stock advance?
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its pretty easy if u can burn your own EPROMs, u just type in a few numbers on the software, burn a chip, pull out the old one, and put the new one in.
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Originally Posted by Formula350
I retarded mine around 2-3º across the board and it seems like my pinging went down. Was nice.
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Originally Posted by dhdenney
OK didn't know you could do that. Actually, I've never known anyone to be able to burn chips.
Originally Posted by LiENUS
If you are hearing pinging then somethings wrong, even with 87 octane you shouldn't be hearing any ping at all.
You can most definitely get pinging if you run 87 in these engines under hard acceleration with the timing stock or advanced any. Might want to read your owners manual.
Originally Posted by LiENUS
I advanced mine 5 degrees at cruising and 2 degrees at WOT and hear no pinging at all. Your knock sensor is probably dead
Also, if the knock sensor is dead, the computer goes into a safe mode and retards timing by an excessive amount which would probably mean you are less likely to get/hear any pinging in that circumstance.
Another thing, just because you don't "hear" any pinging doesn't mean you aren't getting knock. If the computer hears any knock from the sensor it retards timing almost instantly, in most cases faster than you will be able to hear it. So even if you advanced timing 10 degrees and didn't hear any pinging, that could just be because it retarded 8-9 degrees due to knock.
Basically, unless you preformed a data log to verify that you are actually not getting any knock at that setting, I would not recommend advancing the timing 5 degrees on a stock motor.
Last edited by infinitebird; Apr 16, 2007 at 03:36 PM.
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Originally Posted by infinitebird
You can most definitely get pinging if you run 87 in these engines under hard acceleration with the timing stock or advanced any. Might want to read your owners manual.
That doesn't mean that will work on all cars/engines. On two previous lt1 cars I had there was knock detected even at the stock timing level. This can result from any number of things including just simple old/worn out engine parts.
Also, if the knock sensor is dead, the computer goes into a safe mode and retards timing by an excessive amount which would probably mean you are less likely to get/hear any pinging in that circumstance.
Also, if the knock sensor is dead, the computer goes into a safe mode and retards timing by an excessive amount which would probably mean you are less likely to get/hear any pinging in that circumstance.
If the knock sensor is dead the computer does not detect any knock and does not pull any timing.
Another thing, just because you don't "hear" any pinging doesn't mean you aren't getting knock. If the computer hears any knock from the sensor it retards timing almost instantly, in most cases faster than you will be able to hear it. So even if you advanced timing 10 degrees and didn't hear any pinging, that could just be because it retarded 8-9 degrees due to knock.
Basically, unless you preformed a data log to verify that you are actually not getting any knock at that setting, I would not recommend advancing the timing 5 degrees on a stock motor.
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my knock sensor was taking about 1 degree out off the line for about a second, but that was because i was using 87 octane. i had a girl watch my scanner while i went down the track and she said it was at 1 for a second, flashed to 2 for an instant, then was ok on the top end, if that tells you anything. i think i will be more than ok when i put 92 in it
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Originally Posted by LT1Falcon
my knock sensor was taking about 1 degree out off the line for about a second, but that was because i was using 87 octane. i had a girl watch my scanner while i went down the track and she said it was at 1 for a second, flashed to 2 for an instant, then was ok on the top end, if that tells you anything. i think i will be more than ok when i put 92 in it
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Originally Posted by LiENUS
So you are really only interest in the initial knock retard up to the spike accompanying it, once the KR starts to go down you arent interest in those fields.
no, if i understand you right, i want to mess with the opposite, i want to add timing to the fields that are currently not knocking, but i figure once i start runnin 92 octane, i should be able to add a degree or 2 even the trouble areas (im guessin from about 1000 rpms to 3000 since i launch at idle).