I have read nothing but good reviews about the clutchnet 6 puck and red pressure plate. I went to the track for the first time on slicks yesterday, and the clutch slipped at every gear change horribly. It has been ok on the street, (slipped once), but on every gear change, 1-2, 2-3, 3-4, the rpms just hung at redline and I had to let off the gas. It seemed to hold on the launch ok, but I did not launch hard.

Has anyone else with this clutch been to the dragstrip with slicks?


I managed to tiptoe to a 12.7@113mph with a 2.0 60 ft time letting off between every gear change and getting back in it once the rpm's came down. I was really frustrated, and I only made 3 passes. I tried shifting slower and it still didn't help.

What other clutch do the high power guys run?

 

I havent ran this clutch with slicks yet but for the year Ive been running it, it never slipped on me. I have making about the same power as you and its been fine.

Could be an issue with something besides the disc/pressure plate. Did you adjust your clutch pedal?

 

I've got the clutchnet 6 puck disk but I use it with an ACT pressure plate. MikeD had that clutch I believe and he ran slicks a few times without slippage problems.

I wonder about pedal adjustment too. I was having clutch slip problems back the summer after I first got this car when it was making way less power than it does now (when I was seeing 111-114 traps on a weak motor). Adjusted the clutch pedal with no other changes and it's holding far more power now than it was without a hint of slippage, including slicks (though I've only launched it on slicks 3 times, but I wasn't holding anything back when I did).

 

The clutch pedal seems normal to me, same as my last clutch. There is an inch or two of pedal movement before I feel the clutch. I will mess with it for sure before I junk this clutch, it is too expensive to throw away.

 

Mardi ran a clutchnet for a while, not sure if he started having slippage problems or if he changed it out for more holding potential when he did his build. he uses an ACT XT pressure plate and I assume an ACT disk, not sure which disk though.

 

I adjusted on the clutch some, it may be better now. It took 2-3 times, but it seems to be grabbing better on initial release now. I may have to burn some of the glaze off of it now with daily driving. I guess I will find out next time I go to the track.

 

I don't think it is fixed. If I wind out 2nd gear till redline and do a hard fast shift into 3rd, the rpm's just hang and don't fall until I let off the gas. If I shift slower, and let the clutch out fully and let the rpm's fall and then get in the gas its fine. It only slips on hard shifts, it never slips once in gear.

 

hmmm that sucks. which pressure plate did you get? if I recall correctly they have multiple "red" pressure plates, they have something like Red, Red 2x, Red 3x. Might call up clutchnet if you don't know, and ask them what the clamp force is on it.

 

I emailed clutchnet, they said the combo I have is rated 650 hp and 450 lb of torque. I am beginning to think it is the used fidanza flywheel I bought. If the steel inserts on the aluminum flywheel are worn, then I might not be getting the clamping force I need. The PP bolts to the aluminum part of the flywheel, and the clutch rides on the steel portion, if it is worn too far then it might not be clamping right.

 

I knew i was better off with the stocker!! Hope you get that problem fixed Ive had my clutch for 3,000 miles now and its a beast.

 

I emailed clutchnet a picture of the clutch and PP I installed. They said it is the correct clutch (rated for 650hp, 450tq). They said the pressure plate I have is the 50% over stock unit, not the 100% over stock unit. I bought the pressure plate from stephen max unused, but apparently they have several red ones now, and this is not the strongest one.

I am tired of messing with this car, because if I want to take this car to the dragstrip I have to fix the clutch. It works fine for normal driving, but why keep the car if I can't beat on it. I guess I need a new PP and flywheel insert...

 

I will keep posting info even though there are not many responses. This is good info I got from clutchnet and someone else might use it.

About the torque capacity of the pressure plates:
Green - 225 lb/ft
Yellow - 325 lb/ft
Red 2X - 375 lb/ft
Red 3X - 450 lb/ft

You need to order 2X or 3X pressure plate, 3X is better, but too stiff!

 

and your running a boosted 3.5?

 

I am using the ACT Xtremme Pressure Plate with a performance plate rated to 449 ft/lbs. So far it has handled my 398 wtq (uncorrected) without any issues. I have never experienced slippage while running it hard. I originally had the 6-pad race disk, but it was way to harsh in my opinion. I only drove it about 200 miles, and it now sits on the box in my garage.

Maybe a different story slicks....don't know.

 

Good info on the colors/ratings Matt, thanks.

Mex, how's the pedal feel/weight compared to stock with the Xtreme?

 

I actually have the yellow pressure plate but that might have been before they changed the colors up.

abci30 has the ACT Xtreme pressure plate with a Clutchnet 6 puck, it makes my pedal feel weak but it can still be daily driven. It does have terrible chatter though.

 

I would guess that it increased the pedal weight by about 20%. It is easily bearable in heavy Houston traffic.

 

I would get the better pressuer plate and ditch the light weight flywheel

-Mike

 

I am gonna get a better pressure plate, but I love the light flywheel. It is important with the S/C, the faster you can rev up, the faster you get into more boost.

 

the replacement inserts for the Fidanza are around $50 each, IIRC. I bought one several years ago and I think it cost me $110 or so.. when it got here, there were two discs in it because they weren't sure which one I had (production changes.. they used 18 screws in some discs and 16 in others)...

so you might want to tear it down and check before you order. might save you a few bucks.

 

I tried to go to the track again, this combo just sucks. I guess I am gonna order a fidanza insert and a new pressure plate and pull the dang tranny again. Hopefully the clutch is not killed in this short time of slipping.

Now the question is, act extreme pressure plate, or stick with clutchnet and try the red 3x??? With a 6 puck disc, the act is rated for more torque than the clutchnet, but I am afraid the pedal will be that much stiffer and unforgiving.

 

I'm sure the clutch disk itself is fine. I had some bad slippage problems at the track back a long time ago before I adjusted my clutch pedal and it's still fine. I don't know which to advise you to go with though. Find out the clamp load of the clutchnet 3x vs the ACT HD and XT. I believe the HD is 2600lb on our cars but I'm not certain.