Mike454SS

iTrader: (4)

I'm willing to spend the money on the right clutch for me...the setup is a twin turbo iron 370, pushing over 900 rwhp...in a very very heavy car (B-Body...4200ish pounds).

I'm looking at the LS9R and wondering if a Katech rating of 960+ equates to more power than a Spec rating of 1395 or 1695...Katech is ALWAYS a very impressive company to deal with, and their reputation is amazing...

I'm not trying to call either vendor out, or cause any argument, I'm just curious if anyone has run both, or if anyone has installed both in customers cars, and what feedback they have about both clutches. The car is heavy, I understand thats going to be harder on the drivetrain...it's going to be driven on the street as well as making some track passes...and it's NEVER EVER getting a torque converter. Please let me know what you think.

redtail2426

iTrader: (10)

That doesnt seem like a fair match.Katech would be much higher on the list over a spec clutch,Really no comparison.How much power are you making?If its under 900 then get the katech and dont look back

SPEC-01

iTrader: (2)

Mike, based on your output and specified weight I would suggest the PT version of our Super-Twin. It will provide great capacity and drivability. It is also completely rebuildable which means that you can upgrade or rebuild the unit in the future as your output changes or wear occurs relative to use.

Redtail, I am not sure that I understand your statement. If memory serves they are offering a stock based LS9 kit, with a flywheel that allows fitment of the kit to the LS1. Whereas our kit is a fully purpose built billet Super-Twin that is completely rebuildable with 4 different versions, each designed to provide a different capacity and each set-up for different usage types in mind. Let me know if you all have any further questions about this and I will be happy to assist.

Mike454SS

iTrader: (4)

Jeremy, would you prefer I contact you via PM or via e-mail about a clutch?

Katech's top offering is upgraded over a stock ZR1 setup, it's using mostly GM parts and their custom flywheel...but it's not just a stock LS9 setup.

I've been building this setup for several years now...on the budget of "this is the right part, now I will put money away until I can buy it"...I haven't cheaped out on anything...the engine is finally done...the 32 spline T56 with every upgrade I know of is built (by me...hope I didn't mess up)...I just want to be sure that whatever clutch I go with, isn't going to cause me to kick myself for not going with an extremely built 4L80E...I've got the cash on hand for the clutch...and I know I'm asking a LOT of every drivetrain part given the power/torque output, and the weight of the car...and the fact that while I will primarily be on the street with it...I do fully intend to bolt the slicks on and let the car have it at the drag strip too...so I really want to make sure I buy something that I not only feel is right...but that whatever company provides it, is willing to say "yes this is going to work well" and then stand behind it when I finally get it installed.

SNLPerformance

iTrader: (15)

For what you've described I'd purchase the Spec when comparing those two. Jeremy will get you taken care of.

BarneyMobile

iTrader: (4)

If you have the money would you consider an RPS twin, or if you want to save a few bucks, look at the Mcleod RXT. The RXT is rated at 1000 hp. I personally have the RXT in my car and I daily drive it. I'm not making 900rwhp but I must say it drives great and bites hard when you need it.

Slowhawk

iTrader: (12)

The LS9R is still a organic disk setup. Just pulled one that couldn't take abuse of 600ft/lbs.Had 1200 miles on it.
I just pulled a PT twin out of a freinds totaled car. Made 800-900rwhp and the clutch had 40k miles on it of a ton of abuse at the track.Never slipped.

SPEC-01

iTrader: (2)

You can hit me up via PM or over the phone. I would be happy to assit you either way. My contact info is listed below in my sig.

As slowhawk says, and as I indicated above, the Katech kit based on stock parts. The kit will simply not withstand the same amount of torque as our SST kits much less our higher rated PT, ST or ET kits.

Mike454SS

iTrader: (4)

Barney, I've never heard of the RPS clutch. Where can I read more about it?

Jeremy, I'll probably be giving you a call in a week or 2. Waiting on making sure my cylinder heads are all set first.

SPEC-01

iTrader: (2)

Awesome! I will keep an ear out for your call.

BigRich954RR

iTrader: (1)

Rps is a good clutch just look around for info

SNLPerformance

iTrader: (15)

I can vouch for both Slowhawk and Spec-01, I've got multiple pictures of exploded LS9 clutches that were attempted to be used for a performance unit. They are the next fad like the LS7 was/is.

Katech_Jason

iTrader: (19)

This is the first I've heard of that. 600ft-lbs is well under the 960ft-lbs torque capacity that the clutch has. I would be happy to take a look at it if you want to send it back to see why it was slipping. We have a clutch test fixture to see if really was the clutch or if it was an installation issue. I can tell you the exact torque capacity of your specific clutch.

LPE 403

iTrader: (6)