Wondering if anyone knows apoxamitly what speed 4.10 top out at in 4th gear F-body. Looking to go to them without hitting 5th on the 1/4. Heads soon to have full porting/intake/cam/headers .
Thanks.

-Mark

 

Gear Calculator

 

Zepher's brother hit 155 at the top of 5th (~5500RPM) in his 4.10'ed M6 95 T/A.

IIRC...

 

whats the A4 gears OD is like what .67??? im wondering what 4.10s would be at 5500 rpm? 140+ mph? what about at say 3200 rpm in OD

 

I just need to know what the top speed with 4.10's in an m6 would be. Dont know all the gear ratio's for the Calculator.

 

need a redline or expected trap speed to give you one or the other.

 

At 6000 rpms you'll be running ~111 mph in 4th. With some tire stretch you could end up around 112.

If you're going with a really nasty cam/porting you'll probably lift the limiter farter than 6g's. At 6500 you'll be turning 121 mph.

I REALLY wouldn't worry about maxing 4th gear with 4.11's. Even if you pull and amazing run I'd wager you could hold redline for a second without any ET loss to speak of.

 

so in other words the 4.10's are a go?