Hello, I'm planning my third gen camaro project but I need help choosing a diff ratio.
I have an ls3 with 575bhp and 525lb-ft torque at the flywheel. i want to put a t56 behind it that has 2.66 1.78 1.30 1.00 .80 .63 gears. I'm gonna keep tires close to stock height but 11.5 wide at the rear. I plan to keep it a daily(maybe) that can run 11s in the 1/4 but also have a decent top speed for sprints.

 

I don't know about gear ratio, but I hope you don't plan to use a stock 10 bolt for that...

 

No I was planning on using a Moser 12 bolt

 

With the .63 6th OD, I would go with 4.10/4.11 (12 bolt is 4.11 I think) gears

 

Do you think stock height wheels could hook up at launch with a 4.11 at 525lb-ft. I want my rears to be about 11.5 wide but keep stock like height with maybe 18in rims just for appearance. Also want to use the same tires on street as I do on track(if possible). Was worried the torque would cause too much wheel spin with 4.11 with the wheels being that short, but I could be wrong. I don't know much about tires

 

Scratch that about stock tire height, what I mean is fitting the wheel well without modification

 

I don't race but have been here long enough to know you will "NOT" hook with a streat tire. They do make a street/track tire but with what you have even that will be pushing it.
You might consider two sets of tires.
One for every day driving and something like this for the track.
= http://www.mickeythompsontires.com/s...ETStreetRadial
Thay only make them up to 17in wheels though.


I would put the street tire on the nice 18s and a 15in. wheel for the track. Much better selection in a tire that size suitable for your track use.


Don't buy a expensive wheel and then find out the tire selection is not what your looking for.


I would advise doing a through tire search concerning any size / diameter wheel your considering. That way you will know before hand what tires will be available for the size you choose.

 

Yeah I meant using a track/street tire but yeah I figured it would be pushing it. Think if I went with a bigger wheel it would work? Tire wise I'm not sure what's street legal or not and how that's determined. But I've seen builds simaler to mine and I think I could handle a tire that size if I have too but are there street legal versions? If it's not possible to make one set work I'll live. Suggestions on what tires for both sets would be nice as well. Tires is one thing I don't know.

 

I see what you're saying. Appreciate it.

 

The tire seach is the hardest part to me. The diff a close second...probably will just go with the 4.11 and get two wheel sets. I didn't expect to have the engine I do originally so that changed everything