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Old 06-06-2004, 06:48   #1 (permalink)
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lpg 302 plans... any tips?

hi,
im planning on in the not too distant future(within 6 months) updating my 302 with a gra twin carb/twin converter setup with a mild cam and all the other necesary bits for a good lpg setup, as well as probably a electronic ignition system. now what i was wanting to know is what do you all think of this. and also what are some of the bit required for a hearty lpg setup(hardened valve seats ect.) one thing that must be kept in mind is that i am gonna be on my p's so cant have *too much* power, but then again cops around here are a bit numb to the power/weight rules(there is a twin turbo 180sx getting around on p's, as well as a couple of gtr skylines)

thanks,
travis

BTW im planning on updating to a 351 in a few years, hence the twin carb/converter, so any other bits and pieces that are able to be used effectively on both a 302 and 351 would be good.
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Old 06-06-2004, 18:26   #2 (permalink)
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Re: lpg 302 plans... any tips?

Unless your planning on running one very serious 302 a dual GRA setup will actually cost you power because they supply way too much gas at WOT even with the smallest carbs and jets. Many people will tell you you can't run overly rich on a straight LPG setup but in my experience that is untrue and does cost power.

You'd be better off going for a single carb, because if you need a second throttle body one can be added in easily enough.

I take it your on your 'P's in Vic. No need to be *that* worried about the power restrictions because there is no way for them to tell how much power you have... unless they strap your car to a dyno which i've never heard of them doing. Displacement they can check though, so sticking to the 302 is a good idea.

A good single plane manifold like a Weiand X-cellerator will be good on the 302 and better on the 351. Your heads will need hardened seats and stainless valves are highly reccomended. Also remember that straight LPG needs a bigger cam than you would normally use for petrol... Approx 10% larger. If your unsure about which cam to choose ask the cam manufactures. Most are happy to help.
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Old 06-06-2004, 19:25   #3 (permalink)
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Re: lpg 302 plans... any tips?

i was thinking ide get a cam from that group associated with GRA. Are they good or should i go for a more well known brand when getting a cam?
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Old 06-06-2004, 20:15   #4 (permalink)
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Re: lpg 302 plans... any tips?

I don't know of anyone running a 'Voodoo' camshaft from GRA so I can't say if they're any good.
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Old 06-06-2004, 22:13   #5 (permalink)
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Re: lpg 302 plans... any tips?

Quote:
Originally Posted by xdc351
I don't know of anyone running a 'Voodoo' camshaft from GRA so I can't say if they're any good.
I used the stage 3 voodoo cam in my new 351 I just built. Engine went in on weekend, got to finish connecting everything up.. hopefully be on the dyno in two weeks.. Will let you know how it goes.
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Old 06-07-2004, 00:02   #6 (permalink)
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Re: lpg 302 plans... any tips?

great thanks.
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