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Old 01-04-2014, 06:23 AM   #1
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How many RPMs are you running in manual at 70

I have 331 Gears and it's 70 I am running 1950 RPM. What rpm's are you guys with 373 irunning?
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Old 01-04-2014, 07:23 AM   #2
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I have 3.73. 2100 at 70 mph in 6th gear.
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Old 01-04-2014, 09:47 AM   #3
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I have 3.73. 2100 at 70 mph in 6th gear.
Same as this guy.
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Old 01-04-2014, 11:29 AM   #4
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Same as this guy.
Thank you not much difference
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Old 01-04-2014, 11:38 AM   #5
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Same as this guy.
Thank you not much difference
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Old 01-04-2014, 11:43 AM   #6
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Originally Posted by Gordito View Post

Same as this guy.
Do you ever feel that your gears are too low driving around. Sorry I know the subject has been covered many times. Not sure if I want to swap my gears two 355's or 373's
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Old 01-04-2014, 01:05 PM   #7
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Well, what do you mean by too low for driving around? First gear is really short - you could ignore it and just use 2nd all day if you prefer. For daily driving I don't see it being that much different than your other ratios.

For playing around, though, I think most agree 373 is the way to go unless you are forced induction (where you'd want a 315 or something)
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Old 01-04-2014, 01:08 PM   #8
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3.31 to 3.55 would be a waste. You won't even feel the difference.
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Old 01-04-2014, 01:14 PM   #9
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Quote:
Originally Posted by DDTCM
3.31 to 3.55 would be a waste. You won't even feel the difference.
+1. I went 3.55 to 3.73 and it was a waste. Either going 3.90 or 4.10. This is my 03 cobra. Not the same car but gear results are similar.
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Old 01-04-2014, 01:45 PM   #10
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3.31 to 3.90 or 4.10 will grab you in the boo boo. You will feel a real seat of the pants difference.
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Old 01-04-2014, 02:22 PM   #11
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Consider 4:10 or 4:56. 2300 RPM's are fine.
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Old 01-04-2014, 02:24 PM   #12
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How many RPMs are you running in manual at 70

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Originally Posted by robb15033 View Post
Consider 4:10 or 4:56. 2300 RPM's are fine.

Not a good idea with the MT82, you will be shifting every couple seconds, now if you didn't mind trapping the 1/4 mile in 5th gear it will be fast, but if you do any more power mods it will honestly be to much.
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Old 01-04-2014, 08:12 PM   #13
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I would not go higher than 3.73 but not sure if that would be an improvement at the drag strip and street. I'm able to launch my stock 3.31 geared mustang easily on the strip and street. My best run is in the 12's. Would I tell a difference with 3.55 and still maintain traction for a launch on street tires?
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Old 01-05-2014, 12:59 AM   #14
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Not a good idea with the MT82, you will be shifting every couple seconds, now if you didn't mind trapping the 1/4 mile in 5th gear it will be fast, but if you do any more power mods it will honestly be to much.
OK, got ya.
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Old 01-05-2014, 01:24 AM   #15
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I would not go higher than 3.73 but not sure if that would be an improvement at the drag strip and street. I'm able to launch my stock 3.31 geared mustang easily on the strip and street. My best run is in the 12's. Would I tell a difference with 3.55 and still maintain traction for a launch on street tires?
You will most likely notice a bit of wheel spin which can actually cut your time down a bit. What is really best for the 11+ 5.0 auto is to stick with 3.31 gears and just upgrade your torque converter. Much better results.
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Old 01-07-2014, 09:02 AM   #16
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You will most likely notice a bit of wheel spin which can actually cut your time down a bit. What is really best for the 11+ 5.0 auto is to stick with 3.31 gears and just upgrade your torque converter. Much better results.
I'm running a manual
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Old 01-07-2014, 01:09 PM   #17
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Google "RPM calculator"

MT82 gear ratios are:

3.66
2.43
1.69
1.32
1.00
0.65

Plug in your gear ratio, final drive ratio (.65), tire diameter and the speed you will be going and voila. You can see what any possible imaginable combo will be turning.

Interwebs knows all.
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Old 01-07-2014, 04:52 PM   #18
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Originally Posted by scottydsntknow View Post
Google "RPM calculator"

MT82 gear ratios are:

3.66
2.43
1.69
1.32
1.00
0.65

Plug in your gear ratio, final drive ratio (.65), tire diameter and the speed you will be going and voila. You can see what any possible imaginable combo will be turning.

Interwebs knows all.
Thank you
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