C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

boost timing retard

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Old May 7, 2008 | 12:36 PM
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lead foot 85 vet's Avatar
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From: providence ut
Default boost timing retard

At what lb of boost are you guys pulling timing ? and how much ?........for years running the p600b I haven't had to worry about it, but with the d1 I am getting boost earlier and more at high rpms, so it's time to adjust my timing table........thanks for the help..... Bert
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Old May 7, 2008 | 02:41 PM
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From: Fremont Oh
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The rule of thumb is about a degree per pound of boost... If you are running Water Methanol you may find you can be more conservative.

I generally log my runs, do a 25, 50, 75% throttle run looking at your knock retard after each run then you can pull some of the timing with programming , distributor setting or increase your BTM setting.

hope this helps...

Mo
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Old May 7, 2008 | 06:04 PM
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From: providence ut
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Thanks Mo..........why pull timing at low boost?
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Old May 8, 2008 | 12:07 PM
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From: Fremont Oh
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You mmay not need to pull timing at low boost. It all depends on how youare pulling timing. With a BTM it is a **** you set for 1-# degrees per pound of boost.

If you are programming your PCM /ECM then you can be more specific as towhere you are pulling the timing.

hope this helps

Mo
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