3.9 or 4.11 diff??

[LETZRIDE]

as long as you are going to stay N/A 4.11's are fine than...if you go F/I that gear will be too short

 

[GRPABT1]

Turbo's need lower ratios to help load the motor and spool the turbo but superchargers still run well with the same gears as NA motors. If you go drag racing then basically you wanna pick a ratio that puts you as close top revs over the line in 1:1 ratio gear (3rd for auto, 4th for manual) without limiter bashing.

 

[SlvrR8]

Yeah true ATM I cross the line in forth but only probably around4000-4500rpm not 100% sure.

 

[SlvrR8]

Wait no it should be higher rpm than that I think..

 

[GRPABT1]

With 4.11's I am crossing the line somewhere around 6000rpm (factory tacho lol). It's up there somewhere but not enough to light up the shift light which is set to about 6900. That's at 117mph.

 

[SlvrR8]

117 nice what mods do u have?? My best et is 13.6 at 105.

 

[GRPABT1]

It's a very long list lol. I'll make a build thread one day...

 

[SlvrR8]

Haha fair call

 

[STEEV888]

4.11's you will love em.

 

[SlvrR8]

Thanks mate yeah I'm definitely sold on 4.11s now. Hopefully next month I'll go get my car( 200km away in old mans shed) do the diff and also gonna nolathane it