How much can I put down on a stock gsl rear before total destruction? Thanks!

 

Depends on how you drive and the application. Be more specific and you might get a good answer.

 

i would just use it till it breaks, but you can break one with a stock engine

 

Steve is running 300 rwhp on his GSL rear end

 

Street driven but i would like to get into it every now and then. The motor set up will be a 13b PP running a s475 with Fastec mech pump and a lt10. I would like to get it moving until I can do the rear correctly. I will most likely just take it easy.

 

So 6k rpm take offs are bad?

aha

 

Well a good way to ensure safety to the rear end is to run tires that'll allow you to break traction before breaking the tranny, especially if you're putting a very grippy clutch on it. Sumitomo 205s on the stockers are in safe territory, but if you want more grip without hurting the tranny try not to go above 225s with too soft a compound. If you run R comp tires at races, try to get a smooth start before hammering it in the corners. Now if you're taking it to a drag strip with Perif-ported power on some gooey tires with high launch RPM, just expect to rebuild a lot of transmissions and differentials.

 

Yes siree. Don't stuff about with stock diffs if you want to have a good time. By good time I mean skids, launches, brutal step offs, downchanges etc etc.

Or for a cheaper option you could just lock it. Screw the turning radius.

Oh yeah, people running bridgeys here go for hilux diffs so I'm guessing you don't want to put more than 250hp through a stock series 3 diff. As farrel said, alot of it depends on if you're an abusive driver, or a nanny.

 

I have put over 400hp through my rear, and I haven'y broken mine yet. Then again I don't leave spinning and come in sliding.

 

That is totally what she said.

 

You have a couple of options to strengthen the diff and mitigate failures. First would be to purchase a pair of ReSpeed Moser axles. Second would be to cryo treat/harden the diff gears, but even with that at some point it will suffer failure with wide sticky tires and standing start clutch dumps.

If your main goal is drag racing, upgrade the entire rear end now and save the headaches and expenses for something else. The Aussies like the the Hiluix diffs, known as Toyota here. Mnay here in the states opt for the Ford 8.8, but it's quite heavy and takes a bit of modding to fit. Certain years of Mustang 8.8s are more of a direct fit and don't require all the cutting and welding of the housing, along with the custom made axle shafts.

If you would provide more details regarding useage,, wheel/tire size, racing venue, that would help narrow the options. Not familiar with the terms s475, fasttec mech pump and I'm asssuming the LT10 is a standalone ecu?

Torque is what tears up trannys and diffs, which a PP engine sadly lacks, unless you're launching at 8k+.

 

So that wasn't you at our recent dyno day spinning and slidin' ?

 

What choo talkin about Wilus?