16 replies to this topic

[Gabara]

Just bought a Exedy heavy duty Cushion button clutch, does that mean I'm Alot more likely to get crankwalk now was searching about it got me so woried now. Why is it less prone for a twin plate?

Thanks
Isen

[DOUGMO]

i dont think it is related to clutch at all, others beg to differ

[Seano_boi]

i believe some people say that its due to the shock loading during hard launches and the applied torque loading . and others say its not . . .

there is merits in both sides of the argument , i try steer clear of it to tell you the truth because everyone you talk too seems to have a different take on what causes crank walk ! ? !

I had a Exedy 3 puck paddle clutch in mine a fair while back , it was quite harsh and i ended up having to go to solid mounts to help stop the engine swinging around ! . after heaps of heavy driving / track days i never had a problem as far as crank walk is concerned . Engine was spool forged with big 16 g and all the goodies . . . i was running an NA crank in that motor because when the engine machinist measured everything up after i spun a bearing i was told that i had 'walk' in the first place and that the crank was unusable cos of the spinner ! . . . And i had a standard clutch at that time with not even a boost increase and they told me i had walk , so its got me beat ! .

Edited by Seano_boi, 03 May 2011 - 03:51 PM.

[milkandoj]

It seems like the only concrete and sure reason not to get crank walk or way not to get it is a 6 bolt motor lol.

Ive seen the topic debated so much on other forums and there some actual good info and theories around amongst all the bullshit. But guys still build all out motor and they walk, or they do all this extra work to try stop it being able to get crank walk and after all that i seem like they may have been better off building an converting to a 6 bolt motor in the first place, coz it walks.... ooo wait for the shit fight to start after that statement. It just doesn't seem like you can stop it, some don't get it making big power on stock 7 bolt blocks, and some spend big dollars building a motor and still get it!

[EVL20T]

Ive been running the cushion button for 3 years and have had no problems

[Gabara]

Thanks guys for info, looks like I'm going to chuck it in and enjoy the car if I do end up geting any sign of crank walk it gives me a good reason to buy and forge a 6 bolt =)

[DOUGMO]

If it was the clutch you would think the 6 bolt would do it too?
plenty of people run crazy heavy clutches with no issue.
My thoughts which a lot of people for a long time have not believed(seems magnus now believe also) is that the
check valves on the oil squirters jam open and bleed off the oil pressure to the thrust bearing.
this was also common in starions way back when.
6 bolts I believe have a seperate gallery hence they dont have the same issue as the 7 bolts.

[Gabara]

Yeah I'm with you on that one Dougmo, don't realy agree to the clutch theories. Alot of people have experience it first hand on the forem I was reading but it is awfully common in DSM.

[brisvr4]

Troy (jetgsr) has modified his thrust washers so they receive more oil I think.
Seems to have fixed his walk problems.

[Gabara]

Just a curious question EVOCPE how's the clutch in daily driving when stop starting in trafic is very harsh on the driveline shudder heaps?

[Gabara]

What do people suggest chuck the cushion button or sell it get my self a heavy duty save my self a gearbox, I'm only planning on having 220 kw and I drive the car everyday

[milkandoj]

What do people suggest chuck the cushion button or sell it get my self a heavy duty save my self a gearbox, I'm only planning on having 220 kw and I drive the car everyday

I don't recon a heavy duty will do 220wkw if you drive it hard

[DOUGMO]

go a jim berry or penrith brake and clutch custom for that power, penrith being the cheaper one

[Gabara]

Not planing to circuit or drag all the time, just abit of fun hear and there. That why I'm kinda leaning towards the heavy duty just don't know what to do with cushion button I just bought.

[Gabara]

go a jim berry or penrith brake and clutch custom for that power, penrith being the cheaper one

Thanks for that I'm trying to hit Exedy first see if I can interchange it with there heavy duty, already spent 680 bucks on the cushion button kit.

[EVL20T]

The cushion button is fine, holds the power down and no its not harsh on the street at all.. good thing about the cushion button is that you can ride it abit and its not just an ON/OFF like the brassbutton

[Gabara]

That's exactly what I thought evan coming from the Exedy website they say it's streetable, as long as it's not like brass I'm happy I wonder why most people say they shutter on taking off though just not keeping the revs high enough.

Edited by Gabara, 06 May 2011 - 11:54 AM.