[tscdennab]

As I see in your picture, the clutch plate has no springs. What is the influence of this feature on driving the car ?

[Sal G@Camber-Toe]

very nice

[Irishace]

Originally Posted by TT3 iN NyC

Chris, what do you have in store for us 6AT guys. I don't think our 6AT trannies can handle 600lbs of TQ. What steps is HpF going to take for us?

Thanks.

+1 here, really interested in HPF is doing anything with the ZF ATs. Its going to be a big factor in my decision to keep modding my car. Appreciate any info.

[Zeph]

It is ironic this thread just came out, as I am looking for a clutch/flywheel combo soon after going to the strip this past Friday

[HPF Chris]

Originally Posted by Zeph

I guess, like you are drag racing and you make a quick shift from 3rd to 4th gear and the car just doesn't accelerate for like 1/2 a second (feels like forever lol). Since I have tried 3 tunes, I was hoping it was just clutch related or something

Zeph

It is very possible your clutch is slipping. Let me know if you need one from our first production run. We will be shipping them out next week.

Originally Posted by Irishace

+1 here, really interested in HPF is doing anything with the ZF ATs. Its going to be a big factor in my decision to keep modding my car. Appreciate any info

Not yet. We will at some point however.

Originally Posted by
very nice Sal G@Camber-Toe

Thanks.

Originally Posted by tscdennab

As I see in your picture, the clutch plate has no springs. What is the influence of this feature on driving the car ?

The factory clutch disk is unsprung as well. The dampening occurs in the dual mass flywheel.

Originally Posted by Zasquatch

In the other thread you mentioned this would cost just over $1,000.00...... Why? Honestly, what makes this clutch cost over twice as much as an ACT clutch? With some searching one can find an ACT street for a little over $400. I'm genuinly curious.

The HPF Feramic clutches are considerably more expensive to make. The material is what makes the engagement so smooth, and the costs to make the pressure plate is also considerably more. No company has matched our single disk clutches in the E46 M3, and the same materials are holding in excess of 1,000rwhp with butter like engagement on the M3, Supra and Viper. If you want to spend less, then go try the other brands out there. The downside is the new clutch will mate to the flywheel so if it fails or you don't like it, you may need to replace the flywheel the next time around.

Originally Posted by Rotorocious

Cost!?
My clutch slipped tonight

edit: previously said a little over 1k

I'll PM you the price and link.

Originally Posted by onesuperboi

Very nice. But unfortunately while watching the video, I was thinking about the HPF's claim that the exhaust has no drone...

The HPF exhaust wasn't in that car. I didn't hear much drone if any when driving that car. I actually really liked the exhaust note.

Originally Posted by Bakeme521

I want to see how it engages on a clutch dump, just to see a nice burnout.

Oh yes... Let's do it Tim!!!

Originally Posted by mikeith

i felt mine do this the other day but it only does it like dtc is kicking in or something. because it only happens if its in a lower traction situation.... yet i have dtc completely off. running v5 on 7-29 map and you can here the tires slipping through first, fast shift into second, what would be a hard chirp or break loose into second and it feels like i just speed shifted a damn honda civic for a second for second because it COMPLETELY cuts power but doesnt show a dtc light or anything since it is already fully disengaged. half second later power is back and it starts pulling like a beast again.

What does the boost and A:F do. I'd be curious to see if you are losing boost or if the clutch is slipping.

Originally Posted by intracacy

When will this be released?

Now... I'm PM you the link.

Chris

[amrazM]

I'll get this when you release a 750RWHP turbo kit.

[XPO186]

no lightweight flywheel option?

[Sal G@Camber-Toe]

Mind shooting me a pm also

[vasillalov]

Originally Posted by XPO186

no lightweight flywheel option?

Why, are you in a rush to loose some torque and get more vibrations in the car?

[Alpina_B3_Lux]

Originally Posted by HPF Chris

The HPF Feramic clutches are considerably more expensive to make. The material is what makes the engagement so smooth, and the costs to make the pressure plate is also considerably more. No company has matched our single disk clutches in the E46 M3, and the same materials are holding in excess of 1,000rwhp with butter like engagement on the M3, Supra and Viper. If you want to spend less, then go try the other brands out there. The downside is the new clutch will mate to the flywheel so if it fails or you don't like it, you may need to replace the flywheel the next time around.

If you apply your logic to your clutch replacing the stock clutch, wouldn't you also have to replace the stock flywheel at the same time (as it has previously mated to the OEM clutch)? Or would you recommend to at least have the OEM flywheel resanded?

Alpina_B3_Lux

[bmwm3redblack]

Chris are you gonna suggest some clutches for us xi 6sp manual guys???

