Clutch Choice

[bloodzkull]

ok basically as part of my rebuild i will be going a new clutch

but i can't decide between a jim berry single or twin plate of some description.

car will be putting out at least 330kw at the wheels (what it was doing before rebuild) and only cams being changed so not expecting much more.

car is a 32 gtr and is NOT daily driven. only weekends or when i want to go out during the week and don't feel like driving the work ute.

[Cjmartz2k]

ok basically as part of my rebuild i will be going a new clutch

but i can't decide between a jim berry single or twin plate of some description.

car will be putting out at least 330kw at the wheels (what it was doing before rebuild) and only cams being changed so not expecting much more.

car is a 32 gtr and is NOT daily driven. only weekends or when i want to go out during the week and don't feel like driving the work ute.

330rwkw is twin plate on a 2wd. 330AWkw is probably going to be getting close to triple plate territory. No way a single would hold that kinda power.

[monga]

My mate recently got his Jim Berry clutch rated pushing 290rwkw in his XR6T, clutch is nice and holds the power well with alot of shudder, my twin plate exedy and hks before provided no shudder and reasonable driving and never slipped, now im pushing 500hp. Value for buck the Jim Berry is the way to go, be half the price of a jap twin plate.

Edited April 22, 2008 by monga

[bloodzkull]

hmmm i am sort of leaning towards an npc twin plate as i heard good things.

anyone have any feedback and contact details? also rough price?

[Swiper the Fox]

330rwkw is twin plate on a 2wd. 330AWkw is probably going to be getting close to triple plate territory. No way a single would hold that kinda power.

you are to be mistaken my friend...very much mistaken...

i raced a low 10 sec GTR for 3 years solid with a Jim Berry single plate...450 AWKW+

never slipped once and was one of the most reliable parts on the car.

now run a NPC twin plate which already needs attention after 20 passes.

[Piggaz]

Nismo coppermix twin

[Cjmartz2k]

you are to be mistaken my friend...very much mistaken...

i raced a low 10 sec GTR for 3 years solid with a Jim Berry single plate...450 AWKW+

never slipped once and was one of the most reliable parts on the car.

now run a NPC twin plate which already needs attention after 20 passes.

Truth be told, I've never heard of Jim Berry single plates (I'm in Japan) so I can't speak first hand of them. The clamping pressure must be huge on one of those. I know there is no Jap super single that could do that (ORC, OS GIKEN, etc.). I toasted a 1 month old ORC with just a RB25/TO4e on the initial tune! I run a OS Triple now.

[bloodzkull]

hmmm dirt garage do you think it is all clutch. maybe something not set up right? also how much did the jim berry clutch cost?

[some_cs_student]

Truth be told, I've never heard of Jim Berry single plates (I'm in Japan) so I can't speak first hand of them. The clamping pressure must be huge on one of those. I know there is no Jap super single that could do that (ORC, OS GIKEN, etc.). I toasted a 1 month old ORC with just a RB25/TO4e on the initial tune! I run a OS Triple now.

Well thats fair enough because Jim Berry is Australian, he's well recommended on these forums for his great clutches...

[grey pearl]

you are to be mistaken my friend...very much mistaken...

i raced a low 10 sec GTR for 3 years solid with a Jim Berry single plate...450 AWKW+

never slipped once and was one of the most reliable parts on the car.

now run a NPC twin plate which already needs attention after 20 passes.

Hi There dirt garage,I spoke to you a while ago on the phone and have since bought a single plate Jim Berry clutch partly on your comments,although I must confess I am more than a little bit worried about my choice of clamping pressure,4000lb especially in light of the fact that GTR'S have the consistent problem of cracking or breaking clutch pedal brackets.What clamp pressure was your single??Also why did you change to the NPC when you had such success with Jim's clutch??

Can I also ask you did you have to upgrade your pedal bracket to a Nismo one, or did you re-enforce it with weld, or leave it stock,if you have taken one out can you tell us the procedure to avoid damage to the dash etc as I think I'm going to take that pre-caution to avoid being stranded somewhere and having to wreck my re-coed gearbox to get home.Btw Jim and I chose the clamp pressure to hold 300-350kwatw to handle my future upgrades,although He doesn't like to quote kw that a clutch will hold,hope this is some help to the guy you replied to as well.Cheers Grey Pearl.

Edited April 28, 2008 by grey pearl

[grey pearl]

My mate recently got his Jim Berry clutch rated pushing 290rwkw in his XR6T, clutch is nice and holds the power well with alot of shudder, my twin plate exedy and hks before provided no shudder and reasonable driving and never slipped, now im pushing 500hp. Value for buck the Jim Berry is the way to go, be half the price of a jap twin plate.

Hi There Monga,I am surprised that even though you report a lot of shudder with the Berry clutch that you still recommended it over the other ones, what price do you put on shudder or was it a typo error and you mean't not a lot of shudder with the Berry clutch.Cheers Grey Pearl.

[BezerkR32]

Dont be mistaken in thinking that increased clamp means increased pedal effort...

