Went to the track today. I am just totally confused. Ran 4 runs, first one sucked, missed 3rd gear **** poor time just forgot about it. Second run much better. Ran 13.042 at 112.8 mph. I have a maft and also the timing tuner. Had the maft set at 0 and the timing tuner set at a total of +2* of advance. Here are the O2's with fuel cell of 22 and tpa of 100%, Knock Retard & Timing:

02B2S1, O2B1S1, KR, Timing
0.900, 0.935, 0, 20.5
0.920, 0.940, 0, 22.5
0.150, 0.950, 0, 30.0
0.905, 0.920, 0, 21.0
0.900, 0.950, 0, 22.5
0.900, 0.945, 0, 25.0
0.895, 0.950, 0, 26.5
0.905, 0.945, .9, 19.0
0.905, 0.950, 1.9, 20.0
0.910, 0.945, 1.7, 21.0
0.910, 0.955, 1.5, 22.5
0.915, 0.950, 1.3, 23.5
0.910, 0.950, 1.1, 19.5
0.925, 0.945, 1.0, 20.0
0.915, 0.945, 2.8, 18.5

3rd Run was 13.10 at 111.2mph. On this run, I set the maft wot to -2%lean and the timing tuner to +3*advance. Here is that data:

02B2S1, O2B1S1, KR, Timing
0.885, .90, 0, 18
0.895, .935, 0, 17
0.88, .93, 0, 21
0.885, .93, .6, 22.5
0.88, .935, .4, 25
0.87, .10, .3, 21
0.87, .935, .1, 22.5
0.90, .935, 0, 25
0.10, .935, 0, 31
0.885, .915, 0, 21.5
0.885, .935, 2.8, 19.5
0.90, .94, 2.5, 20.5
0.90, .94, 2.1, 22
0.905, .945, 1.8, 23
0.905, .07, 1.6, 20.5
0.905, .945, 3.2, 18.5
0.905, .94, 2.9, 19
0.905, .945, 2.5, 19.5

I know this is long but I really need some input. Do the O2's being where they are mean the car is running rich at WOT, Is this creating the knock retard and is this really enough advance? When looking at the rpms, the knock retard began in third gear through 4th gear. The car was loosing power at the top end, like it was missing or this knock retard.

I did manage one more run, NOT GOOD! Did my burnout (line lock works real good) then I saw smoke coming out from under the back of the drivers side of the hood. I thought this rather strange. Went to the line, lights come down, dump the clutch and the engine revs, car moves but no tire squeal. Engine reving big time. So much so, I didn't put the gas to the floor until I hit second gear. Got to the end and the godawful smell of clutch. Got in pits, parked it. Waited a few, then started and put car in reverse. Seemed car shuttered when letting out on clutch. Clutch smell took all afternoon before it let up. Still not really gone.

So, after all of this, what does anybody think I should do in tuning the car, please need some advise. And finally, what do you guys think my clutch issue is, is it going or what? Thanks for the responses and sorry this is so long.

<small>[ September 28, 2002, 10:20 PM: Message edited by: SS125 ]</small>

 

About your clutch.... sorry, but it is the beginning of the end.

About your tune:
Forget about the stock O2's, they mean nothing. As long as you are aroung .9 (+/- .5) you shouldn't worry to much.
The big problem that I see from your runs, is your timing. You are showing very little advance. The timing tuner will not show up on a-tap. Even though, your timing is still low. At WOT you should have a target timing (depending on IAT) hovering at least above 26. You are averaging around 21 for your timing advance.
The KR is actually not too bad. It gets a little nasty at the end of your 3rd run, but nothing too serious.
It is impossible to tell what the deal is without some more information, but I would say if your looking for a better time, look to your timing.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by NoGo:
<strong>About your clutch.... sorry, but it is the beginning of the end.

About your tune:
Forget about the stock O2's, they mean nothing. As long as you are aroung .9 (+/- .5) you shouldn't worry to much.
The big problem that I see from your runs, is your timing. You are showing very little advance. The timing tuner will not show up on a-tap. Even though, your timing is still low. At WOT you should have a target timing (depending on IAT) hovering at least above 26. You are averaging around 21 for your timing advance.
The KR is actually not too bad. It gets a little nasty at the end of your 3rd run, but nothing too serious.
It is impossible to tell what the deal is without some more information, but I would say if your looking for a better time, look to your timing.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">The IAT was 76.8* and 79.5* for those two runs. What should I do to advance the timing to where it should be? I have an M6 if that helps, what other information would you need?

 

I have seen an issue like this before, the PCM is going into low octane mode. Next tiem you go to th track, make sure you have a good tank of gas and then reset the PCM at the track. Make sure to auto tap the run, I think you will see more timing.

The computer setsinto low ocatane tables much too easy in my opinion.

Good Luck!

Ryan K.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ryan Karasek:
<strong>I have seen an issue like this before, the PCM is going into low octane mode. Next tiem you go to th track, make sure you have a good tank of gas and then reset the PCM at the track. Make sure to auto tap the run, I think you will see more timing.

The computer setsinto low ocatane tables much too easy in my opinion.

Good Luck!

Ryan K.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Ryan, I have only EVER used Shell 93 octane in my car. Sunday, I even stopped at a Sunoco Station on the way up there and put in $5.00 of Sunoco 94 octane. Is what you said still possible?
(I will shorten my sig btw, sorry

<small>[ September 30, 2002, 08:59 AM: Message edited by: SS125 ]</small>

 

Sometimes, the dreaded false knock will cause the PCM to shift to the low octane mode even when you run good gas.

Try to reset the PCM at the track and go from there.

Ryan K.