what gear ratio should i use?
02-11-2005, 10:36 AM
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what gear ratio should i use? I'm looking to buy a 12 bolt and i have a six speed car with about 500hp to the wheels a cam and 150shot. I had 4.10 gears in the stock 10 bolt, but now i've been told to run a 3.73 because i'm running nitrous now. I'm also going to be running a 26inch tire until i get new rims for the back to fit 28-10.5. I figure if i drop the gear i will gain some mph and drop my ET, so if anyone has some advice for me let me know please.
02-11-2005, 12:24 PM
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You're right that nitrous likes less gear & taller tires.
What's best will depend on the combination of everything about your car.
If 4.1:1 ratio was good for you NA, then I'd think 3.5:1 - 3.7:1 with the 28" tire would be great on the bottle.
The optimum shift RPM also usually drops when you're on the bottle, so you could also get benefit from short shifting as compared to NA runs.
What's best will depend on the combination of everything about your car.
If 4.1:1 ratio was good for you NA, then I'd think 3.5:1 - 3.7:1 with the 28" tire would be great on the bottle.
The optimum shift RPM also usually drops when you're on the bottle, so you could also get benefit from short shifting as compared to NA runs.
02-11-2005, 12:30 PM
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gears
Originally Posted by white2001s10
You're right that nitrous likes less gear & taller tires.
What's best will depend on the combination of everything about your car.
If 4.1:1 ratio was good for you NA, then I'd think 3.5:1 - 3.7:1 with the 28" tire would be great on the bottle.
The optimum shift RPM also usually drops when you're on the bottle, so you could also get benefit from short shifting as compared to NA runs.
What's best will depend on the combination of everything about your car.
If 4.1:1 ratio was good for you NA, then I'd think 3.5:1 - 3.7:1 with the 28" tire would be great on the bottle.
The optimum shift RPM also usually drops when you're on the bottle, so you could also get benefit from short shifting as compared to NA runs.
i'm going to be running the 26-10.5 for now, so do you think going with the 3.73 with still help me or should i stick with 4.10
02-12-2005, 12:02 PM
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i have a m6,head,cam and full bolt on car w/a t.n.t kit. i run 4.11's in my 12bolt w/26'' tires. i cross the traps at 6,300rpm's in 4th gear on the nos w/ a 6,800rev limiter. i had 3.73's before and the car went no faster on the nos from the 3.73's. my car is faster on the motor because i cut better 60's with the 4.11's. i'de keep the 4.11's. i'm wondering,where did you get the 500hp # from? did you dyno that? or is that what you think you'll have w/the nos? i dynoed at 519hp w/a 100 shot.
02-14-2005, 04:54 PM
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dyno #
Originally Posted by mike c.
i have a m6,head,cam and full bolt on car w/a t.n.t kit. i run 4.11's in my 12bolt w/26'' tires. i cross the traps at 6,300rpm's in 4th gear on the nos w/ a 6,800rev limiter. i had 3.73's before and the car went no faster on the nos from the 3.73's. my car is faster on the motor because i cut better 60's with the 4.11's. i'de keep the 4.11's. i'm wondering,where did you get the 500hp # from? did you dyno that? or is that what you think you'll have w/the nos? i dynoed at 519hp w/a 100 shot.
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02-14-2005, 07:38 PM
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Originally Posted by mike c.
i have a m6,head,cam and full bolt on car w/a t.n.t kit. i run 4.11's in my 12bolt w/26'' tires. i cross the traps at 6,300rpm's in 4th gear on the nos w/ a 6,800rev limiter. i had 3.73's before and the car went no faster on the nos from the 3.73's. my car is faster on the motor because i cut better 60's with the 4.11's. i'de keep the 4.11's. i'm wondering,where did you get the 500hp # from? did you dyno that? or is that what you think you'll have w/the nos? i dynoed at 519hp w/a 100 shot.
