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I was told that the EXEDY and HKS were similar units.

I have an HKS twin and it drive like stock, but I heard it has a special engagement technology. Too bad about the EXEDY then... buy the HKS. Though expensive.

 

I hear ACT pushes your crank i'm not too sure how true that is but i'm gettin a iron man stage 5 single disc clutch fo rmy evo 3

 

You heard wrong. It is not possible on a pull type clutch such as the Evo VII - Evo IX.

 

The high RPM lockouts are due to faulty install and adjustment not due to a problem in manufacturing.

I have personally sold and driven a bunch and have not had a single one lock me out.

 

ACT street disc

 

The high rpm lockouts are from HEAVY clutch discs and springs and out of balance clutch units.

Use the search function and you will find the answers you cannot yet accept.

 

I have read through the threads and see a lot of people like the one in this thread saying they adjusted their clutch and it fixed the problem. Some did not but with the forums you never know what is really going on with the car.

Have you installed many of them? have you gotten locked out?

I hope we can talk informatively about the situation and come to a conclusion instead of bickering. If the ACT is having a problem that is in the design I know they would redesign it(or I would stop selling them) they are one of the best companies to deal with in this industry and take pride in what they are doing.

 

I've seen lockout issues on the ACT, but it was only when the clutch was overheated from slipping and that's to be expected.

At 400 lb/ft of torque at the wheels the ACT couldn't hold launches with the max extreme pressure plate. That was on a full face disk. This caused lockouts on the way down the track. That said, customers on a 6 puck disc did have better luck.

If you cruise around the street and don't engage in racing you probably won't have any issues with the ACT and it may be a great choice for you since it's relatively inexpensive. If you drive the car relatively hard the Exedy twin heavy duty ceremetallic would be a much better choice, and if you're going to daily drive the car plus drag race the car like you mean it, you're looking at bigger bucks for something like an Exedy triple to avoid slippage. At 400 lb/ft at the wheels the twin was slipping at high rpm in 3rd/4th gears. That's mustang dyno numbers. The Exedy triple works like a champ at that power level and it even engages more smoothly and with less pedal effort than the ACT clutches or the Exedy twin.

400 lb/ft at the flywheel is a whole other story. The ACT is probably fine if you don't drag launch on it. If you do and you can deal with a 6 puck that may be a good choice. Other than that look at an Exedy twin heavy duty ceremetallic.

To be clear the ACT isn't a bad clutch. For some it works flawlessly and I use ACT clutches in a few of my own cars. It simply handles less power than the Exedy multiplates, but that should be expected as they're more expensive. You get what you pay for.

-Mike

 

I forgot to mention that we install 100 EVO clutches a year. Our last 3 were Fri, Sat and yes, one on Sunday.

From EXEDY single, multiplates, TILTON, ACT, CM and ATS units. ACT represents about 30% of the units installed.

If you are asking personally, I have had 7 ACT units, with the most recent XTSS full faced street disc on my own car with stock flywheel. It grinds 5th gear at anything over 6500rpms.

I am also a tuner and drive all of my customer cars while street tuning so I get to experience how all of the different clutch units feel and drive. Lastly, many of my local customers request me as a driver at the local dragstrip.

So if your question is "do you have experience in the products you are speaking about?", then yes I think we qualify to speak about our experience in ACT clutches.

 

so what us the biggest difference between the tilton and the exedy twin. i am going exedy but the tilton i heard kick *** as well. the act locks out at high rpms from a few of my fiends expecience. yes it holds the power but does not like to slipped at all. and my buddy car grinds over 6k with it adjusted

 

Biggest differences are weight (tilton weighs ~10lbs less) and the Tilton converts the clutch to a push type clutch while the exedy maintains the stock pull setup. Exedy's are also cheaper.

 

so one is no better except the weight. is the push/pull better thank another. i guess the tilton would be better because of design. I dont mind spending the money as long as it performs that way i need it to

 

I hope it is worth it I ordered mine this morning.

 

The designs are different.

Tilton is push type with proprietary hydraulic release bearing (no TOB).

Tilton has ss braided lines all the way to the master cylinder.

Tilton does not use the slave cylinder and it can be removed from the car.

Tilton uses smaller unsprung discs with thicker cerametallic material.

Tilton weighs 19lbs compared to stocklike EXEDY twin weights.

Tilton unit is rated to 740tq, EXEDY is in the 600s.