Mods in sig. 228R cam / bolt ons
I am getting prc 2.5 ls6 heads

My question is how bad will the stock clutch slip on the dyno?
Can I hold off on the clutch?

 

ls7 should hold and they aren't that expensive.

 

Cool. So it would make alot less with the stock clutch because its so weak right?

 

I ran my '04 GTO with TorquerV3 cam and PRC 2.5 LS6 heads on the stock clutch and it didn't appear to be slipping....my clutch only had 60k on it though and wasn't beat hard before. Car made 423whp.

 

I actually have a new stock clutch that I got for cheap. At the time I kept telling myself I was gunna stay bolt on lol

 

I'm surprised the stocker has help up to that kind of power. I guess it depends on mileage, how it's driven, etc...I know when I got mine it had a Spec stage 2 on it's way out, and all it had was Nitto dr's for tires lol

 

i toasted my stock clutch about a month after my cam install. and it only made 383rwhp...

 

My stock clutch couldn't hold on the dyno after H/C and it only had 17k miles on it. Look into a Diamond stage 2 kit with LW flywheel....if you catch them on sale it will be almost the same price as an LS7... And a much, much better setup. Texas drivetrain performance is a sponsor here and they make that clutch. I'd stay away from an LS7, it's just an upgraded LS6 and it uses a heavy flywheel.

You'll be able to drive on your stock clutch but if you floor it the pedal will probably stick to the floor when you go WOT.

 

i ran a diamond stage 2. theyre decent. held 571rwhp. they get hot at the track though. if you like going to the track, get a standard weight flywheel, the LW ones allow the engine to bog too much. while your at it, pick up a tick master cylinder, i have one and its an awesome piece, makes shifting smooth as butter.

 

I ran an Ls7 clutch when I had H/C at 435 rwhp. I didn't go to the strip very often and didn't run a sticky tire. I had tried the ls6, spec 3 and spec 3+ and finally settled on the ls7. It held up fine until I ran it with the new combo and a sticky tire.

 

I had a LuK Pro Gold Clutch with aluminum flywheel in mine. Only ran in for about 2000 miles but loved it. Just pulled it out a few days ago to sell

 

Would it be a bad idea to throw the heads on and get my money's worth out of the stock clutch?

 

Are you running a sticky tire? If not I say go for it...it might last for a bit, and is certainly a cheap alternative for you

 

Not running a sticky. Only down fall would be i bet it will lose power on the dyno. I can't see it not slipping at 400 to the wheels.

 

It really is hard to say. For instance my buddy has a full bolt on 2000 M6 SS with a 125 shot, dyno tuned, BFG dr's, and has been running the stock clutch for a while now with no issues just yet. He makes 460 rwhp & 505 rwtq which is more than you will make with the HCI combo. That's just one example of course. Then there is mine, which when I bought it needed a new clutch as the Spec stage 2 was toast. The guy never sprayed it as a HCI car and all it has is Nitto dr's

 

I just put in a new to the USA Mantic clutch. My car makes 450rwhp and they say it's perfect for these LSx engines. They have been using these clutches in Australia for years and now are here in America. So I thought that I'd give them a try.
I met them at SEMA last year.

 

id get a monster the youd be set for along while.

 

id do a clutch. get the power to the ground first.

 

I should probably do both at once. I think my clutch was slipping on the dyno when I think back. That was cam only.

 

I have one more question. How can you tell if the clutch was slipping by looking at the dyno graph ?