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Old 04-14-2012, 11:13 PM   #113
hairtrigger
 
Drives: 69 Chevelle SS396 2013 ZL1
Join Date: Mar 2010
Location: West
Posts: 670
Quote:
Originally Posted by Pgoldston View Post
No reason to put 4.10s in it. By my math with the current setup they can run about 140-145 before they would need to get into 5th. Running the 4.10s would force them into 5th and drop the rpm down around 5000 rpm.

I think the 3.73s with the 28 inch almost 29 inch tall tire is about perfect for that car. It makes enough low to mid range torque to pull mid 1.5 60's if not better.
4.10 is the perfect ratio with 28.9 tires. They are crossing the stripe at 5745 with the 3.73's. With 4.10's they will be crossing the stripe at 6200 at 130 MPH with a 1:1 trans gear.
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