Lt1 spark advance
04-17-2013, 11:44 AM
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Lt1 spark advance Hey I'm just wondering what people are getting at WOT on a close to stock setup. My lt1 would get knock retard at anything above 28* in the 4000-4800rpm range and above that I can get around 31*.
This is with a 13.5:1 AFR. I always run 94 octane is this normal for it seems low compared to some other LT1's but the distance/time calculator on datamaster says its doing 0-60mph in 5.4s which is good.
Originally I thought it was false knock because it kept yapping at the same rpm but after dropping my spark advance to 28* in that area and desensitizing the knock sensor a bit it's eliminated it completely.
Just wknte
This is with a 13.5:1 AFR. I always run 94 octane is this normal for it seems low compared to some other LT1's but the distance/time calculator on datamaster says its doing 0-60mph in 5.4s which is good.
Originally I thought it was false knock because it kept yapping at the same rpm but after dropping my spark advance to 28* in that area and desensitizing the knock sensor a bit it's eliminated it completely.
Just wknte
04-17-2013, 01:57 PM
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13.5:1 Is on the lean side for making good power. Generally speaking LT's tend to make best power from 12.7-13.1:1. That could be part of the reason you are dealing with spark knock.
04-18-2013, 06:40 PM
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Hey I'm just wondering what people are getting at WOT on a close to stock setup. My lt1 would get knock retard at anything above 28* in the 4000-4800rpm range and above that I can get around 31*.
This is with a 13.5:1 AFR. I always run 94 octane is this normal for it seems low compared to some other LT1's but the distance/time calculator on datamaster says its doing 0-60mph in 5.4s which is good.
Originally I thought it was false knock because it kept yapping at the same rpm but after dropping my spark advance to 28* in that area and desensitizing the knock sensor a bit it's eliminated it completely.
Just wknte
This is with a 13.5:1 AFR. I always run 94 octane is this normal for it seems low compared to some other LT1's but the distance/time calculator on datamaster says its doing 0-60mph in 5.4s which is good.
Originally I thought it was false knock because it kept yapping at the same rpm but after dropping my spark advance to 28* in that area and desensitizing the knock sensor a bit it's eliminated it completely.
Just wknte
