JUIC3D

I can't use my current tires. They're worn down to the threads and the sidewalls cracked somehow.

I was going to get another set of Mickeys but perhaps it's time for slicks? You think those would be easier on the drivetrain than drag radials? I'd also need bias ply skinnies for up front too.

robz

I was on board with you Joe when we were discussing stock clutches. The 3.90 gear would also be a great addition to a stock clutch as it takes some strain off it.

robz

Then why go through the trouble, you were already there?
We all want to see the et potential from n/a c6's.

JUIC3D

Because my stock clutch wasn't consistent anymore. Some days it would hold fine, other days it would slip as soon as I launched. The only reason I was able to cut the 1.5s and 1.4 at PBIR was because the track prep was so good, I didn't need any type of burnout to have the tires stick. What you can't see on the video or the timeslip is my left foot holding the clutch pedal up between the 2-3 and 3-4 shift. There were a few track days where the weather was good and I got everything ready, tires, seat out, etc, and the clutch gave up the very first pass. That sucks and I got sick of it.

It got bad enough that even a mild 3rd-4th gear pull on the highway would result in the pedal falling to the floor.

I did the ranger method religiously but it didn't help.

I had been wanting to build the rear end anyway so while the drivetrain was apart, I figured it would be a good time to get that swapped out.

I mean, I say I'd be happy with a 1.5 or whatever, but knowing me, I'll probably push it and go for a 1.3 on occasion, especially if I end up with slicks.

robz

Let's see how it goes. I would have liked to see you with a new clutch and 3.90/4.10 gear like Joe G was hoping but if the new setup kicks **** then it's all worth it.

JUIC3D

What do you mean rob? A new stock clutch and 3.90s/4.10s?

I have a new twin disk and 3.90 gears now. I swapped out both pieces at the same time.

Joe_G

I'd use those (call me crazy) and see how you do. I have a feeling you will need to go to bias ply - but you don't want to if you don't have to as they are a lot taller and will essentially offset the gearing you just put in the car.

I used mine like that all last season and they were fine. YRMV.

p.s. don't lose heart buddy. If you have to go bias ply, you can launch off the rev limiter! They are easier on the parts.

Robz and Gary20004Z06 will have salient advice if this clutch doesn't work like the stock one. I believe they both have had hard hooking clutches.

p.p.s. If your pedal was falling to the floor at launch you had to replace it. That's what happens to z06 stock clutches when you overpower them. Nothing you can do about that but replace it. I thought it was just after the 3-4 shift. At launch it's over.

JUIC3D

They don't make a 26" tall slick? You're nuts Joe--those cracks make me super nervous. If that side wall separates at 130mph. . .

Joe_G

I think Hoosier might make a short slick now that you mention it. The M/T bias ply is taller than 26 even though it says 26/17 on it. Check out Andrew (DSP300C)'s video, he's running the tall ones. Actually if you look at my avatar I had them too at that time.

Not nuts. Lookie here. They worked for me like that.

JUIC3D

Oh no Joe--I have lots of videos of the clutch letting go on the launch. It got to be super frustrating and also embarrassing. I'd have to make the first turn off and barely make it back to the pits under my own power.

Then all my buddies would come tell me how the whole track smelled like my clutch

TMyers

I don't drag race and my car is totally stock but I replaced my stock clutch with the LS9x last year. I do autocross though and have the exact problem you describe. It is very hard to launch correctly even with stock rubber.

VGLNTE1

I have had a Textrailia in mine for drag racing, and road course. It at 20000 miles+ now. Still holds perfect. I make 500/500 give or take a few;-)

CDaniel525

Well for comparison, once I get my ca back I will post results of a McLeod RXT once its broken in... I sure hope I dont end up with an on/off clutch like you guys are describing for drag racing, and still end up with some slip for a decent 60foot.
Keep us updated once you get your broken in Justin!

548chevelle

Justinjor
Originally you said your comparison came down to 3 clutches. Did you look at RPS and Pfadt? And if you did why did you eliminate them? Also what does the Mantic weigh?
Thanks
Gary
'11 Z06

JUIC3D

I wasn't aware Pfadt made clutches too.

I'm not a big RPS fan personally. I don't have any anecdotal evidence as to why not, but I've read countless stories of poor customer service with them on this forum and very few positive reviews. A local buddy also has the RPS twin carbon and always complains about it and the lack of slipping ability. I've felt it myself and I didn't like it.

Doug and Chris@ECS have been outstanding with regards to customer service both presale and postsale. I'm waiting to get everything broken in and situated but when I do, I'll do a through review. I'll need some time at the drag strip as well.

Chris also gave me his cell number and asked that I text him if any issues came up. I was really worried about the neutral rattle after I fired it up the first time on Sunday. He responded very quickly and answered my questions and also followed up a few days later to make sure everything was still in good shape.

It's rare to find that kind of service after the sale. I've only had 2 other vendors with great customer service. Gene@GM Partshouse and Cajun/Brett@BER. All 3 are top notch in my opinion.

GARY2004Z06

Justin,
I'm not going to put another horse in the race. That one left the barn awhile ago. I just wish to add a few facts.
1.351
1.364
1.366
1.372
1.382
1.386
1.389
1.392
1.398
Yes, the BC2 can be slipped.
Rob Smith has always answered my questions and has been extremely helpful.
We appreciate your honest assessment thus far and look forward to your on track results.

JUIC3D

Are 1.3 60fts indicative of a clutch that slips? Or are you using those as an example of it not slipping? I'm not sure I understand completely.

GARY2004Z06

At this power level, the clutch must slip to cut 1.3s in our Vettes.

JUIC3D

What power level is that? heads/cam Z? ~580whp?

dennis50nj

Garys z06 is bolt/ons only