JP4mance Tuning Parts

iTrader: (9)

We're now stocking the full range of Stage 2 & Stage 4 clutch kits as well as light weight flywheels from Competition Clutch.

Details of both kits are available @ JP4mance.co.uk here:

http://www.jp4mance.co.uk/products/1/subaru/drivetrain

Stage 4 - 6 puck cerametalic


Stage 2 - Street Series Carbon Kevlar

tempop1

What powers are they capable of running?

happydude303

iTrader: (1)

i now the stage 2 can carbon kevler one can take 330bhp as i have tried and test one but didnt like 350bhp if thqats any help

JP4mance Tuning Parts

iTrader: (9)

The stage 2 kit is rated for an estimated 80% torque capacity increase over stock and should be considered a 'FAST ROAD' clutch which provides a little extra clamping force to avoid slip under load, but retains good driveability and logetivity with the full faced friction plate.

The stage 4 is rated for an estimated 250% torque increase over stock. The high clamping load makes this ideal for much higher torque ratings. The lighter, 6 puck, ceramic drive plate is lighter and heat resistant which makes this clutch ideal for track day use where fast and frequant clutch engagement occurs.

My advise would be to use a clutch with a max torque capacity within 10% of the cars estimated max torque figure at the flywheel, given consideration to the cars intended use i.e Road, track or drag strip?

Engine BHP isn't a good way to decide upon a clutch or measure it's capabilities.

happydude303

iTrader: (1)

i have stated what i have found that the stage 2 clutch would not take 350bhp 340ft but it would take 330bhp 320ish ft as i have had this on my car and at both these level peeple have a right to no.. this the figures you qoute say that this will be able to take another 192ft seen as most sti have around 240ft p.s i only used my car for road use liek i say this stage 2 would be good for a lighty modded car any thing more then 320ft and it would just not be good enough

JP4mance Tuning Parts

iTrader: (9)

The figures quoted are the manufacturers own and we advise our customers accordingly. We've not had a clutch sent back to date.

For what it's worth my STi is running 330bhp/ 333 ft lb and the stage 2 is fine.... no doubt if i wanted to i could give it death from the traffic lights and it would eventually slip, but for sensible fast road use its perfect. It's down to the individual driver at th eend of the day.

happydude303

iTrader: (1)

yeah i agree to some extent and im not knocking them for that power level and p.s i do not launch my car of the lights, this test was done by loading the car from 70mph in 6th and 5th was where it was slipping and at this speed is where you need the clucth to hold and not slip but for the money and that power level they are a ok option

JP4mance Tuning Parts

iTrader: (9)

In which case there was something wrong with the clutch or the fitting IMO and it should have been sent off for warranty testing. This isn't a problem i've come across before in all the time we've sold these kits.

Beat the VAT increase and get orders in before xmas guys

Mad Hammer

iTrader: (55)

Any of your customers using the stage 4 with big torque ? Rated to circa 650 ftlbs ?

Clive

JP4mance Tuning Parts

iTrader: (9)

I've had a couple of customers fit stage 4's on track cars pushing the boundries of 500ft Lb with no problems, but 650ft lb is somin else!

I'd consider a multi-plate clutch for this sort of power to be honest. Send us a PM and i'd be happy to quote a few brands / applications we have available.

Mad Hammer

iTrader: (55)

Was just looking at the 250% and going from there. I use a twin in my drag car anyway I was looking for something to handle circa 450 in my other car. Was looking at ACT in the states but this may be an option if it's proven.

Clive

JP4mance Tuning Parts

iTrader: (9)

The stage 4 is good for 450ft lb on the road or circuit. I wouldn't suggest using it for high torque standing starts though.

Mad Hammer

iTrader: (55)

Thanks for your honesty, need something to handle drag launching too.

JP4mance Tuning Parts

iTrader: (9)

i'll PM you.

JP4mance Tuning Parts

iTrader: (9)

BTT