z2898

I bought an RPS BC2 and installed it in June this year, the clutch worked fine for the last couple of months until I tried to tune the car on nitrous. The first time the nitrous turned on it blew through the clutch so I pulled it out and found the clutch to be completely worn out.
My car is a full weight F-body 3800lbs with driver and puts down 553hp 506ft-lbs to the wheels on motor with 4.10 gears. My nitrous set up is direct port .026 nitrous jets .020 fuel (200 shot to the wheels) I spoke to Rob from RPS in the spring and he assured me that the twin would be fine for my application. Since the install I have only driven 2000-2500 miles and less than 10 runs at the drag strip. I have mostly just autocrossed all summer and when autocrossing I start out and just leave it in 2nd.
I spoke to RPS and they said they wanted me to measure the disks and take pictures, so here they are...
flywheel measures .033" to bolt head
pressure plate .038" to rivet
Inner disk .294" thick
Outer disk .285" thick
floater disk .293" thick

z2898

Rob got back to me yesterday and said

Thank you for the pictures and info. Every second gear start in a
3800lb car is equal to 2-3 first gear launchs at the drag strip. Also
I am not sure if you are using the clutch to help rotate the car while
autocrossing, but anytime that your foot is pushing in or out the
clutch pedal the clutch is wearing. To get longer life out of the
clutch, if you are using the clutch to rotate the car be sure to cool
down the clutch after each run by leaving the clutch pedal pushed in
with the engine running so that air can circulate around the disc and
floater. If you do not cool the clutch after each run it is the same
as leaving your foot on the brake pedal after your run. From what I
see and read, the clutch needs a rebuild. A rebuild lists for
$1,795.00 but I give you the racer price of $1,436.00.

Kind regards,

RJ

z2898

so then I replied: Really the clutch is smoked? I had 7 autocross events this season and the first 2 events of the season were on a slipping tex oz700 with 10000 miles on it. I dont use the clutch at all except to start off so are you telling me that I wore out a $2000 clutch in 5 autocrosses and 10 drag strip passes and only 2000-2500 miles! And all you are going to offer me is -360 on a rebuild?!?!
It just doesn't seem like I got much use out of the clutch that I was told would perform so well!
Jason

z2898

Sorry that was lengthy my last response was sent yesterday, and havent gotten anything back from them. I just wanted to get all the facts out there.

0Will at RSI

Give me a call on Monday and we can help you get this resolved.

0Rob@ChampionMotors

I have the RPS triple carbon clutch, two season over 20 drag passes + street use took it apart still looks like new. 9.70 @157. 950rwhp 987rwtq. Maybe talk to them about upgrading to a triple.

miami993c297

Those carbon clutches are supposed to stay longer than any other...surprising!!!

Christian

z2898

The thing is when I measured the disks I noticed the flywheel material (flywheel has carbon material on it just like clutch disk)is a larger diameter than the rest of the disks so it shows an area that was not worn. It only shows .008 wear in the WORST spot! I think the disks had a defect which caused them to wear prematurely.

DJACK

I have my car in the shop with the same problem, less then 2000 miles.

69dodgecharger

When was your clutch purchased?

DJACK

I bought my clutch 2 months ago.

69dodgecharger

Anything come of this? Curious as I am about to order the same clutch

robz

I wish you luck but I hate when people post private messages on open forums. Just bothers me. I have heard a lot of good things about rps and know Rob to be a stand up guy.

I've taken a brand new, broken in clutch, [not rps] to the strip and had it slip on the first pass with no refund.

z2898

I called Will last Monday, we'll see what comes of it after the holiday.

0Will at RSI

I have some answers for you. Give me a call when you have a minute.

m R g S r

could it be a shim problem? i remember seeing a thread on here a few weeks ago where the clutch manufacturer recommended installing a shim, but in reality that shim was causing the clutch to slip under load....

DJACK

Any update on this?

BadMedcn

Djack.....

Twin RPS carbon, same issue, but on a non raced C5. Less than 6000 miles of normal road driving and in less than 12 months it is shot? Keep me inyour loop.....I'm very interested where this goes.

DJACK

I just got my clutch back from RPS - rebuilt...but it took months! Just for the record, this is my 2nd twin disk from them with less then 5,000 miles total.

EDinPA