Off to Byron today. Hoping for a low 13.
05-16-2010, 09:42 PM
#3
Re: Off to Byron today. Hoping for a low 13.
sadly, apparently the spark retard wasn't because of the exhaust leak. Tight as a button, but still pulling 5* for some reason.
Its fine on the first gear up until about 5500 or so, then the PCM starts pulling 5* timing, and keeps it pulled throughout the entire run. The Knock Counts only increase in the 5700+ range. Its a repeatable pattern in every datalogged run I have.
The better air brought my 1/8th ET down and gave me an extra 1mph on average in the 1/8th mile. However my 1/4 mile trap speeds were down about 1mph on average.
60 foots dropped from 2.1x to 2.0x, with one 1.9 60 footer.
New best is a 13.504 @ 101.7mph. Previous best in worse air with an exhaust leak was a 102.67mph. I should have been trapping HIGHER thanks to the denser air, but instead I was 1mph down. Opening the cut-out made ZERO difference in trap speeds or ET.
Engine temps were a consistent 185* or so. With one or two run's going in the 195* range because I had to idle at the line for a long time and didn't want to shut the engine down and have to make a run in Open Loop.
Its fine on the first gear up until about 5500 or so, then the PCM starts pulling 5* timing, and keeps it pulled throughout the entire run. The Knock Counts only increase in the 5700+ range. Its a repeatable pattern in every datalogged run I have.
The better air brought my 1/8th ET down and gave me an extra 1mph on average in the 1/8th mile. However my 1/4 mile trap speeds were down about 1mph on average.
60 foots dropped from 2.1x to 2.0x, with one 1.9 60 footer.
New best is a 13.504 @ 101.7mph. Previous best in worse air with an exhaust leak was a 102.67mph. I should have been trapping HIGHER thanks to the denser air, but instead I was 1mph down. Opening the cut-out made ZERO difference in trap speeds or ET.
Engine temps were a consistent 185* or so. With one or two run's going in the 195* range because I had to idle at the line for a long time and didn't want to shut the engine down and have to make a run in Open Loop.
05-17-2010, 01:11 AM
#4
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Car: 1989 Camaro IROC-Z
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Re: Off to Byron today. Hoping for a low 13.
Since you are having timing pulled due to know issues have you upgraded to an LT4 knock module?
05-17-2010, 09:17 AM
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Car: 87 GTA
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Re: Off to Byron today. Hoping for a low 13.
Are you running roller rockers? Whats total timing at, definetly shouldnt have a problem if its 34* or less
05-17-2010, 01:03 PM
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Car: 91 RS
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Re: Off to Byron today. Hoping for a low 13.
sounds like you could ahve a few issues there going on??? my first thought is check the knock sensor... the other one is waht was mentioned already 2.. what kind of gas u running???
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