I need to flash my Corvette ECM to make it think its an FBODY...help please
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Staging Lane
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I need to flash my Corvette ECM to make it think its an FBODY...help please
I need to flash the ECM of a 2002 Corvette C5 so that it will work in my 1984 C4 Vette.
the C5 corvettes had the speed sensor on the rear differential, but my speed sensor is on the tailshaft of the 4L60e.
From another source I know I need to change the following 3 commands. But what else do I need to change. Right now my ECM thinks the speed is a lot higher than it is and doesn't shift gears appropriately.
command .....................................Vette / Fbody
Ho101 vss pulses per km...............19279 / 65000
Ho102= vss pulses per revolution ..... 12.6836 / 40
Ho104= trans output shaft rev/ km ..... 519.98 / 1625.12
the C5 corvettes had the speed sensor on the rear differential, but my speed sensor is on the tailshaft of the 4L60e.
From another source I know I need to change the following 3 commands. But what else do I need to change. Right now my ECM thinks the speed is a lot higher than it is and doesn't shift gears appropriately.
command .....................................Vette / Fbody
Ho101 vss pulses per km...............19279 / 65000
Ho102= vss pulses per revolution ..... 12.6836 / 40
Ho104= trans output shaft rev/ km ..... 519.98 / 1625.12
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Staging Lane
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I want to make sure that the transmission shifts properly and everything else is corrected.
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Staging Lane
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Russ,
I know my tire size, and when you say gear ratio...you mean the rear differential right? I have a Dana 36.
Rear axle ratio for stock 84 Dana 36 was 3.07
Everyone else...if I had done this before, "change to fbody" would make sense....but I don't want this guy screwing it up again, can you be very specific which parameters change? Is it just the three above?
Last edited by The Plastic Lizard; 06-07-2015 at 08:48 AM. Reason: Add data
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Thanks everyone...
Russ,
I know my tire size, and when you say gear ratio...you mean the rear differential right? I have a Dana 36.
Rear axle ratio for stock 84 Dana 36 was 3.07
Everyone else...if I had done this before, "change to fbody" would make sense....but I don't want this guy screwing it up again, can you be very specific which parameters change? Is it just the three above?
Russ,
I know my tire size, and when you say gear ratio...you mean the rear differential right? I have a Dana 36.
Rear axle ratio for stock 84 Dana 36 was 3.07
Everyone else...if I had done this before, "change to fbody" would make sense....but I don't want this guy screwing it up again, can you be very specific which parameters change? Is it just the three above?
Russ Kemp