[farbmw]

Hi,

Just wanted to put out there if anyone know which clutch would be better for our 335i if you are putting out over 500hp to the wheels.

Any thoughts?

Thanks

[dzenno]

http://www.e90post.com/forums/showthread.php?t=452997

Generally ceramics have harsh engagement but hold more power, organic full face clutches have easier engagement but tend to hold a bit less power while at the same time outlast any other material 2-5x on average (just what I gathered researching the topic over the past few days)...if I was choosing a clutch NOW given everything I know on this car in that respect it'd be an organic/kevlar full face one, unsprung, keeping the dual mass flywheel...once you go north of about 550tq I'd try to find alternatives including solid flywheel which will have more chatter, harsher engagement and that much power is really not meant for a smooth daily driver...

[R1000K3]

Ceramic clutch is for track use only according to ACT http://www2.advancedclutch.com/PR/B0..._535I%20PR.pdf

You also need to look at the torque spec's. and see which clutch that meets your need.

[dzenno]

Originally Posted by R1000K3

Ceramic clutch is for track use only according to ACT http://www2.advancedclutch.com/PR/B0..._535I%20PR.pdf

You also need to look at the torque spec's. and see which clutch that meets your need.

Its funny how a lot of manufacturers will claim their ceramic puck clutches are both streetable and ready for track...yes, while that may be entirely true, they're not saying how long they'll last on the road in a daily driver setup that sees a ton of stop/go traffic..i'm not talking how heavy they are on your left foot/leg or engagement harshness or anything other than pure longevity of a ceramic clutch disk on the street...i had a bad experience and really wish this isn't the case typically out there...

[Former_Boosted_IS]

Originally Posted by R1000K3

Ceramic clutch is for track use only according to ACT http://www2.advancedclutch.com/PR/B0..._535I%20PR.pdf

You also need to look at the torque spec's. and see which clutch that meets your need.

I have ripped through organic clutches with high torque faster than I can tell you. It all depends on how much power you want to put to the ground. The stock DMF is also a serious hurdle. It not a solid disc unfortunately. There are two discs mated together with about 30 degree play. I suspect that DMF will not do well against the higher hp cars.

North of 600 rwtq and you obliterate a organic clutch all day every day.

[dzenno]

far, FBIS has a good point obviously as ceramics WILL hold more power than organics no question about that, BUT, given your car is a DD (as far as I know) you have to know that pushing THIS car over 500wtq and having THIS car a DD will most likely cause premature wear on your ceramic clutch and solid flywheel and you really don't want that happening on a ~$1500 clutch kit...Its crazy, but you have to understand when you are working with race products, and abusing the car, ceramic is not meant to slip like a stock/organic clutch, and you have less surface area...it all depends on use...

speaking from experience and NOT speculating, my advice is irrespective of the clutch, if you want to be able to enjoy this car fully DON'T go north of 500 and get a good organic clutch...it'll get expensive and annoying to drive daily...on the other hand if its NOT your daily driver then forget EVERYTHING I said having said that I'm looking into getting another daily driver pretty soon...

[farbmw]

Damn I was hoping to go north of 500whp and have a clutch that I can use as a DD.

But I do know other people that have over 500whp and don't go though clutch like that, but they are for different cars not the 335i.

[dzenno]

Probably not many of them make as much torque especially not as low as 2500rpm...when picking it you have to keep in mind streetability AS WELL as longevity if its a daily driver..its a hard decision and honestly I'm still debating what to do too..

[Former_Boosted_IS]

Originally Posted by farbmw

Damn I was hoping to go north of 500whp and have a clutch that I can use as a DD.

But I do know other people that have over 500whp and don't go though clutch like that, but they are for different cars not the 335i.

I am running a ceramic all the time. Dzenno seems to be a very odd situation though because many put 30k+ miles on ceramics.

[dzenno]

Originally Posted by Former_Boosted_IS

I am running a ceramic all the time. Dzenno seems to be a very odd situation though because many put 30k+ miles on ceramics.

Daily driven 30k+ miles? Hopefully you're saying 30k is minimum with heavy track use/abuse...

Isn't yours a twin disk with organic on one?

I'm really hoping my situation turns out to be "odd" as otherwise there's no hope for this car and its clutches even with stock turbos when it comes to daily driving it it'd have to become a track-only VERY low-milage car..

