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Old 01-10-2003, 09:42   #1 (permalink)
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DEV kits and LPG

Looking in the long run to install an EL/AU 4.0l into my EA and run it on straight gas through a GRA system. Now not to be content with the 157kw, im after a fair bit more.

Seing the engine will be on straight gas, the compression will be braught up to between 10.25 and 11:1, and the cat+emissions systems removed.

Im wondering wether DEV kits, or other kist of the like will have the same leve of improvements found in ULP engines if i run straight LPG with high compression?

I was thinking
4l EL/AU motor (stright LPG)
10.xx + compression slight polish of intake and match porting
GRA gas carby
DEV 5 (or equivelent gas cam)
Mock extractors
2.5" exhaust (no cat)

Peoples thaughts on the matter would be greatly apreciated.
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Old 01-10-2003, 16:17   #2 (permalink)
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I dont know much about this but is the cat for petrol powered only?
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Old 01-10-2003, 16:36   #3 (permalink)
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as far as I know the cat was only introduced when ULP was due to it killing us if burnt without one.
I doubt straight LPG systems need a cat, check out the deicated LPG Falcons and have a look underneath...should shed some light
Usually there is a slightly different cam profile for a dedicated LPG engine, but Im sure they will be able to make one custom for you if required. Should give Mock a call and see what they have to offer. Apart from that you will have to overcome the sump issues of the AU engine...would probably be easier to fit the 4.0i EL engine as I think they use a similar/same sumps as the EA. the car will have to be setup on a dyno to get the proper advance curve etc but im sure you will be able to see a fair few horses out of straight LPG.

May I ask why you want just LPG? so the emissions become redundant?
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Old 01-12-2003, 00:09   #4 (permalink)
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On almost the same topic, would a Dev 3 kit would on a dual fuel falcon?
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