400RWHP - ACT S/S or Exedy Stage 1 Clutch Hold Up?
 

I think it's safe to say that the ACT S/S will be able to hold that kind of horse power, but any confirmation would be great.

There is very little info on Exedy stage 1 clutches. Does anyone know if the stage 1 with organic disc will be able to hold that kind of power?

yes, ACT will be great. I run a HDMM.

Can anyone comment about the Exedy stage 1 clutches?

i highly doubt it, what are your torque numbers

Around 300 ft/lbs.

Could I just swap out the disc and use an ACT 6 puck sprung disc with the Exedy Pressure plate?

i personally would not trust the street/strip clutch with running 300+ torque.

go with a twin disk exedy clutch. you will pay around 1k-3k for it but you will be very satisfied with the feel and durability

I can't afford that, I guess my only option is to run a 6 puck with my Exedy pressure plate?

Don't put the 6 puck disk in there. The problem is mainly insufficient clamping force of the pressure plate, not the disk. This is why many act and other heavy duty clutches use a stock disk with a heavier pressure plate. If the clutch is already in the leave it until it slips. Otherwise I would sell it to someone with less hp goals and get an act heavy duty.

Bah! I've been trying to sell it for a while now...a disc is $100, a whole new kit is $500, I cant afford to spend that much right now.

I know that a good portion of a clutches holding power comes from the pressure plate, but doesnt the disc type and material matter almost as much too?

Wouldnt it be correct to say that an Exedy stage 1 pressure plate with a ACT 6 puck disc would hold *about* 20% more then the same Exedy stage 1 pressure plate with an organic street disc?

ACT has two strengths of pressure plates: HD and XT (stronger) (omitting the SP;weaker than HD, and the XX, stronger than XT)
They have multiple disks, but I am only going to compare two: the SS(street strip) and the G6(6 puck sprung)

HD/SS is rated to: 402 ft/lbs of torque
HD/G6 is rated to: 514 ft/lbs of torque
XT/SS is rated to: 451 ft/lbs of torque
XT/G6 is rated to: 577 ft/lbs of torque

These are taken from their website: http://www.advancedclutch.com/produc...d_id=2887#2887

Notice how you can have the sprung 6 puck with the weaker HD pressure plate and hold more than the stronger XT pressure plate with the SS (Street/Strip) disk.

This shows that the disk material is definitely important to total torque capability.

Also, the torque is what is going to be primarily important, and it is crank torque, not wheel torque, as the clutch has to hole directly off the engine.

You can have any combination of the available pressure plates and clutch disks. Here is the link to a table that lists all of their available pp's and cd's.:
http://www.advancedclutch.com/media/...engagement.pdf

For any car driven on the street I would avoid all of the 4 pucks and also avoid the non-sprung 6 puck. Also, for a street driven vehicle with a stock clutch fork, I would absolutely stay away from the XX pressure plate. The strongest pressure plate I would go with is the XT, but if you don't mind a bit of chatter or rougher engagement but still need lots of clamping power, the HDG6 is a good combination for a weekend warrior/autocross vehicle in my opinion. Personally, my goal would be to have the minimum amount of pressure plate due to the design of the FD clutch fork.

Ah, didnt know it was rated at the crank/eshaft. Good info, thanks.