4.10 top speed in 5 speed car - MustangForums.com



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Old 01-16-2012, 12:03 PM   #1
!KLeech!
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Default 4.10 top speed in 5 speed car

Like the title says, for those of you guys out there with a 5 speed and 4.10's whats the top speed you get out of 4th gear? My car should be down in the mid 12's this spring and I don't want 4.10's to be to much. I was originally going to go 3.90, but if I can run a 4.10 anf get away with it I will.
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Old 01-16-2012, 12:16 PM   #2
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All varies by the overall diameter of your rear wheel/tire combo,without that cant say fyi
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Old 01-16-2012, 12:37 PM   #3
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like uber said. heres cliffy's gear calculator should give you the answer you want

http://www.paladinmicro.com/pmicro.p...InGearCalc.htm
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Old 01-16-2012, 02:15 PM   #4
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108 mph at 6k rpm

mabe like 112 at 6200 rpm at rev limiter
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Old 01-16-2012, 03:09 PM   #5
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Quote:
Originally Posted by Andy13186 View Post
108 mph at 6k rpm

mabe like 112 at 6200 rpm at rev limiter
Theres no way to say that when u dont know his overall tire diameter out back.
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Old 01-16-2012, 03:13 PM   #6
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theyll be mickey thompson et streets, 275/40/17 aka a 25.661" tire. I used the gear calculator on summit and at 6k rpm it said 111.xx something I believe. I wasnt sure if this was dead accurate or not. Input?

sorry, shouldve included tire diameter in OP.
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Old 01-16-2012, 03:23 PM   #7
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Mine was 111 at 6250 rpms with 265/35/18s.
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Old 01-16-2012, 03:27 PM   #8
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Quote:
Originally Posted by uberstang1 View Post
Theres no way to say that when u dont know his overall tire diameter out back.
assuming stock diameter
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Old 01-16-2012, 04:38 PM   #9
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Yup, you will be right on the edge with 4.10 gears (depending upon how high you are willing to spin it). You should be trapping at around 6000-6300rpm depending upon how much power you are making. Remember that those rpms are hanging for a short while in 4th since you are gaining speed more slowly on the big end (not like the quick cycles thru 1st and 2nd).

I ran 4.10 with 275-40-17 tires and trapped as high as 112mph, but I didn't want to push it any more than that.

I do run 3.90 gears now, but that is due to the mph I gained with nitrous (118+mph).
If you are really in doubt, I'd get 3.90 so you still have room to grow a little.
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Old 01-16-2012, 08:24 PM   #10
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im running 4.10's with a 275/40/18 (~27" tire) and have my limiter set at 6800 so in theory my car will go as high as 128ish through the traps

im aiming for VERY high 10's with the new build on nitrous so we'll see how it does...
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