High compression?
Moderator: John_Heard
High compression?
Is anyone spraying with 15:1 or higher compression, and how much?
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Re: High compression?
My motor is almost 15 to 1, probaly a little less, and I spray a 32 jet on it. Supposedly around 300 hp. I see engines all the time at 15 to 1 with alot on them. With high cr your nitrous tune up is less forgiving though.
Re: High compression?
agreed with post, when i had my 572 built, my builder said he was working on a 632 with 15:1 compression to be set up with a 400 shot of nitrous in the works for a customer....
Re: High compression?
If i am at 15:1 compression and 36 degrees timing what should I pull out of it for a 200 shot?
Re: High compression?
I would pull it back to 28 deg.99camaro wrote:If i am at 15:1 compression and 36 degrees timing what should I pull out of it for a 200 shot?
Blackhoodmafia!!!!
1972 Nova SS
572 C.I. BBC
Best to date: 1/8
et: 5.28
mph: 134
new wt. 3340 lbs
1972 Nova SS
572 C.I. BBC
Best to date: 1/8
et: 5.28
mph: 134
new wt. 3340 lbs
Re: High compression?
id think 36 degrees is quite a bit for15 to 1 compression.id think on motor u should be like 31 or 32....anyone know for sure?i prob would think 28 with his motor and 200 squirt is right on upper side eh?????
- John_Heard
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Re: High compression?
More than you think it needs...~ 24-26* or so. Keep it lean and work your way into the heat adding timing till you get the mark on the plug looking good.99camaro wrote:If i am at 15:1 compression and 36 degrees timing what should I pull out of it for a 200 shot?
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- Chevyfireball
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Re: High compression?
I have a 632ci with two stages. 14.5:1 compression. Initial timing 32*. First stage is a 400hp shot and I pull 11*. Second stage is 300 hp in at .4 secs and I pull another 5* leaving 16* total.
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