5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

gears and RPM's

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Old 12-29-2005, 04:42 PM
  #1  
JoHnNy sAvAgE
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Default gears and RPM's

Hey I was wondering about what RPM would 3.73's be at when going about 70MPH? I am going to get some gears and was just wondering wether to go 3.55's or 3.73's ? I really want 3.73's for the acceleration, but I still want to hold my own on the freeway. want to be able to hit atleast 120 with no problem(close to red line)
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Old 12-29-2005, 05:04 PM
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88BlueGT
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Default RE: gears and RPM's

You will have no problem hitting 120 w/ 3:73's. Any mods?
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Old 12-29-2005, 06:35 PM
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JoHnNy sAvAgE
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Default RE: gears and RPM's

just added my mods to my signature...

so what RPM do you think I would be at going 70MPH? Do you have 3.73's?
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Old 12-29-2005, 08:30 PM
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86HOGT
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Default RE: gears and RPM's

I think I'm at 2400 doing 70.
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Old 12-29-2005, 08:44 PM
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luckythirteen13
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Default RE: gears and RPM's

about 2400-2500. i do 90mph at 3k
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Old 12-29-2005, 09:05 PM
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JoHnNy sAvAgE
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Default RE: gears and RPM's

so I think I'll for sure do 3.75's 90 at 3k then I would say 120 maybe at 4.5k

how much differance do you think there is between the 3.55 and the 3.73 not much huh?
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Old 12-29-2005, 10:03 PM
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Quik
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Default RE: gears and RPM's

355s with 27' tall snow tire
60mph at 2k rpms

[speedo is off some with taller tires sot its about 65mph at 2k with a 26' tire]
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Old 12-30-2005, 12:30 PM
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Cain8768
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Default RE: gears and RPM's

here ya go

http://www.tchracing.com/tech/gearcalc.php
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