Cylinder Volume, skew performance??
07-13-2005, 06:42 PM
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Cylinder Volume, skew performance?? I just noticed this field in my HPTuners software. Since I have a 393ci engine, the cylinder volume isnt correct. I dyno'd the car and the power is abnormally low on motor and Im wondering what affect the cylinder volume will have on my car, if any.
The car is tuned to a perfect 12.3 afr with around 29* timing.
Any input it greatly appreciated!
The car is tuned to a perfect 12.3 afr with around 29* timing.
Any input it greatly appreciated!
07-14-2005, 02:04 PM
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Cylinder volume messes up speed density. Speed
density still matters at higher RPM, when you have
unsteady-MAP conditions. Maybe not on the dyno.
You should put it right.
If the speed-density and MAF airflows disagree
too much you may see a MAF performance code.
12.3:1 is somewhat fat for NA and you would probably
see some improvement from a leaner setup. If you
need to keep it fat for power adder and have no
slicker way of bumping fuel only when needed, you
may just have to tolerate detuned NA performance.
density still matters at higher RPM, when you have
unsteady-MAP conditions. Maybe not on the dyno.
You should put it right.
If the speed-density and MAF airflows disagree
too much you may see a MAF performance code.
12.3:1 is somewhat fat for NA and you would probably
see some improvement from a leaner setup. If you
need to keep it fat for power adder and have no
slicker way of bumping fuel only when needed, you
may just have to tolerate detuned NA performance.