How strong is the stock rear end?

[TargaMK3Turbo]

I have an 87 turbo 5spd. I guess it has a 3.91 LSD. I have a set of hard sidewall slicks, 26x10.5x15 IIRC.. Something around there.

If I launch my car, will it grenade the rear end? They were on my mustang before.

Also, my car has basic mods like a 3" exhaust, downpipe, intake, and mbc.

Thanks

 

[upgradedsupra]

I have done many 1.6 60ft's in my Supra and best of 1.5. > Nothing broken

Duane

 

[MKivSupra_Rob]

I have done many 1.6 60ft's in my Supra and best of 1.5. > Nothing broken

Duane

you have the stock rear in still!?!?!

 

[upgradedsupra]

you have the stock rear in still!?!?!

Yes I do :naughty:

 

[MKivSupra_Rob]

alright point proven lol whoever told you it;d grenade the rear end didnt know what they were talking about.

 

[3day240sx]

How much hp on slicks will they hold?

Could you realisticly put a ford or chevy big block in a poopra and launch on slicks?

 

[TargaMK3Turbo]

alright point proven lol whoever told you it;d grenade the rear end didnt know what they were talking about.

The original owner and a guy who drives a built and boosted civic si.

Well, this is good news then. Thanks

 

[johnathan1]

Stock LSD is really strong, just like the R154. Just make sure your differential subframe mounting bolts are tight, or you will have a cracked subframe in no time. Ask me how I know..

 

[starscream5000]

The original owner and a guy who drives a built and boosted civic si.

Well, this is good news then. Thanks

Coming from a person who drives a car that, when racing, changing trannies is considered regular maintenance .

 

[prsrcokr]

Keep in mind with a clutch type LSD, the clutches are there to slip taking some load. With a gear type, there's nothing able to slip.
Toyota rears are pretty strong, I've read about offroad guys using them for years.

 

[gixxer750]

I'll put it to you this way. I've broken 5 R154's, but not one LSD at the track. 500 + hp 5000 RPM launches

 

[3day240sx]

Damn. I think I have my answer then.

 

[Slow66]

bunch of 1.5x 60's here too.... Not that the rear shouldn't be checked and gone thru if need be, of course....

 

[gixxer750]

It also seems to take the abuse of.... wheel hop very well. ha

 

[TargaMK3Turbo]

It also seems to take the abuse of.... wheel hop very well. ha

Hmm, I've never had a bit of wheel hop yet :icon_conf

 

[OfnaRcR4]

Hmm, I've never had a bit of wheel hop yet :icon_conf

I have it really bad.

 

[gixxer750]

You don't have enough power if you've never had wheel hop

 

[Tun_x]

Your not going to hurt your rear end with that amount of tire and power!! As long as it was in good condition to begin with..


Jason

 

[TurboStreetCar]

if duane uses it, its strong enough.

 

[Doward]

if duane uses it, its strong enough.

No offense to Duane, but that's a piss poor reason to think it's strong enough.

Duane could have a fluke of factory engineering, that just happens to handle the beatings better than another.

Personally, I would recommend going through and freshening up the bearings/seals, and well as checking backlash and gear mesh patterns, if you are seriously going to be running with some hard launches.

You will never know the state of operation your differential is in, unless you open it and check it.