I am still amazed at the limits we have pushed on the JWT clutches & flywheels.

We have punished some of our clutches for more than 2 years, over 20K miles, and well over 600 lb.ft. of torque and never a problem. These clutches are well made to say the least and definately under-rated.

Now that our Time Attack car is pushing into the 7xx hp/tq numbers it is finally time to retire the original JWT clutch & flywheel and with a little help from GT Spec add the Carbonetics triple disc to the mix.

As this dyno chart shows, the abused JWT clutch is starting to slip after severall 700 hp pulls on just under 18psi. and almost 2 years of track abuse at well over 6xx lb.tq. (on the old turbo kit)




Now that we are getting the new JWT prototype monster cams installed into the motor and the addition of the new clutch, I can't wait to see what type of numbers we can come up with. More importantly is how much USABLE power we can come up with.

 

Are these the standard JWT Clutch and Flywheels that are offered to the public or are they the specials ones you have to call in to order?

 

Standard.

Here is a link to the products......
http://www.jimwolftechnology.com/customer_results.asp

 

thats good to hear!

 

Good to know! Maybe that will be the next set up I go with...

Currently on stock clutch/flywheel at 75,000 miles... last 20,000 miles of which on Stage 3 stillen supercharger

 

i just find it hard to believe that a organic clutch withstood all of this "abuse". Isn't the jwt clutch essentially the same as a stock clutch w/ just a larger friction surface?

 

are your dyno numbers higher than most others? what correction factor is being used.

I don't see anyone else getting into the 700 rwhp range with only 18 psi.

I am not trying to be inflamatory, just curious as to the limits of the JWT clutch. It seems to be giving way now that you are at the 700WHP mark, but others are having troubles with traditional single plate (non carbon) clutches holding more than 550-600 whp.

 

Im not going to even get started on my "real" thoughts. No offense to Scott, but I know many people that have made those clutches slip at 400-450whp drag racing, so I find it VERY hard to brelieve it would take 300more whp road racing. Then again, when are we going to see a "legit" dyno of your 700whp car?

Im not discrediting JWT as I know its their dyno (and always Scott's defense), but we all know that dyno is optimistic and my dog could spin the rollers to produce 400ft/lbs on it.

For the record-I am not trying to be disrespectful and get banned, but come on, when are we gonna see a DJ of these hp claims especially at the boost levels claimed? THEN can we BEGIN to give any credibility to this post regarding this clutch IMO.

BTW-your telling me your NOT running the upgraded friction disc JWT offers?

 

With all due respect to the forum mods, just adding some constructive comments - +1 on the DJ dyno & that is the ugliest torque curve I've ever seen on a TT VQ motor...

My JWT Clutch/Flywheel was great on NA power levels, and slipped like crazy with 500whp… I upgraded to the Carbonetics Triple Carbon and haven’t had a single issue since.

 

I have the jwt clutch and flywheel and have no problems with it with 400whp. Idon't drag though and I don't really think i have dumped the clutch at high rpms. The only complaint I have with it is that it feels way to soft for an aftermarket.

 

we have made 620 to the wheels in 5th gear in a Z on race gas with the JWT combo, no doubt that its a good clutch combo thats affordable.


im sure that everyone at JWT knows that there dyno is strictly for same day comparisons and to see if what they are doing is making a power difference, not to compare them to other dynos...

 

i guess

 

i gotta agree with alberto and philthy. Someone who is not informed may have ran out and wasted their money on this clutch for a built motor project. I know i would have.

 

well its waste if you are running higher that 550 and you track the car...

i must say i truly find it hard to believe too but i know mike B. has run in in his track Z for quite a while.....

scott, maybe you can take some pics of the jwt clutch after its out of mike b's Z

 

That car is running JWT BB850's though.

 

Is this car running stock headgaskets and headstuds also?

 

you have to notice that the scales are different for HP and TQ. it wouldn't look so ugly if they were using the same scale.

look:

TQ axis goes from 261 - 692
HP axis goes from 104 - 702

 

My comment was in reference to the TQ 'curve' - the scaling doesn't change the fact that it's ugly as heck - peak and then complete drop off... I also haven't seen a car make more HP than TQ below 5250rpms...

 

How could they be standard ones Scott? At first I had Sharif install a RPS Clutch and Flywheel that was good for up to 600 rwhp, but he burned it out on the dyno with just a few runs....it could not hold the TQ. I just cannot see a standard clutch holding that much TQ. Did your clutch hold because of the kind of dyno you used ?

 

its the voodoo version of the jwt clutch