Strongest rear?!

[WheelE30]

Hey guys im done with my LSX swap and now doing suspention and rear and for the rear I want the strongest BMW rear they make or a custom one I was thinking of the z3 m rear diff and axles and obviously with the 5 lug swap I read that there strong but if you guys can help me out the cars going to be a track car but I got a two speed power glide in it with a 4000 stall so it's not going to launch as hard as a stick I want to run slicks so any suggestions please help thanks?!

[MR 325]

Hey guys im done with my LSX swap and now doing suspention and rear and for the rear I want the strongest BMW rear they make or a custom one I was thinking of the z3 m rear diff and axles and obviously with the 5 lug swap I read that there strong but if you guys can help me out the cars going to be a track car but I got a two speed power glide in it with a 4000 stall so it's not going to launch as hard as a stick I want to run slicks so any suggestions please help thanks?!

Z3M stuff is definitely your best bet other than a custom built diff.

By track car I assume you mean drag car?!

[nando]

Z3m is the only easy choice. the biggest weakness will be the E30 halfshafts (Z3m's are beefier), I haven't ever heard of a broken 188mm diff.

or you could do a 'vette IRS swap..

[kalib0y]

^totally agree

[The Volta]

http://www.r3vlimited.com/board/showthread.php?t=119358

This might be some help to you if you want to do custom.

[WheelE30]

Thanks guys how strong is the z3m diff like hp rating I only have 350hp but I plan on making 500+ and 1000hp once I twin turbo it thanks guys

[nando]

like I said, you will break CV's long before you break a 188mm diff. you could always upgrade to a 210mm diff but it will need to be custom mounted.

[TobyB]

...it's torque, not hp, that breaks driveline components...

and if you launch with a manual clutch drop, that's a lot more
shock loading than a TC stalled at 3500 loaded into it...

jus' sayin'...

t

[MR 325]

Oh wow, 1000hp.

More than you can afford pal, Ferrari.

[Wanganstyle]

Hey guys im done with my LSX swap and now doing suspention and rear and for the rear I want the strongest BMW rear they make or a custom one I was thinking of the z3 m rear diff and axles and obviously with the 5 lug swap I read that there strong but if you guys can help me out the cars going to be a track car but I got a two speed power glide in it with a 4000 stall so it's not going to launch as hard as a stick I want to run slicks so any suggestions please help thanks?!

BMW IRS limits are in the Axels. IF the car is going to be kept IRS in the rear, call Driveshaft shop and order high strength axels and stub axels for the 188mm.

210mm diff is overkill unless you are shattering 188mm's.

if you are shattering 188mm frequently and have less than 1,000hp then perhaps work on the launch technique>?
IF you OEM diff is setup properly there will be no issues. If not setup perfect even a ford 9" rear will die.

turbocharged M3's only have issues with rear diff when the owners neglect it. usually the internals get worn to shite, bolt heads shear+drop out and everything explodes. This is called irresponsible owner... similar to money shifting but completely preventable.

100% Original 188mm ring and pinion, built OEM diff and DSS axels+stubs have been proven to low 9's and 1,000 rwhp. drag racing with big slicks and brutal launching on anti lag.

yes, Stock ring and pinion - untreated. Stock LSD built with high lock multi clutch conversion - will take passes with big slicks untill the clutch discs simply wear out. (about 10 miles worth of drag racing passes)


if the car is a drag only car, then do a ford 9" with 4 link live axel rear? time to chop chop chop for better 60 foot times.