Quote:
Originally posted by 1jimmy__d
just wondering the difference in 1/4 mile times (if any) between these two gears. my 89 had 3.73's and my 90 has 3.55's. with all the mods my 90 has, the 89 feels so much more quicker throught first and second gear. itt actually throws you back in the seat pretty good. the 90 with 3.55's doesnt feel as quick to me from start. i know the 90 should kill the 89, but does anyone know if there is a difference between the gears in the 1/4 mile? if so, i may switch to 3.73's thanks-
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3.73s are a little quicker than 3.55s...but I've had both & you can't tell that much of a difference. I think the difference that you are feeling is that the car you bought with the Holley Systemax combo on it with heads/cam/intake...your powerband has changed. Your '89 with the stock motor in it produces tons of torque and can really snap your neck back when nailed at low rpms, especially with the 3.73s. Your new motor probably doesn't make as much torque as the '89 motor does at low rpms...between 1500-2500. But once you get the motor in the '90 up to 3000+rpms...that's when it makes all the power!
And obviously the power in the '90 motor continues on up way higher in the rpm range than the '89 stock 302, pulling hard to 6000rpms or maybe even a tad higher. 3.73s would better suit your Holley combination. Or if your car sees a lot of track time (1/4 mile) & not as much street use...you could go for the 4.10s.