2nd Generation Specific 1986-1992 Discussion

stupid tuning info

Old 10-02-2006, 10:58 AM
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so i put the wideband on the 91 yesterday, intake, cat back, other than that its 100% stock



stock, it was about [email protected], gradually dropping to [email protected], which is the shift point for the a/t, i figure the duty cycle is around 80%.



i leaned it out 6%, pretty much across the board, its now in the upper mid 12's @4k, dropping to about [email protected]



seat of the pants says it pulls a little harder from 4500-6500...
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Old 10-03-2006, 12:40 AM
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is this a NA car?? the stock ecu limits duty cycle to about 65%, and on a NA it doesnt run close to that high either... but the NA do run pretty rich stock...



what are u using a safc??
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Old 10-03-2006, 10:07 AM
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Originally Posted by KompressorLOgic' post='839387' date='Oct 2 2006, 10:40 PM

is this a NA car?? the stock ecu limits duty cycle to about 65%, and on a NA it doesnt run close to that high either... but the NA do run pretty rich stock...



what are u using a safc??


i dont know what duty cycle actually is, but from the ITS car i have a pretty fair idea of what the bsfc and hp is/are, and thats how i'm coming up with those numbers. educated guess though



i'm using an f-con+gcc, its eventually going turbo
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Old 10-03-2006, 09:34 PM
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you know i have a FCON layin around, ( used to use it, ran a **** load of boost on stock injectors and it held for quite a while was a really high milage t2 block )





but ive allways wondered how far up the FCON can increase the duty cycle, can it go beyond the stock 65% limit on the stock ecu???
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Old 10-04-2006, 09:31 AM
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Originally Posted by KompressorLOgic' post='839513' date='Oct 3 2006, 07:34 PM

you know i have a FCON layin around, ( used to use it, ran a **** load of boost on stock injectors and it held for quite a while was a really high milage t2 block )

but ive allways wondered how far up the FCON can increase the duty cycle, can it go beyond the stock 65% limit on the stock ecu???


fcon appears to take the injector duty cycle and modify it. 0 is 0, 1-9 modify the fuel curve in .5 afr increments (give or take, kinda depends on mods...), i think the fcon can go to 100% it drives the injectors directly. you can, or could get the chips custom burned, or get the GCC and change the curve a little
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