Tuning question, can someone help find the answer.
Thread Starter
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Joined: Dec 2001
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From: Ft. Lauderdale, FL, USA
Tuning question, can someone help find the answer. If I'm getting major pinging/marbles-sound (suspected detonation) from my motor at WOT, but no KR showing from ATAP, what could it be?
Misfire????
I show 11 degrees of KR at part throttle with no more than 15% throttle position.
Timing is set at 26 degrees.
Motor is in sig., none nitrous motor.
Thanks
Misfire????
I show 11 degrees of KR at part throttle with no more than 15% throttle position.
Timing is set at 26 degrees.
Motor is in sig., none nitrous motor.
Thanks
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Joined: Nov 2001
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From: College Station, Tx
Re: Tuning question, can someone help find the answer. I am assuming the PCM is tuned - it is possibly that a cap has been set on timing retard at high rpm - this would be my guess from what your description is.
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
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From: Ft. Lauderdale, FL, USA
Re: Tuning question, can someone help find the answer.
I am assuming the PCM is tuned - it is possibly that a cap has been set on timing retard at high rpm - this would be my guess from what your description is.
When you say "cap", do you mean I need more timing at WOT?
Can the PCM be set for different timing at different throttle positions?
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From: College Station, Tx
Re: Tuning question, can someone help find the answer. The amount of timing that is pulling out can be limited - it sounds like he is doing this for higher rpm ranges.
As long as you aren't running out of fuel (fuel volume dropping / injectors at 100%DC), you aren't burning a tremendous amount of oil, and your compression is reasonable for pump gas then it is probably the tune.
As long as you aren't running out of fuel (fuel volume dropping / injectors at 100%DC), you aren't burning a tremendous amount of oil, and your compression is reasonable for pump gas then it is probably the tune.
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Re: Tuning question, can someone help find the answer.
The amount of timing that is pulling out can be limited - it sounds like he is doing this for higher rpm ranges.
As long as you aren't running out of fuel (fuel volume dropping / injectors at 100%DC), you aren't burning a tremendous amount of oil, and your compression is reasonable for pump gas then it is probably the tune.
As long as you aren't running out of fuel (fuel volume dropping / injectors at 100%DC), you aren't burning a tremendous amount of oil, and your compression is reasonable for pump gas then it is probably the tune.
