i know the N/A rear-end in a 7-inch and the turbo II rear is a 8-inch but is that the only diffrence? i'm basiclly going to be using a stock N/A rear-end for a LS1 swap i'm doing and i'm wanting to know if it's up to snuff. i've read plenty of post and threads about people blowing them up, but they seem to only be blowing the open-diffs in them not the ring&pinion. also, anyone have any idea how much power a N/A rear with the torsen HLSD can hold? i don't drag or use slicks, just street/light track.

 

Most people don't recommend pushing the N/A rear end, even LSD model, over 300hp without having it hardened. It's not that expensive to swap to the turbo drive train so I would definitely recommend going that direction.

 

if you dont drag race with slicks you can make it last.

 

so by hardening do you mean cyro dipping or shot peening the ring and pinion?

 

Just dont get wheel hop!
Here's some pics of my street ported NA that got wheel hop when launching hard on street tires.
Thats on an OPEN differential too!

 

wow thats nasty

 

Yes. If you look at Shainiac's post, he blew out a NA rear end with nothing but a streetported N/A. That was producing somewhere between 200-250. And your planning on putting a motor that has 325 stock. Just some food for thought.

It really would be worth it to upgrade to the turbo drivetrain. You can get the full set, driveshaft back for like 300$ tops so I don't see why that isn't a option...

 

since when do street ported na's reach 250 whp?

be realistic. 170 to 210 whp. and 210 is with mods to the teeth and custome porting and fuel maps and whatnot.

rule of thumb. if you break traction, then thats all youll break.

 

It was a estimate.

I fail to see your logic when their was pictures less than 4 posts before you showing how another member blew out his N/A OPEN diff launching on street tires with a N/A SP.

OP wants to put a motor with 2x the power and torque on his N/A drivetrain. Have fun throwing your driveshaft though the cabin or blowing the diff whenever you decide you want to do some spirited driving. I'm done with this thread.

 

I never said the NA rear wouldnt hold it, I just said to take care of it. Wheel hop is bad for any car, especially if its making twice the hp and probably 3x the torque like you will be.

On a side note, Zbrown on this forum was pusing a bridge motor (I think) and a BIG turbo very hard on the stock NA LSD. He was dragging the car on drag radials Iirc and never had problems with the rear end. There are videos of him out there launching with anti-lag like a bat outa hell on the NA rear and axels.
It can be done.

 

im sorry you fail to see logic.

there are MANY members on this forum putting down 300+ whp on cars with non turbo rear ends.

 

It's mostly in how you use it. Some people are abusive on the car, others are more sympathetic and their stuff lasts longer. Take ITS racing for instance, some people blow up several NA transmissions a year, others have no issues whatsoever. What's different there? The driver.

 

It was a wildly crazy estimate that would never come close to being actual reality. Thus it helps this thread in no way.

Meh, 2x the power of the NA 13B is still weak.

If you're not running slicks, the NA rear end will hold 400+ HP. And so will the transmission, driveshaft, half shafts and all other NA drivetrain components minus the clutch. Ask me how I know.

 

TII diff is cheap... get it.

/endthread