[Mr. 5]

I have an ACT clutch available.
I wish i would have known you were in the market, I would have thrown it in the box with a discount.

[farbmw]

Originally Posted by Mr. 5

I have an ACT clutch available.
I wish i would have known you were in the market, I would have thrown it in the box with a discount.

lol ture that but you can still give me a discount

My clutch is still good but if I get the car up to 500whp, I think I may have a problem, and I do want to get it pass the 500whp barrier

[R1000K3]

You should be able to slightly pass the 500 whp barrier with the organic ACT clutch since it is specified for 450+ wtq, which corresponds to about 500 whp on the N54. As long as you are not making a lot of hard launches with drag radials on a grip-prepared strip. Just my 2c.

[dzenno]

Don't think that ACT rates their clutches with wheel torque...think its crank...

R1000K3, you're planning using the ACT organic with NoZ?

[farbmw]

Originally Posted by R1000K3

You should be able to slightly pass the 500 whp barrier with the organic ACT clutch since it is specified for 450+ wtq, which corresponds to about 500 whp on the N54. As long as you are not making a lot of hard launches with drag radials on a grip-prepared strip. Just my 2c.

I do plan on doing some drag times and some track course times, just because someone challenged me, I would mention any names.

I'm just like that!

[R1000K3]

You are right dzenno, it must be engine torque and nothing else... The actual torque on the wheels is of course a lot more but this is not seen by the clutch since this is generated by the gearbox and final drive.

I'll test if the organic ACT clutch can take some N20, but guess it will not be an easy task for it. N20 will only be used, if possible with this clutch, for special occasions. I'm quite happy if the clutch will handle the power good enough from about 20 meth assisted PSI with V4. I think it will though since the stock clutch almost did it.

[Former_Boosted_IS]

Originally Posted by dzenno

Daily driven 30k+ miles? Hopefully you're saying 30k is minimum with heavy track use/abuse...

Isn't yours a twin disk with organic on one?

I'm really hoping my situation turns out to be "odd" as otherwise there's no hope for this car and its clutches even with stock turbos when it comes to daily driving it it'd have to become a track-only VERY low-milage car..

I have a twin disc with ceramic full face with a segmented kevlar 8.5" discs.

[Former_Boosted_IS]

Originally Posted by R1000K3

You are right dzenno, it must be engine torque and nothing else... The actual torque on the wheels is of course a lot more but this is not seen by the clutch since this is generated by the gearbox and final drive.

I'll test if the organic ACT clutch can take some N20, but guess it will not be an easy task for it. N20 will only be used, if possible with this clutch, for special occasions. I'm quite happy if the clutch will handle the power good enough from about 20 meth assisted PSI with V4. I think it will though since the stock clutch almost did it.

Uhhh, the crank torque will be considerably higher than wheel torque by probably 15%

[farbmw]

Originally Posted by Former_Boosted_IS

I have a twin disc with ceramic full face with a segmented kevlar 8.5" discs.

What make did you go with?

[Former_Boosted_IS]

Originally Posted by farbmw

What make did you go with?

I have the Clutch Masters Twin Disc FX850. It has a lightweight flywheel and you can choose any combo of ceramic/kevlar you want. The 8.5" are HUGE discs. I went with the ceramic / kevlar combo.

[farbmw]

I am a little confused, while looking at what ACT has to offer, I don't understand the pricing, they have 3 clutches to choose from.

One is the street performance clutch which is good for ~467 lb of torque going for around $550 US and the other two are 4 puck and 6 puck race clutches which are cheaper at ~$465 US and both are good for ~560 lb of torque.

My question is why is the 4 and 6 puck clutches cheaper then the street performance? Because of more material?

Also putting in a better clutch, wouldn't that increase your torque? And right now the stock HP of the 335i and the torque numbers are almost the same (I think correct me if I am wrong), so if you are able to increase your HP to 500 then the torque would be lower then the HP but not by that much?

[farbmw]

Originally Posted by Former_Boosted_IS

I have the Clutch Masters Twin Disc FX850. It has a lightweight flywheel and you can choose any combo of ceramic/kevlar you want. The 8.5" are HUGE discs. I went with the ceramic / kevlar combo.

Nice! And you are able to use this as a daily driver?