[XPO186]

Originally Posted by vasillalov

Why, are you in a rush to loose some torque and get more vibrations in the car?

Care to explain how you LOSE torque when dropping mass from the flywheel?

[plague]

Originally Posted by HPF Chris

That is coming.

[vasillalov]

Originally Posted by XPO186

Care to explain how you LOSE torque when dropping mass from the flywheel?

It has to do with rotational inertia of the fly wheel. Read up on it.

EDIT:

Aah, wth: Here is the quick and dirty explanation:

For high torque output: use big valves, long equal length intake runners, heavier flywheel
For high horsepower output: use smaller valves, shorter intake runners, lighter flywheel

[ETS Michael]

If you need to put a clutch in a 335i just let me know

[XPO186]

Originally Posted by vasillalov

It has to do with rotational inertia of the fly wheel. Read up on it.

EDIT:

Aah, wth: Here is the quick and dirty explanation:

For high torque output: use big valves, long equal length intake runners, heavier flywheel
For high horsepower output: use smaller valves, shorter intake runners, lighter flywheel

I'm not really technical, but i'd like you to put it in layman's terms for me.

Btw, that doesn't explain anything. All that is is a recommendation with no rational or reasoning behind it.

[ETS Michael]

One thing you guys may consider before jumping on the aluminum flywheel bandwagon is when fermamic material is heated up multiple times without cool down between runs it can actually weld to the flywheel and cause all kinds of fun

Thanks,

Michael

[XPO186]

Thanks Michael... now that's some information I can actually use. Are other clutch materials more lwfw friendly? What exactly is the advantage of "feramic"? Stock like slippability and clamping power?

[F80M]

Originally Posted by HPF Chris

That is coming.

I'll sell one of my kidney and sperm in the mean time.

[JD75]

Hey Chris,

please PM a cost inclusive of shipping to Sydney Australia, for a 135i kit.

To be honest $1,000+ for a clutch kit seems a little excessive, however I was very impressed by the drivability you demonstrated in your vid.

I have managed to toast up an ACT "Street" clutch at the drag strip, following my first outing with 275 Hoosier Drag Radials on the rear.

FYI,

the ACT clutch held up just fine for all other purposes and I am making 550 hp at the "crank", give or take.

Can I assume your new FERAMIC surfaced clutch will hold 6,000 RPM launches out of the box at the strip, with very grippy Hoosiers on the rear?

Cheers,

JD.

[HPF Chris]

Originally Posted by JD75

Hey Chris,

please PM a cost inclusive of shipping to Sydney Australia, for a 135i kit.

To be honest $1,000+ for a clutch kit seems a little excessive, however I was very impressed by the drivability you demonstrated in your vid.

I have managed to toast up an ACT "Street" clutch at the drag strip, following my first outing with 275 Hoosier Drag Radials on the rear.

FYI,

the ACT clutch held up just fine for all other purposes and I am making 550 hp at the "crank", give or take.

Can I assume your new FERAMIC surfaced clutch will hold 6,000 RPM launches out of the box at the strip, with very grippy Hoosiers on the rear?

Cheers,

JD.

It is perfect for your set up. I'd recommend our stage 2 which has a 2600 lb pressure plate. I also recommend running a factory OEM flywheel for high rpm launches and doing a full 300 mile break-in. The OEM flywheel dissipates heat way better than lightweight flywheels and it also helps you get out of the hole due to the extra weight on the end of the crankshaft. It also resists warping under heat which can often happen with an aluminum flywheel. The longer break-in allows the clutch to mate all the way across the disk. We run these nearly identical clutches full tilt with no break-in on every HPF turbo'd M3. However, if you are going to do high rpm launches with slicks I recommend doing a break-in.

Chris.

[HPF Chris]

Originally Posted by ETS Michael

One thing you guys may consider before jumping on the aluminum flywheel bandwagon is when fermamic material is heated up multiple times without cool down between runs it can actually weld to the flywheel and cause all kinds of fun

Thanks,

Michael

All clutch disks except the factory organic disks can weld themselves to lightweight flywheels. It may even be possible to weld an organic if you slip it long enough but I have never seen this occur. The reason the HPF feramic is so popular and "doesn't" exhibit this behavior is because the melting point of the material is so much higher (1200 degrees) than the other clutch disks on the market. The other reason is because it uses a full face clutch surface instead of 4 or 6 pucks taking the entire load of the engine. HOWEVER, even with the HPF Feramic if you take it out without a break-in and do very hard, long, high rpm launches with a lightweight flywheel and very sticky tires it is "remotely" possible to fuse this clutch if you can get enough heat in it. In the past when I have seen fused clutches of any type, I've often (about 50-75% of the time) determined the cause to be that one or two of the pressure plate bolts backed out.

Chris.