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» Northern California Ford Owners     » Automotive   » Tech Talk   » gearing for the quarter mile

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Author Topic: gearing for the quarter mile
1SLOWLX
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Member # 558

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I right now have 3.73. I want to get 26x10.5 mt et streets. In fourth gear what is the top speed at about 6000 rpms? I know my car is going to hit in the 120's and wondering if I should go with a bigger tire so I don't have to use fifth or drop the gear down? OR is it fine?
Albert

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Built Tuff with your stuff ;)
Posts: 5231 | From: bay area | Registered: Nov 2001  |  :
Stimson
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According to calculations 27.25 inch tires (how tall my 26 inch ET drags are with 3.73's in 4th gear at 6000 RPM is good for 130 mph. If they're a true 26 inches, then you're good until 124 mph.


A better fit would be 28 inch tires with 4.10's... good for a theoretical 122 mph @ 6K RPM, but you'll have a better launch.

Posts: 2373 | Registered: Jun 2000  |  :
JoeT
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heh, 4.30s on a stocker w/ 28" tires

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1984 Ford Tempo AOD--- RIP
Posts: 6785 | From: San Jose | Registered: Jun 2001  |  :
nitrous_bob
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you should be fine....i used 26" ET streets and got 112 MPH w/ 4.10's at about 5600

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5.0 OG since 1990
Posts: 1402 | From: st clair shores MI | Registered: Nov 2000  |  :


 
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