JUIC3D

Can you go into more detail on which Mantic you guys sell? Looking at the Mantic website, they list 2 different 9000 variety clutches and the race version has yet again 4 different disc types (from what I can tell).

Also, can you PM details on your money back guarantee and the 'offer you can't refuse'? I'm very interested and will be pulling the trigger on the clutch decision in the next couple weeks.

I spoke with someone last week at ECS(Chris I think?) and got a little information but would like to do some more research.

Thank you sir

ls3gotcha

I am in the same boat as justin. I have been following his clutch threads because he thinks very similar as me. Pm me a price for the mantic twin kit for my 09 ls3.

Joe_G

I'm listening very closely as well.

With 472 passes on my OE clutch, I guess I'll need one someday?

I really think the stock clutch's ability to slip and take the hit is a key to keeping the drivetrain together. I think these on off clutches are very hard on the equipment.

JUIC3D

I'm anxious to hear back from Doug@ECS with regards to that exact aspect of it.

The money back guarantee is nice and I really appreciate the offer, but I would still have to remove the drivetrain again and send the clutch back and pick something else out if for some reason I didn't like it.

I still have about 2 weeks before pulling the trigger so there's still time for research and anecdotal evidence to surface.

FRNTHVY

Any update on your situation? I am in the market for a new clutch as well and am having the same debate you are having!

Sam

JUIC3D

I ended up with the Mantic 9000 series twin disk. I'm still breaking it in but so far so good. It's a little noisy in neutral with the pedal out (at a stop light for example) but its a twin disk so that is to be expected. I had to up the idle from 750 to 900 as the rattle at 750 was way too much for my tastes. It was so alarming that I actually pulled everything back apart just to make sure something wasn't loose as the sound was atrocious.

So far I've put about 250 miles on it and I like it. It shifts gears very smoothly, and has very little chatter at take off but it does require a driving adjustment from the stock clutch.

TNTC4VETTE

Justin, I have heard from a couple guys that what you're hearing at idle with the pedal out has nothing to do with the clutch assembly, but the actual trans itself, since the lighter flywheel's rotating mass acts as less of a damper, so things bonk around a bit more back there. Solution, push in pedal...LOL

No firsthand experience, but this came from a GM tech and a builder I now here locally.

JUIC3D

I wouldn't doubt it at all. The clutch works perfectly and I really like the pedal feel and overall performance. It's just retarded noisy in neutral
As soon as I push in the clutch pedal about an inch and a half, the noise immediately stops.

TNTC4VETTE

I did another full DOT4 flush and yanked my return spring.

Much better, but I need to place an order soon

JUIC3D

Ya, I'm in love with this remote bleeder. It takes me literally 3 minutes to fully bleed the clutch from start to finish.

Joe_G

My c5 which I bought new came with a video, and in the video, it describes that neutral trans rattle...they actually have a car do it in the video. It wasn't that loud, and frankly, I've never noticed it in either my c5 or my c6 (of course I always have a cam or aftermarket exhaust).

The loudest thing in my car, with the cutouts closed, is the doggone FAST! That thing is noisy. Heck it might be hitting my firewall, Iv'e got the cut FAST mod on mine.

JUIC3D

I'm thinking the lope of the cam, combined with the lightweight flywheel, and the twin disk clutch is a recipe for excessive neutral chatter.

It's tolerable now but when I first got it together, it was disturbingly loud. Loud enough that it prompted me to pull the entire drivetrain back out of the car to double check everything.

After upping the idle to 900, its much quieter but the rattle is still present. It's not a game changer, but it is something people should be aware of.

TNTC4VETTE

Huh? I can't hear you. In the car. (You are dead on about the FAST)

I am anxiously awaiting some shakedown runs from you.

JUIC3D

You and I both. Another 700 miles or so and I'll really lay into it. Right now, I'm just doing regular driving with the occasional 70% throttle blast, just to make sure everything is functioning correctly.

The car feels MUCH faster though, that is for sure--it also revs up much more quickly now and I find myself at 3800rpms without even trying. I'm really anxious to romp on it and do a 1st-2nd-3rd gear pull and see how it feels.

You know how your car feels when it makes a lot of power and you're not expecting it? That's what this feels like. I was very used to the 500whp from before and could drive on the edge of traction often and feel comfortable. With the new clutch and 3.90s, the car surprises me a LOT now. . .

Joe_G

Feels like it lost 500 lbs doesn't it.

Where did you hear that before.

BTW wait until you figure out it catches traction easier after breaking traction now.

JUIC3D

Joe, yes that does sound familiar. I expected a nice bump in performance for sure and given that its super hot right now, I'm really excited to see how it feels when the cooler weather shows up again.

And what do you mean by your last statement? You're saying it won't break the tires loose as easily now with the gears? It'll hook up better?

Joe_G

Yep.

Nobody ever believes that but wait and see. It'll break loose, just like it did before, but it'll catch and go faster.

TNTC4VETTE

Experienced that today in 3rd passing someone driving slowly on my favorite stretch of road. Little drift and I was out of the throttle! The NT05s are no longer the great, grippy tires I believed them to be.

C6-13thPilotCar

I have had the LS9X from Katech last year and now have the Mantic from ECS. Problems with LS9 clutch from Kaltech with 2,000 miles on it. One of the discs lost a clip in the center and caused an out of balance condition. Kateck did not stand behind it. said it was older than GM warranty on parts and did nothing to correct it. Last Katech part I will buy. ECS were stand up people on this and replaced it with a Mantic twin disc and only charged me for the additional Mantic parts. The Mantic is stronger and as smooth as the LS9 clutch. After break in it drives perfect with perfect shifting at all RPM,s I am putting 721 rwhp abd 655 tq thru it and it does not slip. Mantic is the way to go.

JUIC3D

Did you notice any issues with take-offs from a stop light with the Mantic? I've had mine for about 250 miles and it has some pretty significant chatter when slipping it from a stand still.

I'm happy with it so far but I'm wondering if this will improve.