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04-22-2008, 05:12 AM
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#1
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what rpm are you running with your gears
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Registered User
Join Date: Apr 2008
City: krum
State: Texas
Posts: 59
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iam looking to change my 3.31's to either 3.73's or 4.11's i was just wondering what rpm people where running in the new gt's with these gears.
70---???
80---???
thanks
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Mustangs are not an obsession they are a way of LIFE!!!
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04-22-2008, 08:17 AM
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#2
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Re: what rpm are you running with your gears
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 26,868
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around 70-75 I am pushing right at 2k rpms with 3.55s. Not sure what the final drive is off the top of my head for the T-56 in the 03/04 cobras.
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2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
Polished Borla Stingers, MGW Shifter, JLT CAI, SS Inserts, MM FLSFC, MM CC Plates,
10th Anniv Brakes, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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04-22-2008, 08:56 AM
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#3
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Re: what rpm are you running with your gears
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Deranged
Join Date: Jan 2005
City: Largo
State: Florida
Posts: 5,868
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at 75 MPH I'm turning 2000 RPM with 3:73
Damn it !!!! My mistake at 70 MPH it's 2000 at 75 MPH it's 2200
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Mods-MAc CAI , True Dual Flowmaster 40,3.73 ,T-Lok, 25% UDP, 3/8 Phenolic Intake Spacer ,Steeda Tri-ax, SCT Chip/ Tune
Last edited by Herbstang; 04-23-2008 at 08:35 AM.
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04-22-2008, 02:27 PM
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#4
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Re: what rpm are you running with your gears
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WTF^^...
Join Date: May 2003
City: Hoover / Florence
State: Alabama
Posts: 26,868
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I think im wrong, I think its lower than that let me get back to you
__________________
2003 REDFIRE COBRA #3938 of 5082 @ 05/27/2003 1 of 414
Polished Borla Stingers, MGW Shifter, JLT CAI, SS Inserts, MM FLSFC, MM CC Plates,
10th Anniv Brakes, SS Lines, H&R Race springs, IRS Brace, MRT Hood Struts
ME.com Member #29 - 400rwhp/380rwtq
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04-22-2008, 10:29 PM
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#5
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Re: what rpm are you running with your gears
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Registered User
Join Date: Nov 2007
City: brighton
State: Colorado
Posts: 480
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2150 with 3.45 @ 70mph
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94 v6, Stage 1, 2 & 3, mixed:
Current mods: CAI, UDP's, MagnaFlow cat back dual out, new engine (6k), 3.45s and traklok!!
Soon to be mods:SSM stage 3 splitport swap, 11+psi, weight reduction.
Very soon mods: Vortech V-2 supercharger (4-6psi), port and polished TB, 70mm MAF & 19# injectors.
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04-22-2008, 10:53 PM
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#6
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Re: what rpm are you running with your gears
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milf hunter
Join Date: Apr 2005
City: Baton Rouge
State: Louisiana
Posts: 5,037
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seriously? damn thats pretty good
i turn 2k at 70 on stock 3.27s
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04-22-2008, 11:12 PM
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#7
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Re: what rpm are you running with your gears
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Registered User
Join Date: Nov 2007
City: brighton
State: Colorado
Posts: 480
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differnt trans with different ratio. t5 lower geared 5th gear
__________________
94 v6, Stage 1, 2 & 3, mixed:
Current mods: CAI, UDP's, MagnaFlow cat back dual out, new engine (6k), 3.45s and traklok!!
Soon to be mods:SSM stage 3 splitport swap, 11+psi, weight reduction.
Very soon mods: Vortech V-2 supercharger (4-6psi), port and polished TB, 70mm MAF & 19# injectors.
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04-22-2008, 11:24 PM
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#8
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Re: what rpm are you running with your gears
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milf hunter
Join Date: Apr 2005
City: Baton Rouge
State: Louisiana
Posts: 5,037
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obviously........i didnt know it was that big of a difference though
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04-22-2008, 11:28 PM
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#9
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Re: what rpm are you running with your gears
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Registered User
Join Date: Nov 2007
City: brighton
State: Colorado
Posts: 480
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sorry, my bad...  i lack the filter most people have of what they say or type.
__________________
94 v6, Stage 1, 2 & 3, mixed:
Current mods: CAI, UDP's, MagnaFlow cat back dual out, new engine (6k), 3.45s and traklok!!
Soon to be mods:SSM stage 3 splitport swap, 11+psi, weight reduction.
Very soon mods: Vortech V-2 supercharger (4-6psi), port and polished TB, 70mm MAF & 19# injectors.
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04-23-2008, 05:30 AM
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#10
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Re: what rpm are you running with your gears
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Registered User
Join Date: Apr 2008
City: krum
State: Texas
Posts: 59
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cool my 93 5 liter turns 3400 rpm at 75 with 3.73's but i am also running a t5 out of a 84 thunderbird turbo 4cyl. so i dont mind getting worse mileage i just dont want to go as extreme as the 5 liter. so i would like to stay around 25-2600 rpm at 75 i am at 2k with 3.31's so what gears would you recomend?
__________________
Mustangs are not an obsession they are a way of LIFE!!!
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04-23-2008, 08:01 AM
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#11
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Re: what rpm are you running with your gears
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Registered User
Join Date: Apr 2008
City: mishawaka
State: Indiana
Posts: 206
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from what ive seen the 3650 and the t56 have the same final gear (.62). and i run 75@ 2000 and 95@2500 with the stock 3.27
gear ratios are just that... ratios... so all you have to do is take your rpm at any give speed and multiply it by the difference in the ratios
IE... if i go 75mph at 2000rpms with 3.27's then with 4.10s i will be at 2000(4.10/3.27)=2500 rpms
so if you know your own speed at an RPM then you can figure it out...
oh yeah... if your running an auto you have to make sure your torque converter is locked up or youll get funky readings!!!
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04-23-2008, 08:07 AM
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#12
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Re: what rpm are you running with your gears
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Registered User
Join Date: Apr 2008
City: mishawaka
State: Indiana
Posts: 206
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you can search for calculators and find them all day long... or ive actually made them in excel
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