jasonsnova

I know this is a bit random but wondering how far /hard you guys are pishing your t56's
I have a older d&d built 98-02 fbody spec t56 in my nova, I believe it was rated at 700ftlbs , but it still has the 28spline output shaft.
the car has a 365" ls3 head s475 turbo currently at 12psi. I'm guessing its currently around 650+ rwhp range . so far it's been good but haven't had it o. sticky tires either yet. im caging the car this winter and would like to turn it up. wondering what the trans can take before it goes pow!.?
I'm guessing a rpm,tick, d&d etc modified magnum will be in my future
when this one gives up.

HCI2000SS

iTrader: (2)

My stock T56 is holding up just fine with around 600 rwhp, but I don't track the car much

weedburner

With the wrong clutch setup, 500-600 ftlbs.
With the right clutch setup, 800-900 ftlbs.

Either buy the bare minimum amount of clutch that can hold your planned power, or buy more clutch than you need and use something external to soften it's hit.

Grant

necrocannibal

iTrader: (5)

I am at 935 to the wheels right now and it is still keeping me moving. Don't know how long it will last but though.

jasonsnova

not sure about right clutch but I'm running a monster twin disc 1000ftlb rated unit..
guess I will see when it gets turned up...

necrocannibal

iTrader: (5)

I am running the Monster LT1-R in mine. Fantastic clutch.

conan

iTrader: (5)

I'm making 616 at the rear wheel on a bone stock T56 with a RPS full carbon street twin clutch, No problems so far.

stevieturbo

Some break them at sub 500...others are surviving beyond 1k.

There is no simple answer. Driver, usage, environment, power and box condition etc....too many variables.

But most do seem to live well beyond the factory rating of around 450lbft

weedburner

When you have more clutch than transmission, that's the only time variables come into play.

stevieturbo

Variables always come into play...and if you had less clutch than transmission...a slipping clutch is of little use.

weedburner

A broken transmission is also of little use.

Too much clutch not only kills transmissions, but it also kills et. 9.85 @ 144.75 with a 1.55 60', 20th on the fastest 6spd list when ranked by speed, but only 29th on the list when ranked by et. If road course is your focus, carry on. If you are looking for drag strip performance, you are leaving a lot on the table.

Manual guys tend to buy a clutch based on what they may need sometime in the future, not realizing that it will cost them current potential and possibly hurt their transmission.
Automatic guys tend to focus on matching the converter to their current combination, then change converters as they outgrow them.

S2KIWI

weedburner knows what's up.
Same with the honda scene, people running stock boxes at 500-600hp on k24s. Soft clutches reduce driveline shock and prolong the life.
My clutch was matched exactly to my LS3 and setup for now for this reason, multi discipline car really. If I dump a 450ci+ NA donk in it one day, I'll get a new clutch. They're not that expensive if you can afford to upgrade the rest of the stuff. Stock t56mag will do fine until things get crazy, they are 700ft/lbs off the shelf.

stevieturbo

So querying my results, on a 100% road legal, 4 door, 4 seater saloon that gets driven to/from every event, which if a drag strip is hundreds of miles away...a time set nearly 10 years ago, and TBH have only been back to a drag strip once since that time....well it's a bit silly, isnt it ?

But that time was done on basically a stock T56, albeit with Viper mainshaft, and the very same box served me well until this year when 5th gear workings failed on me.

If I was building a drag car only...clearly it would be automatic.

AnotherWs6

iTrader: (17)

This really makes me rethink my monster clutch, stage 3. It's not installed yet, been sitting in my garage for two years now. I want to be able to drive my car like I stole it, it rarely comes out and when it does......

That clutch and the drag radials on opposite ends are probably going to try and find a weak link in between them sooner rather than later.

Any feedback on the clutch tamer with this particular clutch? Sorry for the thread jack.

AnotherWs6

iTrader: (17)

OP - you said cage it and turn it up. I'm assuming that you want to put sticky tires on it at that point?

jasonsnova

yes.....car is set up as pro tour .....which to means do it all. it will go to the drags on 325/50/15 drag radials a few times a year, rest of the time its on the street o. 315/30/18. . this year I was finishing and tuning it and I still managed almost 1000 miles on it. car defiantly has power to go deep into 9's just matter if I can get it to leave......hence the cage this winter.