Which rear end and why

[Amituk]

Hey guys..

I need a new rear end for my project so looking for thoughts and recommendations.

The plan is to run an LS9 motor at 600hp + and probably a tremec 6spd gear box.

What rear end would you run and why, and how do you work out the best gear ratios?

The cars primary function will be road car, with some track time (twisty British tracks

Cheers
Amit

[badmatt]

9" floater.

Or a whole RS IRS chassis if you have the money.

[Amituk]

Thanks for the input guys

any particular brands?

Cant do IRS as I am not paying to ship a chassis across to the UK lol.

why is a 12bolt better than a 9" for power loss?

What are the -ve points for 12bolt over a 9" ?

PS, I am completely new to the world of muscle cars so just trying to learn as much as possible to enable me to make the right choice for my project

[6D9 Matt]

I would go 9" (as I did). I feel (my opinion from what I have seen) that they are stronger than 12-bolts and also are cheaper to fix. Sure they supposedly take more power, but its so miniscule I dont think its worth the argument, but thats just me.

I went with a Moser 9"... matched with a DSE Quadralink.

[Track Junky]

Fist thing you need to do is figure out what rear suspension set up you intend on going with. Do a search on rear suspension set ups and you'll see why.

[Amituk]

All ready have the suspension sorted.

I have a full ridetech level 3 kit.

I am currently favouring the m9 also.

Any other aftermarket worth considering with any particular new or innovative features?

[TheJDMan]

Originally Posted by ratman67

go with a 12 bolt you will have less parasitic hp loss than with a 9"

The difference is so minimal that unless you are driving to hundredths of a second lap times you will never know it!!!

That said a 9" floater is the current hot setup in PT cars. The GMR is the top of the line 9" floater, hands down the best product on the market currently. But it comes at a premium price. There are alternative 9" floaters for more modest budgets from companies like Moser. I installed my Moser 9" floater just a few months before The GMR floater came on the market or I would have a GMR 9" floater under the car now.

[6D9 Matt]

Exactly ^^^ The loss isnt going to be enough to base a major part of your decision on.

[Amituk]

Check out my build thread in my signature to see why the gmr floater is a premium product. The thought and engineering that has gone into their products is incredible.

I am really excited to get it under the car

[pjs65]

Hi iam about 3 miles from Snetterton and go on track days there with my 69 , you,ll get plenty of attention turning up with a muscle car . I have an old school 8.5 10 bolt fitted with an Eaton posi and it does ok for me . Have you driven the Camaro on a circuit yet . Pete