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Old 05-18-2003, 03:30   #1 (permalink)
Phat Drift Damage Victim
XplodEd EA's Avatar
Join Date: May 2002
Location: Brissy
Age: 31
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EA LPG Head Mods

Well the time has come to do some mods, the head is off and bein tested and if it comes back good I'll be doin some mods too it. Basically it's a CFI 3.9 dual fuel with a 2.5" mandrel bent exhaust with pacemakers. The idea of goin straight gas with the CFI manifold has been seriously thought about. The reason for using the CFI manifold is so that the gas gets distributed evenly to all cylinders.

What I need to know is what exactly to do with the Head as this is my first car I'm modifying I'm still in the dark with performance mods. What sort of a Cam should I be looking for and what should I be doin about the valves etc. I've read somewhere that something like a crow stage 2 cam won't idle well with the CFI manifold, is there anyway around this?

Any suggestions or comments are highly appreciated
Phat Drift Damaged Cobalt Blue 1994 EF XR8 5 spd
Fully optioned - Sunroof, cruise, body kit
Stock as a Rock for the moment

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Old 05-18-2003, 17:32   #2 (permalink)
8 cylinder symphony
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Join Date: Mar 2002
Location: Sydney
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To be honest, the easiest and most cost effective way around it is to convert to MPI...you'll gain 20more kw @ engine as well how ever many the cam you wan tot throw in provides...
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Old 05-19-2003, 02:33   #3 (permalink)
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maybe get it shaved a bit to up the compression to say 10:1, you can run a bit higher on LPG. GasResearch australia have cam's sepcially designed for straight gas use, might be good to look into :)
also getting your distributor advance curve optimised for LPG is meant to be worth a few kw :)
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