3.15 or 3.31 for a mt82 roush tvs mustang

[phantom_5_liter]

Anyone have the 3.15 gears on their supercharged coyote? I have both gears but don't know which one is best because I'm gonna be doing freeway pulls and 1/4 pulls

 

[mebcop]

With a TVS and 305/35/19 NT05r's I reach 133 in 4th gear in the quarter, and I only rev to like 7100rpms. I know the tvs likes the longer gears but the 3.15's might be a little tall, unless you're really pushing some power. You're rear tire height should also be weighed in to your decision.

BTW: my nittos are about 27.5" tall.

 

[phantom_5_liter]

I have 315/40/18 and gonna go to a 15x10 with a 26 inch tall tire
Would that he too much? Btw I'm at 654 to the wheels AED tunned

 

[mebcop]

Use one of the tire/gearing calculators to find out how fast you can go in 4th gear, and make sure you don't have to shift to 5th is my suggestion.

 

[mebcop]

With 3.31's and a 26" tall tire, at 7500rpms you will be at 133mph in 4th.

3.15's will take you to 140mph.

I don't know what you rev to