Guest jt240z Posted March 11, 2003 Share Posted March 11, 2003 I was out for a drive today and noticed that under high boost, I'm getting what seems to be clutch slippage. Just wondering what clutch people are using for high boosted turbo engines. I'm using the standard 5 speed Nissan tranny with the Centerforce Dual Friction clutch on a 240Z flywheel. I can't believe I'm getting slippage with the CF Dual Friction. I'm thinking of upgrading to the 2+2 flywheel. Any suggestions? Quote Link to comment Share on other sites More sharing options...
fl327 Posted March 11, 2003 Share Posted March 11, 2003 i need to know as well, the muscle car wars are brewing pretty bad over here, and i can see myself getting called out pretty soon to defend the title-- i am going drag radials and im gonna need a brute savage clutch pretty soon. I like EXEDY and ACT right now, ive heard ACT uses an EXEDY clutch disc... Quote Link to comment Share on other sites More sharing options...
Ivan280zt Posted March 11, 2003 Share Posted March 11, 2003 hey guys i dont have direct experience with clutches (havent even driven my z yet lol) but this is what i know from talking to other guys with turbo z's). for example my friend jtaylor dynoed his z at 388 whp and 420 pounds of torque and so far he went to i belive two six puck clutches (in less than 5000 miles) and with six puck car was not friendly for daily driving. when i went to reynolds i met mike (z-gad) and he was running 3.1 l lots of boost on drag radials and his clutch was slipping bad. from what i remember it was custom heavy duty unit and his motor had only 8000 miles so i belive his clutch did. everyone that i have talked to that had first hand experince with centerforce all they had to say about it was that they were pure junk. now this is what i am going to do on my car whenever my clutch goes out (stock oem turbo one). i am going to get 300zx tt flywheel get it redrilled to fit l-28 (i know of guy that has done this and he does it ofthen) and get me nice act clutch for 300zx tt and that should be more than i will ever need not to mention nice and smooth engagement compering to puck clutchess (which seems to me that most of the guys with high hp z's are running). well that is just my opinion and i hope that it helps yall out some. Ivan Quote Link to comment Share on other sites More sharing options...
J Taylor Posted March 11, 2003 Share Posted March 11, 2003 for example my friend jtaylor dynoed his z at 388 whp and 420 pounds of torque and so far he went to i belive two six puck clutches (in less than 5000 miles) and with six puck car was not friendly for daily driving. ----Actually, the first clutch was in the car when I bought it and supposedly had been for quite soem time. I did make quick work of it though. This second one is the same brand and has been in the car for a few thousand miles without slipping yet. The clutch is a pro-grip from top end performance.....6 puck. It does suck for city driving. JT Quote Link to comment Share on other sites More sharing options...
Ivan280zt Posted March 11, 2003 Share Posted March 11, 2003 close enough . my head might have goten messed up from all the riding in your z red light to red light lol. Ivan Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 11, 2003 Share Posted March 11, 2003 Centerforce is named Centerfarce in some other lands, seems they dont get things right the first time, or at least not in some cases. What about having a stock clutch resurfaced? I think we need to have some powerlevels in mind here. I dont know how great the stock clutch is on this car, but almost doubling the HP levels on my heavy domestic worked fine with a stock replacement clutch, no slip on the dyno or anywhere thereafter that I know of. So what kind of headroom are we looking at here? A super radical clutch, kevlar or carbon fiber plated I should hope are only for those pushing maybe 400 RW or thereabouts. I have the added advantage of not drag racing, although I will probably be out there now and again Quote Link to comment Share on other sites More sharing options...
BayAreaZT Posted March 11, 2003 Share Posted March 11, 2003 I'm putting on my ACT clutch this week. It's rated at 400 ft-lbs with the turbo flywheel. I'll let you know how it holds up. Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 11, 2003 Share Posted March 11, 2003 ACT carbon fiber or ? I only knew them as a carbon fiber driveshaft maker, 400# is the most I'd ever see and I wont be dropping the clutch hardly ever either, sounds great, price? Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted March 11, 2003 Share Posted March 11, 2003 i have used an oem 240mm daiken for years in my 77/81zxt .it only slipped on a 5000 rpm clutch drop at sac raceway and a high load dyno run at 4500 rpm and 13 psi boost.the 300zxtt is a 250mm unit-the 10mm isnt worth the work..the oem z clutch is 225 mm.get a 2+2 flywheel for 240mm clutch.i am switching to a full disc act clutch rated at 400 ft/lb.dont use a puck clutch on the street-it wears a big groove in the flywheel where the pucks run and grabs-like an on/off switch. Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 11, 2003 Share Posted March 11, 2003 Randy, I thought the turbo cars got a 240mm flywheel just like the 2+2 cars? Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted March 11, 2003 Share Posted March 11, 2003 Here is a reply I received from ACT when I asked them about a pressure plate as I already have a disk modified with ceramic "buttons". I opted to go with just the pressure plate as I had the disk I need. Hi Mike, we have a kit #NX2-HDR4 it has pressure plate, 4puck disc, releasebearing, pilot bearing, and alignment tool for $339.50. This kit can hold up to 512ft/lbs of torque and has a 63% increase in clamping load over stock. The disc is a 4puck copper ceramic disc that is unsprung, this allows for quicker shifts and a stronger disc. You may experience clutch chatter around town because of the 4puck disc, but it shouldn't be any different than your last clutch. If you prefer to just change the pressure plate part# N-013 the price for that item is $218.00, but we don't guarantee that it will hold the suggested torque rating. If your going to change the pressure plate you may as well change the disc and the bearings while your at it, the price difference really isn't that much, for the performance upgrade that you can gain from the kit. Thank you and if you have anymore questions just contact me. After doing a little hunting, this place offers the same set-up for ~$20 less tan ACT tremselves. http://www.ptuning.com/html/search-result.cfm?cmbCategory=transm&cmbMakeModel=280zx&cmbBrand= Good luck, Mike Quote Link to comment Share on other sites More sharing options...
