11-17-2022, 10:17 AM | #15 | |
Drives: Chevrolet Camaro LT1 Join Date: Sep 2022
Location: Alberta
Posts: 336
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Quote:
Jim G |
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11-17-2022, 11:46 AM | #16 | |
Drives: Chevrolet Camaro LT1 Join Date: Sep 2022
Location: Alberta
Posts: 336
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Quote:
But that starts to change IF I could somehow transfer about 90% of the car's weight to the rear axle, and have a high enough coefficient of friction on the tire (like 1.2). IF I could get 100% to the rear axle (i.e. if I could get the front wheels to unload completely), and if I had rear tires with a 1.20 friction coefficient (possible on a dragstrip I assume), I would pick up about 0.2 second in the 0-60 run, and therefore also 0.2 seconds in the quarter mile, by using 1st gear versus 2nd gear from the standing start. This would be the case despite the fact that there would STILL be some tire spin in 1st gear (but not in 2nd gear). Of course, I have no idea how I could get the front end to unload completely! But it's an interesting theoretical. Jim G |
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01-25-2023, 06:10 PM | #17 |
Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016
Location: US
Posts: 1,201
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The 8L90 does this unnecessarily hard 3-4 shift at low to mid throttle range also. It is only for the 3-4 upshift and it sometimes doesn't do it at lower transmission temperatures.
I think it is just bad calibrating, and HP Tuners and TCM tuning will do nothing to fix it. The only thing HP Tuners is useful for when "tuning" the TCM is changing shift scheduling and if you want to completely turn off all torque limiting (not change it just turn it off completely). We lack the necessary tables to do anything with the TCMs on these and the ones available in HP Tuners don't function. |
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