85streetmachine

Looking for input on which clutch to use on my T56/Lt1 combo. Gonna have about 425-450hp, and I don't know if Ram's will hold up (says it's good for upto 400hp).

cam-

***EDIT*** sorry bro didnt notice you were talkin LT1


So in that case I suggest an LT4 pressure plate and a decent disk. I ran many combos and to be honest I never really found an ideal clutch set up for the LT1 style t56. I've read the Mcleod street twin is best for holding big power but a little harsh on the street. Even that set up seems to use the LT4 p plate. Good luck!

A10Beav

iTrader: (1)

I have the SPEC 3+, it holds good and isn't too bad for daily driving. The pedal is a little heavy, so it would suck if you have to deal with a lot of stop-and-go traffic.

I don't consider it an on/off switch either, I'm able to get smooth engagements after a little practice.

85streetmachine

Where can i find the "SPEC 3" clutch and for how much??

zacharyhorn

iTrader: (1)

I would personally stay away from spec. I'm not to familiar w/ the Spec 3+, but I know the Spec 3's the spring likes to come out of the hub.

A10Beav

iTrader: (1)

You'll hear pro's and con's about every clutch. I searched several sites and SPEC was one of the more popular and recommended clutches. The 3+ is an upgraded version of the 3; it'll hold a lot more power but it's better on the street than the 3.

I've purchased many parts from Thunder Racing, here's a link:
http://www.thunderracing.com/catalog...&vid=4&pcid=72

TexasLT1

I've had a SPEC Stage 3 in my car for over 5000 miles and have never had any problems with it. some people do, some people don't. The Centerforce Dual Friction that I had before it lasted almost 4 years. I'd highly recommend one.

also, what mods are you planning to get to 425hp?

go to specclutch.com for prices

85streetmachine

Mods i'm doing are: fully ported heads/intake, 58mm TB, Comp 306, 1.6 full roller rockers, hedman d port shorties (need the clearance), descreened and ported MAF, and a good tune (open to suggestions for this). Hoping to get 425-450 engine HP, not sure what it would be at the rear wheels. It's going to be a daily driver, with just a little power in case those rice burners show up LOL.

85streetmachine

I just checked out SPEC's website and their stage 1 clutch says good till 480 torque, and stage3+ is like 800. Is that a little excessive and wouldn't stage 1 be good enough?

TexasLT1

stage 3 would be excessive, stage 1 might not be enough, shoot for the middle and go with the stage 2

Klortho

You may want to look again at the 306, I was going to put one in but a buddy who had one in his '95 said the RPM range was too high for him. He said it came in around 3500 and was pulling until 6800. He ended up going with the XFI292 Comp cam with ported/polished heads, etc etc and made 380hp/350torque 486/550 torque on the bottle and ran 7.30 in the 1/8th on the bottle, not too shabby. I'm looking at either the 292 or something a shade smaller to keep my RPM range down into the managable field.

J's T/A

iTrader: (2)

To chime in with another option, I was running a spec stage 2 with no problems and now a spec stage 2+.. 400rwhp holds ok, comparing the two the 2+ appears to have much better springs on the disc and is plenty driveable..

If you are a track monster would drag radials I would then look to stage 3 and up..

another 02.

1991 RS/SS

I completed my auto-to-T56 swap about 5000 miles ago and did a Spec 3 when I did the swap. I cant say enough good about it.

It holds great and is very drivable.

It was a virtual on/off switch for about the first 300 miles until it broke in. Now it is still aggressive, yet very streetable.