just got back from the dyno and im PISSED....
04-17-2010, 08:11 AM
#11
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Join Date: Aug 2007
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i have HT0's that dont even have 1k miles on them... i bought them pre gapped for the nitrous, i just pulled one out and checked it, it was around .035ish gap.. and just because im curious.. how would blow by make the PCM want to pull timing? i have one of those inline air compressor filters (w/ out the little filter in it) on the drivers side in place of the stock hose that ran from intake manifold to the valve cover.. if you pm me your email address i can send you the pics of how it is currently setup.
Last edited by RSKtakR; 04-17-2010 at 08:48 AM.
04-17-2010, 12:02 PM
#14
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Join Date: Oct 2009
Location: Oregon
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To be fair, the engine doesn't really know when you're spinning the tires or not. It just has wheel speed to go on. Maybe the dyno clutch isn't fully engaging right away and when he floors it, your wheel speed increases quickly enough to simulate traction loss.
04-17-2010, 12:08 PM
#15
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but how would that pull timing if the trac control is turned off?
04-17-2010, 04:04 PM
#17
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i dont know if it was off for sure.. i will find out for sure Monday though... i would guess it was since this isnt the first s197 he has tuned.. but im just guessing, and i didnt think about it lastnight on the dyno.
04-17-2010, 04:06 PM
#18
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Location: Florida
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as long as traction control is off that's not it. if traction control was on it would be comparing the front tire speed to the rear and if there's a difference it'll start to try and slow the rear wheel speed through the timing or whatever it's set up to do.
.035 gap sounds a little high but for NA it's probably fine. either way the gap would effect the AF ratio if anything, not the timing.
have you tried loading another tune and seeing if the timing gets pulled up top? the only thing I can think of is that there's something wrong in the tune and there's some option selected somewhere that's getting overlooked.
.035 gap sounds a little high but for NA it's probably fine. either way the gap would effect the AF ratio if anything, not the timing.
have you tried loading another tune and seeing if the timing gets pulled up top? the only thing I can think of is that there's something wrong in the tune and there's some option selected somewhere that's getting overlooked.
04-17-2010, 04:14 PM
#20
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Join Date: Aug 2007
Posts: 123
as long as traction control is off that's not it. if traction control was on it would be comparing the front tire speed to the rear and if there's a difference it'll start to try and slow the rear wheel speed through the timing or whatever it's set up to do.
.035 gap sounds a little high but for NA it's probably fine. either way the gap would effect the AF ratio if anything, not the timing.
have you tried loading another tune and seeing if the timing gets pulled up top? the only thing I can think of is that there's something wrong in the tune and there's some option selected somewhere that's getting overlooked.
.035 gap sounds a little high but for NA it's probably fine. either way the gap would effect the AF ratio if anything, not the timing.
have you tried loading another tune and seeing if the timing gets pulled up top? the only thing I can think of is that there's something wrong in the tune and there's some option selected somewhere that's getting overlooked.
the timing would start out at 30 and then drop to 17-18 degrees when he would floor it. you could hear the difference in the car when he floored it when the timing started being pulled and you could hear when it went back upto 30 as well.