Subject: Recommend a clutch kit for my S52 supercharged Z3

[tariqsm]

Hi there,

It seems like my s52b32 z3m with vfe supercharger's clutch needs replacing shortly. In most cases, I run between 9 and 10 psi. You should change it to 15 psi every so often, though. Additionally, I prefer to maintain a level of clutch engagement and feel that is identical to stock, with the goal of minimizing or eliminating chatter altogether.


I am now considering three possibilities, though.
1. OM (because to my driving habits, it lasted me five or six years).
2. A performance clutch assembly from Sachs and a dual mass flywheel

[tariqsm]

3. Sachs Clutch Kit with ECS Performance Flywheel
This link: https://www.ecstuning.com/b-ecs-part...000282ecs01kt/


I My preference is for option 3, as I've read that the ecs single flywheel produces almost little noise. Is the ecs SMF anything anybody has dealt with before? Would you be willing to express your thoughts and feelings about it if that's the case? Even better, if you know of any further suggestions, please share them with me as well.

In advance, I appreciate it.

[jaydengutierrezkt]

I'm the man you assisted a few times with his 99 M Roadster a few years ago. We met in the huge parking lot near your house. Anyhow, I wanted to say hello and I can't really answer your question about SC. It would be great to get back in contact... Our meeting place was the large parking lot near your house. In any case, I'm not that knowledgeable about SC and I simply wanted to say hi. Reconnecting would be great.

[tariqsm]

Here is the private message that I sent to you.

[ravi.diazsh]

Turbo owners seem to like dual disks. Those that aren't heavy can rumble like a little mass, or even worse. For a couple of years, I was satisfied running a Southbend single disk on an ordinary dual mass. The model I'm thinking of is the Stage 5, and it was very streetable when I was younger. You actually don't need much more than stock with a non intercooled centrifugal supercharger since, unlike turbos, the blower doesn't contribute a lot of torque. It is fortunate that the flywheel is not very light, and it is likely that the ECS kit would work just well. If you aren't already doing so, you might want to run your idle speed at 850 rpm to compensate for the blower's drag on the crank. That is accomplished musically.

When you go to a smaller pulley and increase the pressure to 15 psi, I'm assuming that you're using a high E-mix or WMI. I transitioned from operating centrifugals to turbos a long time ago. Using a Dynojet and a number of modifications on an intercooled Vortech T Trim, I was able to get about 460 rwhp SAE at 16 psi with 93 pump plus meth.

[tariqsm]

In response to your advice, I edited my previous post in the Z3 forum.

An intercooler is not a part of my system. My best effort was made... However, I was unable to remove enough material from the VFE to accommodate one (at least not with my wrenching abilities).


I typically use 91 octane at 10 psi, but ever since gas prices went up, I've started filling up with e85.

At 15 pressure, I inject solely e85 with water to keep the injection air temperature (IAT) below 150 degrees Fahrenheit.

The stock headgasket is still working for me. Until I figure out the gasket problem, I'm trying not to switch too often.

[sofiarh]

The clutch masters 850 twin is what I ride. Changing from zf320 to 420g was as simple as replacing the 750 discs and floater. As far as deals go, it's not awful. One can accommodate all of the donkeys with the help of South Bend Die's specially designed single. According to my acquaintances at Denver Beer and Oil, the single disc South Bend is the way to go. The one with four pucks is the most aggressive. Based on your construction, South Bend will know exactly what you want if you give them a call.

Due to the fact that the Denver beer and oil folks have ran nearly every clutch setup in existence, I can only recommend the south bend. According to them, the South Bend single was the most malleable.


Although I enjoy using my clutch masters since they are easy to use and have race discs instead of street ones, I dislike how heavy the pedal is when deorising. Although the "bmw 850csi e31" slave cylinder is supposed to provide a softer pedal sensation, in practice it resulted in a clutch that seemed broken. After a long stretch of seemingly endless flatness, it finally hits rock bottom. The sensation is unnerving.

[jaydengutierrezkt]

No amount of centrifugal force will ever allow the OP to lift 400 lbs rwtq. He has greater leeway and maybe less expense as he doesn't require a serious clutch. Although I currently use a dual disc in my turbo E36 M3 and my E90 M3 came with one, a single disc is more cost-effective and can handle the force of a centrifugal supercharger without the need for a puck or ceramic disc.

[tariqsm]

Yeah, I certainly won't be attempting to generate more than 400 lb-ft of wheel torque.

Finding the "sweet spot"—maximizing performance without breaking the bank—is my goal as this car is mostly intended as a fun weekend driver.


The advice is helpful, though.