gearing for 1/8 mile - 460 Ford Forum
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post #1 of 2 (permalink) Old 09-23-2010, 07:57 PM Thread Starter
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gearing for 1/8 mile

here is my info 68 1/2 ton long bed f-100 460 motor sport crate motor 550 hp as listed at 6200 rpm tremic trans 2.87 first gear, ladder bar with 31x18.5 tires, 95.5 inches of rollout, 3900 lbs with me, been looking at the calculator a 5.13 puts me at 1st 38mph 2nd 58mph 3rd 85mph 4th 109 and 5th 171 at 6200 with a sir of 14.72. i dont know how to figure out if i will be in 3rd or 4th at 6200 at the end of the track i would like to be at that rpm at the very top of one of those gear how do i figure this out maybe this is not the gearing for me but i want to take advantage of my overdrive.. its 70 mph in 5th at 2500 rpm with the 5.13 witch is perfect for me on the hwy. your sugestions or comparable set-ups would be helpful... had it to the track last year for the first time but they were not recording times so i dont have that info..it has a 4.11 in it now.

Last edited by jeffery2304; 09-29-2010 at 07:43 PM.
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post #2 of 2 (permalink) Old 09-29-2010, 07:46 PM Thread Starter
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Quote:
Originally Posted by jeffery2304 View Post
here is my info 68 1/2 ton long bed f-100 460 motor sport crate motor 550 hp as listed at 6200 rpm tremic trans 2.87 first gear, ladder bar with 31x18.5 tires, 95.5 inches of rollout, 3900 lbs with me, been looking at the calculator a 5.13 puts me at 1st 38mph 2nd 58mph 3rd 85mph 4th 109 and 5th 171 at 6200 with a sir of 14.72. i dont know how to figure out if i will be in 3rd or 4th at 6200 at the end of the track i would like to be at that rpm at the very top of one of those gear how do i figure this out maybe this is not the gearing for me but i want to take advantage of my overdrive.. its 70 mph in 5th at 2500 rpm with the 5.13 witch is perfect for me on the hwy. your sugestions or comparable set-ups would be helpful... had it to the track last year for the first time but they were not recording times so i dont have that info..it has a 4.11 in it now.
am i missing something here.....anybody have something similar?
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