4 replies to this topic

[GMLXSS]

I already have a 9" in the hatch from the previous owner who use to drag race her.

I am not interested in the straight line and will only ever go to the odd track day once she's on the road again.

 

My question you you all - is it worth me spending money on replacing and modifying a lighter diff for track work or will some money spent on a Truetrac and billet axles etc. for the 9" be money better spent??

 

Cheers.

[Peter UC]

Leave the 9" there, they are still used extensively in circuit applications, if you want it lighter get a alloy centre, it brings the weight down to a comparable amount with a BW78 

 

Either that or spend the same money on better shocks to better control the weight.

Edited by Peter UC, 15 March 2018 - 11:37 AM.

[Rockoz]

Friend of mine used to build Sports Sedans.

Used 9 inch exclusively.

His other advantage with it was making the car left hand drive, off setting the drive train and using same length axles.

Gave the driver a bit more room.

But thats another story.

[GMLXSS]

Good to know guys - thanks for your advice.

[ozyozyozy]

9 inch all the way.
Dont bother with truetrac for circuit.
Use a wavetrac or a detroit locker, properly setup eg. Spring tension for locking is key.
If you have deeper pockets use a modena LSD, these are proper competition ramp and plate style.
Alloy carrier approx halves the weight of the centre section, doing this will bring diff weight prob lower than a borg warner.

Id higly recomend full floating hubs if or when money allows(this for any diffs when track use)

Edited by ozyozyozy, 16 March 2018 - 11:10 PM.