What's Better - R33 Gtr Jim Berry Or Nismo Coppermix Clutch?

[34GeeTeeTee]

Oh f**k sorry to hear that mate....

Well, I'll be able to give you a genuine assessment on a Jim Berry clutch while your engine is out..... But I think that'll be the least of your worries.....

Hope you get it sorted, can you do a build thread? I love build threads

[Hadouken]

Whilst the engine is out, you might as well spend the coin and take care of oil control and get some forgies in there.

[Shoota_77]

Whilst the engine is out, you might as well spend the coin and take care of oil control and get some forgies in there.

Already a forged engine but definately plan to look at oil control. Oil drains in head, cam baffles (can do anytime obviously) and sump baffles at a minimum.

Build thread? Dunno if it''ll be interesting enough! But then again..... Pretty tempted to look at RB30/26.. Might offload some Datsun stuff and see what I can afford. I''ll do it all myself so could be worthy of a thread.

Might go research the RB30...

[34GeeTeeTee]

Any RB is interesting and it sounds like you have the right gear!!! Build threeeead

[ARTZ]

Oops!!! My bad! Ok, NPC in consideration now (to keep Hadouken happy!)

Any pics of an NPC setup?

jim berry is a rebuilt from your old clutch parts, where NPC is made from all new bits...

for the price of a Jim berry you can get a NPC brand new clutch with new lighter flywheel as well which is recomended to keep the clutch cool

will look something like this but newer, this is a rebuilt one...

only done a few thousand ks on mine but I love it

[Shoota_77]

Looks good. Makes it pretty good value including the lightened flywheel.

Is it really ''bitey''? Being sprung I spose it's not too bad?

[Hadouken]

for me, it bites on cold mornings for about 5 min. After that its shweet

[ARTZ]

yeah its a ripper price, 750 for clutch 400 for flywheel..flywheel is 6.5kg I think so not too light either..

was a bit rough for first 500kms or so but once worn in its really nice...just remember it is a button clutch so may be a little harsh if you spend a lot of time in traffic or do alot of hill starts..the pedal is very sofrt/light though and it hasnt bothered me at all though...

if its a daily and your not pushing 300kw+ and you like to lend the car to your grandma, you may be better off with the organic..

if its more a mans toy with 300kw or more and you like to dump clutch and flog it a bit, def go the carbotic..

.

[Piggaz]

Have driven a few JB clutches. Yeah, no. Not a fan.

My Coppermix twin has done no less than 250 big RPM launches in its life (been in the car for 7 years in total). Pulled it out when I lunched then engine and its going straight back in. No rebuild, no new plates, no nothing. (There is pics of the plates in my build thread)

Feels a tad heavier than standard (esp with the Nismo slave).

There has been many threads about these things. Everyone that owns one won't use anything else. Speaks for itself I think.

[Shoota_77]

Ok, I'm leaning Nismo then. I f'ing hate shuddering on take off from grabby clutches. My powerless Datto 1200 ute has a solid clutch (god only knows why!!!) and it shites me to tears in traffic! You look like a clown every time you try to creep off. It's like a switch, on or off. Shite.

[ARTZ]

yeah if you can afford it def get the coppermix and it looks like you can...

you have a much better car than i do, I didnt consider my car worthy of such expense.. actually I only paid half price for the npc..

it is a great clutch though..

[34GeeTeeTee]

Depends on the car, depends on the power and depends where u wanna go with it.... I had a good chat to NPC but there was nothing off the shelf for me, it had to be modified to suit the power level... They were very helpful, but believe what u want when people talk power ratings.... How do you measure a clutch rating?

[Hadouken]

When ypu talk clutches, you talk torque

[ARTZ]

NPC do an off the shelf twin plate as well...that wasn't good enough for you Mat?

Also Simon S14 is hard drifting 360kws with a carbotic and said it performs great, it was on his recomendation I got one..so I'm curious why wasn't it good enough for yours?

[34GeeTeeTee]

NPC do an off the shelf twin plate as well...that wasn't good enough for you Mat?

Also Simon S14 is hard drifting 360kws with a carbotic and said it performs great, it was on his recomendTion I got one..so why wasn't it good enough for yours?

Which then needs a pull to push conversion I think he said, plus twins are generally noisy and annoying...

NPC said they would need to modify the off the shelf item (the puck clutch shown) and it would be piggish in traffic... Not really a fan of that, they were great to talk too though... I said I needed one that could handle 400kw of all styles of driving...

I guess we will see how my new one goes and then I can actually give some legit feedback...

The couple of people I spoke to with JB clutches rate them highly and wouldn't look at anything else, soooooo I'll see how mine turns out, IF it's no good I'll go NPC but I doubt that'll be the case....

BTW I didn't think lightened flywheels were an advantage on an RB? What pros & cons are there?

[ARTZ]

Not many...this one has cooling channels in it..I think they help cool it when in traffic and such..Apparently this was a problem with JB clutches getting too hot as well and shortening their lifespan..

Flywheel being lighter can help bring revs up quicker, unfortunately it can also help them drop quicker when changing gears... this one is o ly a few kg lighter than stock so it's not too dramatic

It does drive like a button not a stock clutch. But it is very easy to live with, I can't imagine the JB being any better really..I haven't driven one though..

[34GeeTeeTee]

I think the standard weight flywheel is the go, I haven't heard of a clutch overheating... Even though I literally cooked mine (from epic slip)... I believe that the clutch plate will have more puks spread around it which may maker it more user friendly BUT I dunno yet, I'll find out next week when it arrives and report back so OP has a genuine bit of feedback on then

[WMDC35]

i'm using single coppermix, at 340rwkw, it's awesome, going to around 360 soon so see how it holds, mainly only road use so expect it should be fine

[ARTZ]

not overheating as such but just getting hotter than it should....probably from trying to ride it when it doesnt want to be ridden..

Anyway NPC recomend 1 thing JB recomends another...both work so meh, prolly doesnt matter what you get really ..

i probably would of gone the twin plate from NPC over the JB...or was it not recomended

[Hadouken]

My next clutch if this one ever gives up, is a twin from npc