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Clutch Run In Question

AngryRB
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Hadouken Grand Master

Hadouken

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Posted

I was in exactly the same boat. I asked my workshop what they think. Seeing as they were tuning and installing the clutch.

They said it will be fine. I did however see them do a run in period on the dyno.

It will be interesting to see what others think.

My clutch is still brand new but it's holding up fine. I'm not launching or clutch kicking. Just driving normally.

AngryRB Grand Master

AngryRB

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Posted (edited)

i have exedy HD which isnt that old, but im not sure if it will hold upto 300kw on the dyno, so am thinking bout doing the 300kw clutch to make sure theres no issues, and the dyno time isnt wasted.

anyone has an opinion on wether i should just see what happens or definetly fit the 300kw clutch.

Edited by SliverS2
Duncan Grand Master

Duncan

Posted
Posted

FIt the new clutch for sure. No point getting on the dyno and the old ones slips during power run. Also expensive to have everything apart twice.

The bedding process is most important to stop it slipping instead of engaging when you let the clutch in or out. Once it is fully engaged it is much less likely to start slipping, dis-engaging again. They won't be dropping the clutch on the dyno

BTW make sure the flywheel is machined unless it is new. Uneven surface from the old clutch, especially if was badly worn, on the old flywheel is the biggest risk.

I have taken new clutches straight to the race track for full power launches. Only had one of them fail due to not being bedded in properly (had a small contact patch, got to hot and clutch welded to flywheel).

AngryRB Grand Master

AngryRB

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Posted

i think i will put the clutch in to save dissapointments on dyno day, im thinking the NPC 300kw rated organic clutch

couple of questions

1) What is the proper clamping pressure that i need for the result just so i know what im buying?

2) I want a good bite and a firm to quite firm pedal so does this mean i want SPRUNG or UNSPRUNG center if that makes sense? ( not sure what makes the pedal feel more firm)

the exedy i have has a soft pedal feel and lacks a good bite, so i dont wanna get it wrong.

tricstar Mentor

tricstar

Posted
Posted

i think i will put the clutch in to save dissapointments on dyno day, im thinking the NPC 300kw rated organic clutch

couple of questions

1) What is the proper clamping pressure that i need for the result just so i know what im buying?

2) I want a good bite and a firm to quite firm pedal so does this mean i want SPRUNG or UNSPRUNG center if that makes sense? ( not sure what makes the pedal feel more firm)

the exedy i have has a soft pedal feel and lacks a good bite, so i dont wanna get it wrong.

the answer to both those questions will be answered by the good folk at NPC, just talk to them and tell them what you want.. but if you are going to be running 300kw surely you would get something rated a bit higher so your not right on the clutches limit?

sprung or solid centre is not what determines pedal firmness :thumbsup:

AngryRB Grand Master

AngryRB

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Posted

Exactly.

yeah thats true, i have bad memories of the 5puck clutch that was in there 6months ago, i couldnt drive it and it was shaking the crap out of the whole driveline,

so that power level is probably verging on the edge of the organics limit and more in the ceramic button zone, is the cushioned button clutch anything like the 5puk?

cause its really the two options i think for around 300kw, also i dont often hang on the redline or do dumps/drifting etc

my uses is 80% easy driving streets and 20% drags so id expect a clutch to last a long time

AngryRB Grand Master

AngryRB

Posted
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Posted

I have a npc 650hp sprung button clutch and it drives beautifully.

I think my previous 5puck may have been worse than it should of cause the flywheel must be a bit worped, when it got taken off the car it was only wearing on one half,

I drove it for a week and just couldnt get used to it, the gearbox was taking a hammering, was making all sorts of noises, was thinking it was going to break.

I hear the NPC 300kw clutch is a good one, maybe it can be made slightly stronger again to handle a bit more

AngryRB Grand Master

AngryRB

Posted
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Posted

what do you guys think about the Exedy sports organic, on the kudosmotorsport site, they have 3 options

225kw, 285kw and 330kw( 2922lbf clamping pressure which is 50% increase over standard)

there $534 ,

what do people think about the 330kw option?? would that be as good as the NPC clutch or a cushioned button?

MrStabby Grand Master

MrStabby

Posted
Posted

I'm using the 300kw NPC organic, on a 305kw GTR, but i'm gentle on clutches. Very happy with it, as its easy to use in heavy traffic. My previous 240kw rated clutch handled 305 without slipping, but when the throw out bearing died it was a good opportunity to put something more suitable in.

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