th350 and 4.30's
08-06-2008, 06:20 PM
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th350 and 4.30's I've used all these different sites that tell you how to figure max mph and it says I should run a max mph of 124mph @ 6400rpm with a th350/4000stall/4.30's/28" tires. But, I am maxing out well before the finish line and it's no where even close to 124mph. What gives? Can these calculators be that far off?
08-08-2008, 08:36 PM
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From a 4.11 to 4.30 is like only 150rpm. 4.11 to 4.56 is like 325rpm. I just went threw all this. And im running a glide with a 1.76 gear, 9in, 3.50 gear, and 28w tires and im crossing at 6100 off the nos. With the 4.30 im crossing at 6800 off the nos. In the old car i had a th400, 4000, 4.56, and 26" tire. I was crossing at around 6850. With my 315's on, it would not finish the 1/4. Hitting rev. Thos were 25". Anyway, hope this help ya.
08-09-2008, 12:04 AM
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Your setup would be good for 1/8th mile.
With a th350, 3.70 gears, 27" tire, 6300 rev limiter my car will tag the rev limiter right before the line in the 1/4. Can fix that two ways. Run a 28" tire or bump the rev limiter up a little.
Have seen several people do this combo for the 1/4. th350, 4.10 gears, 28" tire, 6700 rev limiter.
Thats why you'll see cars at the track with 4.56/5.xx gears running 30+" tires.
With a th350, 3.70 gears, 27" tire, 6300 rev limiter my car will tag the rev limiter right before the line in the 1/4. Can fix that two ways. Run a 28" tire or bump the rev limiter up a little.
Have seen several people do this combo for the 1/4. th350, 4.10 gears, 28" tire, 6700 rev limiter.
Thats why you'll see cars at the track with 4.56/5.xx gears running 30+" tires.
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08-09-2008, 01:08 AM
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Thanks for the input guys. I took it back to the track tonight to run the 1/8th mile jackpot race and it run a best pass of 7.41@92mph with a 1.58 60ft foot braking it from 3000rpm.
I did make a couple of passes all out and it would make it almost exactly to the 1000ft at 65-6600rpm where I was getting out of it and coasting to a 11.71@92mph. I'm thinking 3.89's would be about right.
I did make a couple of passes all out and it would make it almost exactly to the 1000ft at 65-6600rpm where I was getting out of it and coasting to a 11.71@92mph. I'm thinking 3.89's would be about right.
