Street friendly twin disc?

[stroh]

I was wondering if anyone has some advice on a street friendly twin disc. I was looking at either a quarter master or competition clutch. Something that doesn't engage really harshly, or maybe they all do. I don't have any experience with a twin disc. I need something that can hold 500lb of torque. Thanks.

 

[LandSpeed-DSM]

The twins are all pretty harsh.

 

[TSiAWD666]

The evo guys throw in the 2g accumulators to make them nicer. How much exactly I couldn't say as I have a twin-disc but threw away the accumulator many years ago. Might want to look into that.

 

[TSIfreek]

Ether the ACT twin or a TMZ quarter master gear drive with the street disks and heaver flywheel..

 

[pneumo]

Since you have a 1G, I'd recommend a 2G clutch slave cylinder. It's a little bigger so it reduces pedal pressure and broadens the engagement point slightly. It's not a cure-all, the clutch is still stiff and difficult to modulate compared to a good single disc.

 

[KazooGS-T]

There is an aftermarket rod, it's a little longer to allow better engagement points

 

[TSiAWD666]

In response to changing the slave rod, how is that going to help the engagement? While it changes the region in the clutch pedal throw of where engagement occurs it's not going to make it any smoother or less on/off, right? I'm asking an honest question here in the chance there's a good reason behind your post.

 

[Diamond Star Werks]

It doesn't change how it engages simply where it engages.
The act twin is a good dd clutch from some reviews I've heard.

 

[1qkfwd]

I ran a 2G slave and the 2G accumulator in my 1G with a QM twin. If you aren't used to driving a twin then the car would shudder when taking off. But once you learn to drive the clutch then it really wasn't that bad.

If you have any way around using a twin I would avoid going that route. Goin twin is when nothing else will hold the power any longer. Twins are very hard on the trans parts especially 3rd and 4th that ride on the input shaft.

 

[Awd-laser]

Why not go with an ACT 2600? I have a 2600 with an unsprung 6 puck and according to ACT's website it will hold 530 tq and mine is super easy to drive.

 

[RvlutionMtrsprt]

The tq rating is at the flywheel, which I'm sure you know. For those wanting to put down 500+ to the wheels, even the 2900/6 puck won't hold. I couldn't get mine to hold over 494ft/lbs through a 5 speed awd trans. I'm unwilling to run a pressure plate heavy enough to provide the clamping force necessary to hold more torque so I went the the gear drive QM twin.

 

[stroh]

I currently have a stage 4 competition clutch with a 6 puck sprung disc. I believe the torque rating is like 450. I think the pressure plate is 2700. It engages prett harshly right now. Once I switch to E85 it won't be enough. I'm thinking I might go with the quarter master. Thanks for the suggestions.

 

[mondale]

I ran a QM twin disk gear drive from TMZ when I was a 5 speed. That clutch was easier than my sprung 6 puck to drive around on the street. With the amount of surface area on the disks, you don't have to have an incredibly high pedal pressure for an effective clamp on the disks. I could drive it in stop and go traffic without getting tired and without revving it up like an idiot with a puck clutch. I don't think you have to do any switching out of slaves or rods or whatever. That clutch made my car more enjoyable than it ever was with a 6 puck.

 

[Tiki2777]

I ran a QM twin disk gear drive from TMZ when I was a 5 speed. That clutch was easier than my sprung 6 puck to drive around on the street. With the amount of surface area on the disks, you don't have to have an incredibly high pedal pressure for an effective clamp on the disks. I could drive it in stop and go traffic without getting tired and without revving it up like an idiot with a puck clutch. I don't think you have to do any switching out of slaves or rods or whatever. That clutch made my car more enjoyable than it ever was with a 6 puck.

Lol +1 for this. I know exactly what you mean by "revving it up like an idiot," damn 6 puck clutches. Great for holding the power, but seriously annoying in traffic.

 

[stroh]

I ran a QM twin disk gear drive from TMZ when I was a 5 speed. That clutch was easier than my sprung 6 puck to drive around on the street. With the amount of surface area on the disks, you don't have to have an incredibly high pedal pressure for an effective clamp on the disks. I could drive it in stop and go traffic without getting tired and without revving it up like an idiot with a puck clutch. I don't think you have to do any switching out of slaves or rods or whatever. That clutch made my car more enjoyable than it ever was with a 6 puck.

I think you have sold me on it. Thanks

 

[pneumo]

skip the extended rod and get a new clutch fork and pivot ball.

 

[Skewer]

skip the extended rod and get a new clutch fork and pivot ball.

+1 The extension rod is just a Band-Aid. Do it once --- do it right.

Tim

 

[bastarddsm]

My qm is fine on the streets it just absolutly sucked at the track to launch, and the shifts really are not much better than my well set up 2600 setup.

Maybe on slicks it would be ok, but it seemed like I couldn't slip it enough to get the car rolling. It just wanted to grab and blow the tires off. Then it would wheel hop because it doesn't have enough mass to keep it going.

 

[KazooGS-T]

skip the extended rod and get a new clutch fork and pivot ball.

Yeah, I bought a competition clutch fork/pivot ball setup... I also saw the extended rod. I'll report back how I like the QM when I get it installed. Bonus to the comp fork, you don't have to grind anything down. I got it for pretty cheap at thmotorsports. Looks nice, drop ships straight from comp. Plus you're eligible for their reimbursement/sponsorship program (following certain simple stipulations). Your clutch could pay for itself, I'm going to give it a shot and see how it goes. Pretty good payouts, for simple events/car shows, if you place 1st/2nd.

I was curious about the extended rod and I guess if you don't like your engagement points, that's always a good option.

 

[jakelandry]

I loathe my standard qm twin disk on the street, but its an amazing track clutch. I recommend the gear drive version of the qm as the old ones are incredibly loud (to the point of public embarrassment) and squeal when engaging.

 

[pneumo]

My qm is fine on the streets it just absolutly sucked on the street.

um, so how is it on the street again?

 

[twicks69]

I would go one of two routes, SBC SSX pressure plate with full ceramic disk (b-series), or my street friction, street flywheel, media blasted QM gear drive twin. You shouldn't need to mix and match clutch hydraulics but who knows, the accumulator might be useful. On my 2g, I run all 2g master and slave with braided stainless line and no accumulator. Also, get competition clutch forged fork, OEM TOB and clip, and proper length flywheel bolts. I have it outlined on my website.

 

[stroh]

I would go one of two routes, SBC SSX pressure plate with full ceramic disk (b-series), or my street friction, street flywheel, media blasted QM gear drive twin. You shouldn't need to mix and match clutch hydraulics but who knows, the accumulator might be useful. On my 2g, I run all 2g master and slave with braided stainless line and no accumulator. Also, get competition clutch forged fork, OEM TOB and clip, and proper length flywheel bolts. I have it outlined on my website.

Okay I appreciate the info. I will check out your website. Thanks

 

[GRNDSM]

+1 The extension rod is just a Band-Aid. Do it once --- do it right.

I think that you are giving it too much credit: it is used Band-Aid, which lost all of its "stickiness"

I am very impressed with ACT Twin disc! I really does fell like a grabby stock clutch!!! The only problem is the price...

 

[keltalon]

My qm is fine on the streets it just absolutly sucked at the track to launch, and the shifts really are not much better than my well set up 2600 setup.

Maybe on slicks it would be ok, but it seemed like I couldn't slip it enough to get the car rolling. It just wanted to grab and blow the tires off. Then it would wheel hop because it doesn't have enough mass to keep it going.

Do you have the race disc or street disc?