94awdcoupe
15+ Year Contributor
- 1,414
- 205
- Nov 6, 2004
-
tampa,
Florida
I didnt copy and paste anything, dude. I have a crapload of first hand clutch experience.
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How about first hand experience with the clutch that's in discussion ( tz southbend full face ceramic?) Have you had any? Just curious.I didnt copy and paste anything, dude. I have a crapload of first hand clutch experience.
I didnt copy and paste anything, dude. I have a crapload of first hand clutch experience.
Alright, so after installing my new ss-x clutch I FINALLY was able to mount up the transmission (by myself). Anyway, I noticed the clutch fork is hitting the housing at the same point the bearing contacts the pressure plate:You must be logged in to view this image or video.You must be logged in to view this image or video.
Sorry for the crappy pics...
I'm assuming the flywheel needs to be stepped properly. It's a lightened XTD that I bought 80 years ago, but it had no problems with my ACT 2600. I'd really like to avoid machining a flywheel, so my question is...what flywheel will just drop in and work without machining?
Well give Tim the credit i was on the verge of dropping some mad cash on a twin disc and after speaking with him he said he would be happy to sell me a twin disc but felt that ss-x, full-face ceramic would do the job. Turns out its doing the job very well. I can't stress enough how soft the peddle is and how smooth the engagement is and the best part is that I still haven't reach the torque capacity of the clutch yet. thanks Tim for a great product!
You seem to be the only one in here that has given good (informative) feedback. no one else has given any actual torque numbers.
Alright, so after installing my new ss-x clutch I FINALLY was able to mount up the transmission (by myself). Anyway, I noticed the clutch fork is hitting the housing at the same point the bearing contacts the pressure plate:You must be logged in to view this image or video.You must be logged in to view this image or video.
Sorry for the crappy pics...
I'm assuming the flywheel needs to be stepped properly. It's a lightened XTD that I bought 80 years ago, but it had no problems with my ACT 2600. I'd really like to avoid machining a flywheel, so my question is...what flywheel will just drop in and work without machining?
You must not read very well, I've seen plenty of people post torque numbers. Myself included.
I been foolYou seem to be the only one in here that has given good (informative) feedback. no one else has given any actual torque numbers. you say the SSX pressure plate has a soft peddle. What is that in relation to? what other pressure plates have you felt? what does it compare to?
I will give the run down of 11 years when when I get to a computer to much to type using my phone.You seem to be the only one in here that has given good (informative) feedback. no one else has given any actual torque numbers. you say the SSX pressure plate has a soft peddle. What is that in relation to? what other pressure plates have you felt? what does it compare to?
this is in my evo1. 2750 lb car. it was used with the factory flywheel. no media blasting. it wouldnt hold 4th gear rolling into it. the car dynoed 460/421tq. but it was hot 97 in the dyno. surely it made more tq on the street with 80 degree intake temps. didnt try launching it but once. it held launch very well. the friction surface was 95% bedded when it was removed. step height was not the issue. I like to use the least amount of clutch that is needed. the act 2600 has since held 500tq in the car but I would like to get to a softer pedal if possible. I was kinda miffed it didnt hold the power it advertised to. would like to try SSX pressure plate with either tz or tz/b disc. but I want confirmation this 2700lb plate is softer than the newer design 2600 (one with pressed bump in fingers)
On a side note I just recently adding a hydro throw out bearing to my current act2600 clutch. I have been researching this for about 4 years and finally got it done. hydro bearing eliminates 3 friction points, eliminates pivot arm flex, modulates a good bit faster and shaves about a 1b. I will report later if it improves high rpm shifts
The SBC SS-X pressure plate is considerably softer than an ACT 2600PP. The reason why the pedal pressure is softer is due to the disengagement window of the pressure plate is shorter due to the location of the fulcrum (release ring) for the lever (diaphragm spring). The ACT will have a larger disengagement window but will take more effort to disengage while the SBC will require a properly functioning hydraulic system and pedal assembly to handle the shorter disengagement window while having taking less effort to actuate. Search for 1st Order / 1st Class lever for more information; the difference in effort is based upon the placement of the fulcrum.
It was slipping on the dyno under load, or slipping on the street under load?
Well, that is about the least amount of clutch for the job. If you want, do a full Ceramic disk instead of the Kevlar if you don't want it to slip while having soft pedal pressure.
without going into a lot of detail here's what I have used over the years most of the Act and Competition clutch units was used with all type of disc from sprung to unsprung.You seem to be the only one in here that has given good (informative) feedback. no one else has given any actual torque numbers. you say the SSX pressure plate has a soft peddle. What is that in relation to? what other pressure plates have you felt? what does it compare to?
OEM slave/master. I don't tell anyone to run anything different. You should have 3/4"-1" of overall slave travel at the slave rod to fork in an OEM pedal/hydraulic situation.well thanks for the explanation on the pressure plate. this hydro bearing I installed shortened the window substantially. the face of bearing is larger than dsm so it pushes the fingers open quicker with less travel. I was already considering drilling another hole on the pedal to get better leverage and some travel back. sounds like i will need to find a smaller than 5/8 master to use the ssx pressure plate. does the ss also have the shorter window?
does everyone just use the smaller slave with SSX pressure plate? or is more tweaking needed?
there are two sizes of OEM slave cylinders. 3/4 and 13/16. and there is a pretty big difference between the two as far as how the clutch works. with an act 2600 everything has to be adjusted perfectly to use the 13/16. the reward is a lighter pedal feel and excellent modulation. with the 3/4 cylinder the pedal pressure increases about 20%. but the clutch disengages quicker and the trans will shift cleaner. but its considerable harder to drive because you loose modulation. I like the 13/16 becasue you can use the evo 8 internals which have a double seal. the dsm cylinders have a single seal.OEM slave/master. I don't tell anyone to run anything different. You should have 3/4"-1" of overall slave travel at the slave rod to fork in an OEM pedal/hydraulic situation.
I would pull the trans and measure what we are working with dimensionally for the flywheel as well as the measured step height and flywheel friction surface offset height from the crank flange so we know where the clutch is actually sitting at when installed.
Hopefully you didn't damage your bellhousing as well. NEVER EVER use the bolts to draw in the transmission. It should EASILY slide on with the clutch disk aligned and the alignment dowels in place with a simple jackstand or chains on a hoist from above and zero load on the clutch disk hub from the input shaft. Also confirm you didn't break your front or rear motor block tabs.
Glad you worked it out and thanks for the feedbackThe bellhousing seems fine and so does the disk, turns out it did not break. Now I'm not sure what the popping sound was...maybe the alignment dowel popping into place
Anyway, I laid the XTD and ACT flywheels next to eachother and the XTD step was noticeably lower. After mounting up the new ACT flywheel, and making damn sure the transmission was aligned, the fork is perfectly centered with more than enough to pivot properly now. Feeling pretty good about it...can't wait to get her on the track and dyno
So for anyone searching, ACT flywheels are very compatible with a southbend setup!