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South Bend clutch with ACT Streetlite?

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Saturdee

10+ Year Contributor
405
0
Nov 9, 2010
Duncannon, Pennsylvania
I'm almost done with my rebuild, and I was planning on just reusing my stock flywheel, but just recently decided to go with a lighter one, the ACT Streetlite. I just don't know if my clutch, which is a South Bend TZ/FE, will be compatible with this flywheel or not, or if it even matters at all.

My goal is 350 hp eventually, as a daily driver.
 
It shouldn't matter as long it is the correct flywheel for your vehicle ...

Yes, it does matter when using a feramic friction surface, but the ACT streetlite is the recommended flywheel. The only issue is when using an aluminum flywheel (Fidanza) and using the clutch alot (back to back passes).

I'm almost done with my rebuild, and I was planning on just reusing my stock flywheel, but just recently decided to go with a lighter one, the ACT Streetlite. I just don't know if my clutch, which is a South Bend TZ/FE, will be compatible with this flywheel or not, or if it even matters at all.

My goal is 350 hp eventually, as a daily driver.

I have the same setup, South Bend TZ/FE disk and ACT Streetlite flywheel and it works great. It will be more then enough for your power goals.

Here is a quote from TMZ Performance's website:

The South Bend Clutch TZ/FE-Series Sprung Full-Face Kevlar/Feramic Dual Friction clutch disk is capable of handling more power, heat and abuse than the TZ-series full-Kevlar clutch disk. It can handle substantially more abuse than any organic street disk without excessive wear or glazing issues. The Kevlar material on the pressure plate side allows the clutch to be slipped like a street disk, while the Feramic material on the flywheel side will engage like a puck-clutch when you drop the hammer! It is more aggressive for wear characteristics on flywheel friction surfaces than the TZ-Series full Kevlar disk. If you are intending on street-driving this clutch as its main use, you are fine with any stock or aftermarket flywheel (ACT, Fidanza, etc.). If you are intending on regularly racing the car with multiple passes of back-to-back launches and very high clutch surface temperatures, TMZ Performance recommends that you use an ACT Streetlite Chromoly Steel flywheel or the stock flywheel as it has a better capacity of dissapating heat than an aluminum flywheel with a steel replacement friction surface. IF YOU USE AN ALUMINUM FLYWHEEL WITH THIS CLUTCH DISK -- LET THE CAR COOL DOWN BETWEEN RUNS!!! This is strongly recommended because the aluminum flywheel and the replacement carbon steel friction surface have different expansion rates and heat dissapation rates. You can warp your replacement flywheel friction surface from extended high-heat launches and abuse! As well, the Feramic material will cause more wear on replacement friction surfaces, resulting in the potential of damaging the replacement friction surface installation hardware. With that said, we recommend ACT StreetLite Chromoly Steel flywheels for high-power and heavy-abuse racers that are doing alot of launches back-to-back with little cool-down time! If you are doing primarily street driving, and some races here and there, while allowing proper cool-down of the clutch between runs, the Fidanza Aluminum flywheel is a great choice. These warnings are being disclosed to people that are making high horsepower/torque and are constantly racing! This clutch disk is extremely capable, and is an excellent street/strip clutch disk that can handle alot of abuse and still keep on kicking for alot of miles! Even if you overheat the clutch disk, its Kevlar and Feramic materials won't glaze or burn off like an organic street disk would. If you allow the clutch to cool down, it will return to normal operating conditions and clutch modulation.
 
Last edited by a moderator:
Got it, I even went to that website and started reading, but stopped right before it told you what flywheel to use... LOL, no clue why. Thanks a lot for the response
 
A word of advise, yes the XACT flywheel & TZ/FE is a great setup (what I run) but make sure to measure the ACT flywheel step height before you install it. It's not uncommon for their step height to be incorrect, even when new. From my experience, they seem to be on the shallow side as well, which leads to dragging clutch issues, problems shifting at high rpms & can damage synchro's in the tranny. My last one was stepped .605-.606 from new & it did cause issues. I had mine re-surfaced & stepped to a proper .610
 
A word of advise, yes the XACT flywheel & TZ/FE is a great setup (what I run) but make sure to measure the ACT flywheel step height before you install it. It's not uncommon for their step height to be incorrect, even when new. From my experience, they seem to be on the shallow side as well, which leads to dragging clutch issues, problems shifting at high rpms & can damage synchro's in the tranny. My last one was stepped .605-.606 from new & it did cause issues. I had mine re-surfaced & stepped to a proper .610

Sorry for being late, could you give me some advice for measuring the step height? What exactly is the "step" and what would I need to measure it?
 
i figured i would post here instead of creating a new thread.
im looking to upgrade the clutch flywheel etc, as my stock is burnt LOL.
i just finished building my engine too, and am looking to get around 500whp with a hx35.
eventually id like to step it up, but for now thats the goal.

so my question is should i get the ss or the ss-x tz/fe kit? ill be getting the act streetlite flywheel, but this will also be my daily driver. daily driver being the point of concern LOL. thanks in advanced !
Oh and this is on a 2g fwd!
 
i figured i would post here instead of creating a new thread.
im looking to upgrade the clutch flywheel etc, as my stock is burnt LOL.
i just finished building my engine too, and am looking to get around 500whp with a hx35.
eventually id like to step it up, but for now thats the goal.

so my question is should i get the ss or the ss-x tz/fe kit? ill be getting the act streetlight flywheel, but this will also be my daily driver. daily driver being the point of concern LOL. thanks in advanced !
Oh and this is on a 2g fwd!

I would go with a hx40 if you really want the 500 but Im guessing you already have the 35. Im running the ss tz/fe kit and it seems ok. The pedal pressure feels lighter than my brothers GST running a stage 1 exedy which I think is kinda odd. I'm jumping on tuning within the next 2 weeks or so. I will be running ~19psi(low) and hoping for 30psi(high). We will soon see how it holds up.
 
South Bend Clutch DSM SS Pressure Plate Combo w/ TZ/FE-Series Disk
Item # K536SSTZ/FE $485.00
South Bend Clutch DSM SS-X Clutch Combo w/ TZ/FE Kevlar/Feramic Dual Friction Clutch Disk
Item # K536SSX TZ/FE $545.00
Yeah my brother lent me it from his crx to get the DSM running quicker, as I'm saving for a 6262. For a $60 difference I'm wondering if I should jump onto the higher pressure plate right now, & whether it would compromise the driveabilty (spelling?) compared to the lower pressure plate. It seems as the SS would suffice though. And sounds good! Let us know how that goes :thumb:
 
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