could someone knowledgable perhaps make up one of those informative posts summarizing the stats and pros and cons of each of the clutches in question similar to the one done on cams awhile back? thanks

 

what's the difference between a full-face and puck design? Advantages/disadvantages of each??

 

usually, but not always, full face disks have a marcel spring between the faces of the disks. This spring looks like a wavy potatoe chip and helps dampen chatter as you engage the clutch. Puck disks do not have this marcel spring. Puck disks are also usually made of a metalic material while full face disks are usualy a semi-organic compound. This is not always the case though, as you can buy full face metallic disks without a marcel spring although they are rare. Also, pucked disks generally (not always) increase torque capacity of a clutch, since the PSI on the disk is higher given the same clamping force. Since the force of the pressure plate is applied over a smaller area, the PSI (pounds per square inch) is higher. FYI, the marcel spring I am referring to is not the set of springs mounted radially around the input shaft spline. Those springs are there to minimize shock loads to the driveline by absorbing torsional shock loads.

 

Good post SuperHatch! Since you have the come knowledge on clutches, do some research on us. Next time when you need a clutch.
Cheers,

 

Quoted from part of a post by Al:

""""
Every time I drive an evo with a ACT its NOT enjoyable. They have a harsh feeling and compared to the much superior Exedy units it takes something away from the car. Allow me to qualify this by stating that I am referring to the ACT unit with the Organic disk.

While the ACT unit is ceratinly a decent value priced unit - essentially it is a OEM clutch with a stronger spring.

Effective - but crude

While some drag racers report that tha ACT unit is capable
for staight line applications, I find it to be a crude and ill shifting unit and more akin to something you would find on a pick up truck or camaro than a JDM sports car.
""""

This is exactly how I felt after installing an ACT organic with a Fizdanza flywheel in my celica GTS.


Are any of you guys running the Exedy single? I'm going to be in the market for a new clutch within the next 1-2 months. (Currently 25k on the stock and its still feels decent)

I don't plan on doing any sort of racing other than some aggressive driving here and there. I may launch the car every once in a while but it would be a 4-5k slip. I'm looking for something that will last and can handle 300-350hp.

Buschur has recommended the Exedy Twin (I'm not sure exactly which one just yet). I will be having them install it rather than a local shop so I know it's going to get done right.

There are some reallly bright people on these forums.. any help to aide with my decision would be great.

One thing I thought was kind of funny while reading this thread is the comparison of price between the ACT and Exedy. Sure you can buy 25 ACT's disc's for the price of the Exedy.. but you're not taking in account the cost and time of labor.

I better run.. had mexican food for lunch

 

I have the Exedy Twin and so far so good. Very smooth and not loud at all. It holds very well and its pretty light for my foot. It was a bit notchy when it got installed but now after 1K miles its very smooth.

 

The Exedy hyper single uses a 2200lb pressure plate which is the same rating as stock. The only differences is the Exedy uses a cerametallic 6 puck and you get a light weight flywheel.

So if you want the same strength for less money, go buy a 6 puck disc.

 

I'm still leaning towards the Exedy Twin. I really don't want/need a 6 puck disc for the type of driving i do.

I need something that's not going to **** me off when I'm in traffic on hills and such

Thx for the input

 

These are the springs I think he is refering too.

First is exedy second is hks. ORC also uses a design like HKS.

 

First of all let me just say JustChil is the man...he hooked me up! But anyway...In regards to the ACT clutch...I am making 310/315 (no cams) and using the ACT/Fid combo....The car is very streetable, i use it every day ( about 60-80 miles a day) and I DRIVE my car. The pedal play requires some more strength but is not a problem ever, I think it makes it easier to control b/c of feedback but thats just me. AL made the comment that he wasnt a big fan of the ACT clutchs after tuning my car but he liked the way my car drove...so i dont know (he does SELL the exedy units)Either way for the price and for what I am runnning the ACT is perfect for my car. Ill buy a twin disk when I do my next round of mods that put me in the 450 club!!!

 

get act and forget about it. It'll last you a while until you have to get it again, so get something that works like/feels like stock and then get another one.

 

Updates please...

 

his car was totaled so it was never resolved.

 

Anyone had any experience with Works clutches? Thinking about the CK2...

 

Before I sold my car my Cusco Twin disk was kicking serious ***. I do think the new owner is having any problems with if either and the engagement is stock.