What goes first Rear diff ?!

[LsxE30]

Hey guys want to build my rear diff was thinking to get a good center section and dss axles but how strong are the ring and pinion gears because I can't find a company that makes really strong gears please shed some light on this the car will be used for drag and I have 400hp now but planning to be around 650+ so I need something strong thanks

[iwantspeed]

http://diffsonline.com/product/customdiff1.shtml

[roguetoaster]

I could be wrong, but 600hp will probably break lots of stock parts and would seem to necessitate a change in the entire driveline. If you are just going to build it for drag just custom box the rear end and install whatever you want.

[jlevie]

Rip out all of the rear suspension, diff, and drive shaft and imaginer a solid rear axle and one piece drive shaft. Then the failure will move to the transmission. An yes it has been done (lots of work and lots of money).

[FLG]

Get in touch with Wanganstyle

[iwantspeed]

from e30 tech

http://www.e30tech.com/forum/showthread.php?t=58761

[LsxE30]

Yeah iv seen the c4 IRS and was thinking once I start breaking a built bmw IRS alot to custom fab a 9" or 12bolt solid but haven't seem many right ups on solid rear stuff thanks though good suggestions

[IronFreak]

Don't even waste your time with the bmw stuff, the hp isn;t the biggest issue, it the fact that the suspension under an E30 was not designed for drag racing. I'm not saying that from a BMW enthusiast standpoint either. I'm building my first track car, but come from drag racing, save your money, learn to weld and build a solid axle conversion. Building a 9" is a drop in the bucket cost wise against making a bmw IRS hold that power.

[TobyB]

Building a 9" is a drop in the bucket

and billions of ratios and darn near bulletproof.

t