Sean 83ZXT Posted March 11, 2003 Share Posted March 11, 2003 You may try SPEC Clutches. I've ridden in TimO's Z and it seemed to hold the power very well and didn't chatter too much. Quote Link to comment Share on other sites More sharing options...
jeffp Posted March 11, 2003 Share Posted March 11, 2003 I burned up my center trash on the dyno @ 375 foot pounds of torque. BYE BYE center trash. I had a clutch built that held 475 foot pounds of torque just fine from superior clutch. The disc is kevlar and a copper compound on the cover side. I have to pull it down here for a new tranny install, so I will be able to tell you how harsh it was on the flywheel. I did not have to many problems on the street, but it would not slip very well off the light, it did take some of the fun out of driving the car on the street tho. But hey, you want to play you are going to have to make compramizes on the options like the clutch unless you like tearing your tranny out every other month. I have to have the disc modified to run the TKO2 spline so I am curious what it is going to look like. I did some real hard pulls on the dyno with it. Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 11, 2003 Share Posted March 11, 2003 Spec has a good name from what I know, I'll dig around to see what they offer. I was also thinking of just resurfacing a stocker with your choice of compounds, this is often the "cheap" race clutch for some people, and resurfacing is usually $100-$120. Quote Link to comment Share on other sites More sharing options...
Guest jt240z Posted March 11, 2003 Share Posted March 11, 2003 What was the cost of the Superior? I know it costs to go fast, but I'm just curious what a custom clutch would go for from Superior. Right now I'm looking at: ACT (street) Superior ? Spec Clutch (Stage 2 or 3) As viable clutch selections. I would like the car to be fairly streetable but I do understand that "Streetable" is a very loose term. Right now I'm thinking of going with a 2+2 flywheel and an ACT "Street" clutch that is rated at 400ft/lbs. You guys are sure right about the Centerforce DF (Dumb F@%&) being a real piece of crap. I think the clutch was going out during the dyno runs for me too. Who has good prices on SPEC clutches? Does anyone have a vendor for Superior Clutch? I'd like to see what they have. Thanks for the help. Time is a bit tight. I need to get the clutch in and installed in less then 3 weeks for a track event on the 29th. If I can get the clutch, I can do the install in 1 or 2 days. This old man gets a bit tired pulling a tranny and putting it back in, in one day. Quote Link to comment Share on other sites More sharing options...
TimO Posted March 11, 2003 Share Posted March 11, 2003 My SPEC clutch is handling over 400 rwhp with no problem. I'm running their four puck carbon sprung hub design. It took over 1,000 miles to break in and now it doesn't chatter. The four puc design is great for fast shifting, the sprung hub is very streetable, and the carbon puck material on the disc really GRABS and HOLDS! Call Dave at SPEC at 205-491-8581. Hey Sean I talked with Nathan Gerolomy this morning and he is getting you the same cam from Elgin that I run! He said the cam is all he was waiting for!! Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted March 12, 2003 Share Posted March 12, 2003 Do a search for some of Lockjaw's posts on this subject. He has a real trick setup using some 300zx pressure plate on the 280ZXT flywheel. A little re-drilling and I think you can use any Z32 (pretty sure) clutch disc and plate. Quote Link to comment Share on other sites More sharing options...
Mudge Posted March 12, 2003 Share Posted March 12, 2003 I think the clutch was going out during the dyno runs for me too. Easy way to find out Call or email the dyno shop, and ask them to email you the dynojet files. Download the free Dynojet runviewer program, and look at the MPH vs RPM, does the RPM go up but the MPH not change? If so, then the clutch is slipping. Quote Link to comment Share on other sites More sharing options...
fl327 Posted March 12, 2003 Share Posted March 12, 2003 hey im looking at ACT right now, and they seem to only have stuff for the 240mm flywheel, i really hope i dont have to swap it out to 240mm, i just had it resurfaced six months ago, my clutch started slipping with the dr's at 5500 or so, hard engagement not an issue for me, i like it. Quote Link to comment Share on other sites More sharing options...
Guest JAMIE T Posted March 12, 2003 Share Posted March 12, 2003 Call SPEC directly. I got my Z28(T56) clutch and aluminum flywheel from them. Nice quality and good customer service. I will call on them again for my 240ZT project. I have a 2+2 flywheel. Quote Link to comment Share on other sites More sharing options...
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