Outer Limits 4x4 Board

dose anyone know anything bout gas research setups???

is it worth it??

i want to put some of there gear on my 308 hilux that is dedicated to gas.

any power loss/increase, more eco, ect

thanks

I used to own Gasresearch Performance Centre in Dandenong(5 years), and prior to that worked for Gasresearch Australia (4 years). In that period we must have converted 1000's of cars and tuned 10's of thousands. Many vehicles came in for upgrades from their existing systems for more power. On2 occasions we made only the same power that I can recall, one one the part throttle improved and the owner was wrapped, the other was removed under the gurantee we offered, unfortunatly that customer had a worn out distributor and improving cylinder filling won't net a gain with a busted ass ignition.

Correctly fitted and tuned you will get a definite improvement over an existing LPG system and usually performance equal to or very similar to petrol.

Joel

oh sick

well it has to be better then the setup i have.
is the mixer more robust cos as soon as i get a lil mud on the diafram on my impco one it starts being silly. its also a ass to try n tune or start if the mix is a bit off??

i was thinking of getting a cam to for a bti more power

the mixer is in the trottle body. so as ling as you have a air cleaner and its all hooked up and no leaks you will be fine. are you after this sort of setup (but on a 308)
throttle body im showing


or twin throttle bodies ?. if you single you will most likely need one of these


single


and if you go single you will need one of these


cheers adam

browny_x wrote:oh sick

well it has to be better then the setup i have.
is the mixer more robust cos as soon as i get a lil mud on the diafram on my impco one it starts being silly. its also a ass to try n tune or start if the mix is a bit off??

i was thinking of getting a cam to for a bti more power

The mixer/carb is very robust although mud can make it a bit sticky, I used to carry a can of CRC to lubricate the metering rack gears, the converter is the same as an Impco, simple converter except for the operating pressures.

Joel

thread hijack

hey joel

have you ever set up a 351 clevo on straight gas with the twin throttle body?

Probably 100's to be honest, when I was doing lots of it the affordable "hot" cars were XD-XE and VB-VL at times we would do 2-3 a week.

Joel

awesome pics

yeah i think im gonna get a single one and have duel air intake ( twin snorkels) meeting in a t shape on the end of the mixer intake.

i think the single will be enough as a standard 308 cant draw more then like 300 something cfm and a single goes up 2 like 500, i think thats how i worked it out to be?????

any help joel

I use (CID * max rpm)/3456 which converts Displacement and rpm to CFM
so (308*6000)/3456=534 CFM.
this is assuming 100% efficiency, 85% tp 90% is more likely for a 308, later engine s can achieve 100% due to improved manifold design and variable cam timing alike.

534-15%=453 CFM

One carby will do it just to 6000 rpm.
If doing twin snorkels build a "Y" not a "T" for better flow.

Singles go to 510 cfm but I wouldnt go past 480 cfm on a single, they are more for twin setups as a secondary carby for tuning reasons, twins go to 1000 cfm.

Cheers

Joel

ow i see so do you reken i need a twin. dad said its heaps over kill but im not sure. i thin 1 will do the job as i rarely rev it to 6000 ( the tacho only goes to like 4) so im guessing 1 will do

we run 1. ours gets rev'd to 6000 nearlly every day but ours is a rb30

It will stil do 6000 rpm but may not make full power. The best example was my old 304 VN. I ran a single carby and it revved to 6800 rpm no worries as the gasresearch is tuneable. It made 185 rwkw. I put two on and made 215 rwkw. This was a .580" lift 242 degrees @ .050" soild cam and ported heads that made its best power from 3000-6500 rpm. You will have a smaller cam (I hope) in a big heavy 4wd, depending heads and manifold I would expect between 120 and 150 rwkw, a single vs twin make only be a difference on 5kw as that power/air flow is much more within the realm of the singles carbies limitations.
Is that small gain worth the additional cost? Personally I'd say not really.

Joel

I have a full bolt on twin Gas reaserch set up for sale with twin B2 convertors twin manifold ect cheap. PM if interested.
Mark

Dont know if it was just a myth but i was told years ago that a completely dedicated gas motor and set up will make more power than a comparible petrol set up

We used to due to the higher octane allowing us to run a bit more compression, petrols have improved a lot since then and its not the case so much now. Some vehicles get better performance after a convrsion, particularly vapour injection but this is more due to the poor (generic and very safe) tuning of the manufacturers, the same way you can get more out of petrol cars that you can re-tune the maufacturers tune. Manufacturers tend to run vehicles quite rich under power which is not best for peak power.

Joel