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Old 06-06-2009, 10:40 AM   #31
94cobra69ss39694cobra69ss396 is offline
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You also need to pull some timing out. I think you said that you were running around 34⁰ full advance which is way too much on a boosted engine running on pump gas. I didn't tune my car but I think the tuner said that full advance was somewhere around 20⁰-22⁰ and I'm only making 8-9psi. Are you using a boost retard ignition box? If not you should. That way you can run more timing at lower boost and still be safe in the higher rpms when it's making more boost.
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Old 06-07-2009, 12:34 PM   #32
enkeivetteenkeivette is offline
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Quote:
Originally Posted by 94cobra69ss396 View Post
You also need to pull some timing out. I think you said that you were running around 34⁰ full advance which is way too much on a boosted engine running on pump gas. I didn't tune my car but I think the tuner said that full advance was somewhere around 20⁰-22⁰ and I'm only making 8-9psi. Are you using a boost retard ignition box? If not you should. That way you can run more timing at lower boost and still be safe in the higher rpms when it's making more boost.
Way different for a Ford motor, timing on a high performance NA Chevy would be in the 36-40 range. Low for boost would be in the 26-34 range. I will pull it, but not that low.

I was in Autozone yesterday renting some tools and a Firestone mechanic started asking me what I was doing. He went on to recommend that I advance the timing from 34 to 44 to prevent detonation. A little bit of knowledge can be dangerous.
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