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Straight gas? whats needed? 

 

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 Post subject: Straight gas? whats needed?
Posted: Thu Mar 12, 2009 11:20 am 
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i know there are posts but i cant find any.

but im wondering whats needed to get a gain from straight gas setups? ive got an ED duel fuel wagon and i can get a second tank and cradle for nothing but what else would i need and what do i need to do under the hood for real gains?

budget is a big thing too. its a small budget

 

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soon to get: AU diff, upc 330mm brakes, Vapor LPG injection.

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 Post subject: Re: Straight gas? whats needed?
Posted: Fri Mar 13, 2009 1:10 pm 
Getting Side Ways
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I suggest a Gas only TB, like one from GRA.
Set base timing to suit.

Then enjoy.
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 Post subject: Re: Straight gas? whats needed?
Posted: Fri Mar 13, 2009 1:27 pm 
Getting Side Ways
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remove the std intake manifold...customise the intake to suit a low restriction mixer like impco 425...

get the ecu ignition maps remaped to suit lpg

wont be cheap as there is limited support for the I6, so expect to pay$$$

else keep your std setup and just remove the tank...hey presto straight gas!!

 

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 Post subject: Re: Straight gas? whats needed?
Posted: Sat Mar 21, 2009 2:00 pm 
Stock as a Rock
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Straight gas is the way to go. Dual fuel is usually a compromise with engine setup, different fuels like different tunes.
Ive got a ef wagon straight gas did the conversion myself. I ripped out the fuel tank, fuel lines & charcoal canister. The fuel rail & injectors went and I installed little welch plugs in the manifold.
Also changed the plugs one head range colder for the lpg went with the bp6ey ngk plugs.
When I did the head gasket I got 1mm machined off it to raise the compression to 10:1 which lpg really loves.
Im using an impco 225 mixer with std airvalve, b2 converter, pod filter. To help with the first start of the day I fitted a primer which connects straight off the primary port thru a regular petrol lock off solenoid connected then into some 6mm hose into an adapter into the secondary port of the converter. Ive got a little push button on the side of the steering column that i usually just hold in for 3 or 4 seconds then it starts in about 5 or 6 turns of the engine. Once the converter is up to temperature it starts almost instantly - quicker than a regular ef on petrol does anyway.
Also ripped out the original ecu and put an a tickford gas ecu from an ef ii, i think we managed an extra 2L per 100 with the ecu alone. it picks up some power too.
Im thinking about getting an lpg grind camshaft for it.
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 Post subject: Re: Straight gas? whats needed?
Posted: Sat Mar 21, 2009 5:37 pm 
Getting Side Ways
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Luke111, what type of gas tank are you using?

And when you removed the tank did you just make up a plate to fill in the hole?

I have the scuba tank setup. I was wondering if I could mount a second scuba tank under the original if I took out the petrol tank.

BenJ

 

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 Post subject: Re: Straight gas? whats needed?
Posted: Sun Mar 22, 2009 2:05 pm 
Stock as a Rock
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im using a a90 tank, apa. Ive run it completely dry once (had to get flat towed to the servo) and it took 68litres.
I used a 2-176ohm sender unit it so it uses the original fuel gauge. i ended up putting a 22ohm resistor in the wiring to make the distance to empty right.

I got a big plate cut out at a sheetmetal supplier. I used 3mm steel and sealed it up when I installed it. I just use that area for the jack, wheel brace, spare intake pipe etc.

I also removed the petrol filler neck and I cut out a piece of stainless steel 2mm to cover the hole.
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