough capacity for the 4.2 , but really only ever used the petrol as a backup for when the gas tank went dry.
"Can't" is a dirty 4 letter word.
Best way to deal with a "Can't" is to chop off the "t" and brew it in boiled water for a few minutes.
Sip on the "t", and consider what you've got left to work with
That surprises me Col- very interesting.
My first Troll was an 89 Auto TB42 , I don't remember what gas system was fitted but it had a venturi on top of the carby fed by twin vapor hoses. Also ran an electric shuttle pump when the original mechanical pump went- maninly because Nissan wanted over $300 for a new one and a Faucet pump was only $40
I think the lack of power came form tha gas converter not being big enough capacity for the 4.2
interesting that you say that
I had an MQ/MK with the L28 6cylinder motor - it was constantly starving for Gas under loads, until I put in a bigger convertor
and when I brought my GQ - I told my Mech to up-grade the convertor - as a TB42 is a B I G engine (compared to the Ford 4.0L & Commodore 3.8) - which he did, and I never had any more problems with it
I also think the mixer on the Carby has a lot to do with how well they run
some of the problems I encounted with trying to get the Gas tuned can only be answered by the fact the Mechanic did not know as much as he thought
went to one "Gas Specialist" to get a tune up, (no petrol in the car at all) come back later - the Bill has $10 for petrol on it - what for....? so we could tune it............ ummmm your a Gas Mech - its a Gas car I want it tuned for Gas - oh, but most people dont notice...... well I did, and as far as I am concerned I am not paying ANY of the bill, as you did nothing that I wanted done
went to another "Gas Specialist", parked it under his sign out the front
come back 4 hours later -
Cars ready - no its not, its not been moved, - yes it has, - no it has not, - yes it has - why do you say nothing has been done - well, I do have the keys in my pocket - because I forgot to leave them, and its still locked and parked where I left it.........
Tidy Whitey - 99 GU TD42Ti - Diesel Gas, (GUIV Turbo & Intercooler 8Lb boost), 33" Micky T's Baja MTZ's, Dual Batt's, Cargo Barrier, rear draws, HID Super Oscars, winch, Grinch & witch attached and more goodies to come
"A self proclaimed Expert is someone who hasn't learnt enough to realize how little they know"
Or as my dear Mum always says " X is an unknown quantity, and SPURT is a drip under pressure"
"Can't" is a dirty 4 letter word.
Best way to deal with a "Can't" is to chop off the "t" and brew it in boiled water for a few minutes.
Sip on the "t", and consider what you've got left to work with
@Bigcol I ran that new generator mixer on my 650 4 barrel powered chev troopy
Trouble was it only feed gas to the back two barrels , we farted around with and
ended up getting fuel to all 4 barrels, Blew away most 4x4s and was a sheep in
wolfs clothing, I also found having the open air filter a pain in the butt with water
crossing and dust. I have my mates at the airport make a sheild for the front to
protect the air filter from muck, worked a treat.In the end I brought an early Holden
air filter
04 ST 3lt auto, not enough Mods to keep me happy, but getting there
@Bigcol I ran that new generator mixer on my 650 4 barrel powered chev troopy
Trouble was it only feed gas to the back two barrels , we farted around with and
ended up getting fuel to all 4 barrels, Blew away most 4x4s and was a sheep in
wolfs clothing, I also found having the open air filter a pain in the butt with water
crossing and dust. I have my mates at the airport make a sheild for the front to
protect the air filter from muck, worked a treat.In the end I brought an early Holden
air filter
I have just got a 4.2 gq and went to cape york.was pulling a trailer and was using 3 kls per litre.Are they usualy this thirsty?
Originally Posted by garett
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