Jim berry is the clutch guru. I could not recommend him highly enough. He has gotten me out of trouble on several occasions with conversions etc. an example of a clutch he did for me was a heavy duty organic behind a 1J. Clutch was originally done bt Dellows through some clutch mob in Penrith. Required that much pedal effort that it bent the pedal box. I sent entire clutch & flywheel assy to jim, came back with 40% less pedal effort required and had 20% more clamp. Have also run Jims Full monty single on many a 300kw GTSt and the odd 350kw GTR with excellent results. have a 3900lb solid ceramic going behind my LS1. this guy dose clutches for targa cars and consults for many clutch manufacturers. You have made the right choice.

Hi There dirt garage,I spoke to you a while ago on the phone and have since bought a single plate Jim Berry clutch partly on your comments,although I must confess I am more than a little bit worried about my choice of clamping pressure,4000lb especially in light of the fact that GTR'S have the consistent problem of cracking or breaking clutch pedal brackets.What clamp pressure was your single??Also why did you change to the NPC when you had such success with Jim's clutch??

Can I also ask you did you have to upgrade your pedal bracket to a Nismo one, or did you re-enforce it with weld, or leave it stock,if you have taken one out can you tell us the procedure to avoid damage to the dash etc as I think I'm going to take that pre-caution to avoid being stranded somewhere and having to wreck my re-coed gearbox to get home.Btw Jim and I chose the clamp pressure to hold 300-350kwatw to handle my future upgrades,although He doesn't like to quote kw that a clutch will hold,hope this is some help to the guy you replied to as well.Cheers Grey Pearl.

[Swiper the Fox]

Hi There dirt garage,I spoke to you a while ago on the phone and have since bought a single plate Jim Berry clutch partly on your comments,although I must confess I am more than a little bit worried about my choice of clamping pressure,4000lb especially in light of the fact that GTR'S have the consistent problem of cracking or breaking clutch pedal brackets.What clamp pressure was your single??Also why did you change to the NPC when you had such success with Jim's clutch??

Can I also ask you did you have to upgrade your pedal bracket to a Nismo one, or did you re-enforce it with weld, or leave it stock,if you have taken one out can you tell us the procedure to avoid damage to the dash etc as I think I'm going to take that pre-caution to avoid being stranded somewhere and having to wreck my re-coed gearbox to get home.Btw Jim and I chose the clamp pressure to hold 300-350kwatw to handle my future upgrades,although He doesn't like to quote kw that a clutch will hold,hope this is some help to the guy you replied to as well.Cheers Grey Pearl.

I chose an NPC item due to the fact Mark Jacobsen has had great success with them and Croydon's always treated my choice of single plate with dismay. So i thought id try the NPC item as im producing over 900hp at the flywheel and simply thought that was beyond what a Jim Berry single plate (as good as they may be) could handle. Also looking to soon turn the NOS on in the car pushing that flywheel power figure in excess of 1000hp.

Never modified any of the clutch parts from STD factory issue (clutch cylinders, brackets etc)

Edited April 29, 2008 by DiRTgarage

[grey pearl]

Dont be mistaken in thinking that increased clamp means increased pedal effort...

Jim berry is the clutch guru. I could not recommend him highly enough. He has gotten me out of trouble on several occasions with conversions etc. an example of a clutch he did for me was a heavy duty organic behind a 1J. Clutch was originally done bt Dellows through some clutch mob in Penrith. Required that much pedal effort that it bent the pedal box. I sent entire clutch & flywheel assy to jim, came back with 40% less pedal effort required and had 20% more clamp. Have also run Jims Full monty single on many a 300kw GTSt and the odd 350kw GTR with excellent results. have a 3900lb solid ceramic going behind my LS1. this guy dose clutches for targa cars and consults for many clutch manufacturers. You have made the right choice.

Thanks for the reply mate and the re-assurance, as I hadn't read too many people running 4000lb clamp on this forum, and a reputable garage in melbourne bagged the crap out of using Jim Berry clutches saying they require too much travel to engage gears properly,I guess only time will tell how suitable my choice has been, will let you all know.Grey Pearl.

[grey pearl]

I chose an NPC item due to the fact Mark Jacobsen has had great success with them and Croydon's always treated my choice of single plate with dismay. So i thought id try the NPC item as im producing over 900hp at the flywheel and simply thought that was beyond what a Jim Berry single plate (as good as they may be) could handle. Also looking to soon turn the NOS on in the car pushing that flywheel power figure in excess of 1000hp.

Never modified any of the clutch parts from STD factory issue (clutch cylinders, brackets etc)

Thanks for your reply and explaination, I am purchasing a Nismo clutch pedal bracket, which Nismo claim is 1.75 times stronger than stock GTR one anyway as a precaution to install at the same time as my upgraded gearbox and clutch and a stronger better designed clutch fork pivot as well.Cheers and thanks for your advise on the phone Grey Pearl.

[grey pearl]

330rwkw is twin plate on a 2wd. 330AWkw is probably going to be getting close to triple plate territory. No way a single would hold that kinda power.

Hi There mate, Can I ask what you did to your engine to get that power.Cheers Grey Pearl.

Edited April 29, 2008 by grey pearl

[On Edge]

Hi There mate, Can I ask what you did to your engine to get that power.Cheers Grey Pearl.

HKS 2530's will make 330rwkw + with relative ease mate