1000+ HP clutch selection

[erecker]

Hi,
I was browsing the parts catalog, and could not find what I'm looking for.
I just purchased a gt42r ~950hp turbo as part of a build-up. I am looking for a clutch to match this power level.
The car will be trailered to and from the strip, it is exclusively a drag car, so a stiff pedal is expected.
I was looking at an act xact flywheel to match, if one is better at this power level please recommend also.

Thank you for your input in advance,
sincerely,
~Eric Frazer

[snowborder714]

I would suggest taking a look at this thread - 500-600hp clutch suggestions??

There's a guy on there running nearly 900awhp on the Devo Tuning Twin-Disc clutch and flywheel. That seems to be the most popular clutch in that thread and for high hp applications that I've seen.

[2gAWDTalon]

Most of the twin disc clutchs will hold up to whatyou want. BTW clutches are rated by TQ, not HP.

[thekellbeast]

Topstreet about the Devo Tuning twin disc: "I am making 600lbs/trq and nearly 900whp with no complaints. This is an industry improvement the DSM community has been waiting for!"

There you go

[stephenz]

powertrain,rps try these also.

[esoung]

Clutch Master stage 6 or stage 7 twin disc clutch or Extremepsi Custom ACT can take 700+ ft-lbs of torque on a race disc.

[NewTurboTuner]

PTT twin disk. They come with a lightened flywheel, Holds upwards to 900 ft pounds, and is Surprisingly streetable. Rebuilds are reasonable too. The entire set-up weighs less than the stock flywheel by itself. As a whole my ACT2600 & Stock Flywheel were 31lbs, and the entire PTT set-up is 16
It made my car rev much faster too which is a nice plus

[1gDSM4g63]

Originally Posted by NewTurboTuner

As a whole my ACT2600 & Stock Flywheel were 31lbs, and the entire PTT set-up is 16
It made my car rev much faster too which is a nice plus.

You don't want to go that light if you're going for that much power. Especially not the flywheel, it will crack or shattered if you put that much power in it.

[turbosax2]

Originally Posted by 1gDSM4g63

You don't want to go that light if you're going for that much power. Especially not the flywheel, it will crack or shattered if you put that much power in it.

Proof?

[erecker]

Thanks everyone for the great advice, it looks like a twin disc is the way to go, I will be shopping for it soon and let you know how it works out!!

[lenny 15]

Originally Posted by esoung

Clutch Master stage 6 or stage 7 twin disc clutch or Extremepsi Custom ACT can take 700+ ft-lbs of torque on a race disc.

and to add to this, i talked with Road Race Engineering when i bought their "No Name" Flywheel, and found out that it is the same flywheel as the ACT flywheels. they went to the company that produces ACT's flywheel and bought them direct.

[1gDSM4g63]

Originally Posted by turbosax2

Proof?

It is common sense which most people know about. Like the 8 lb. Fidanza aluminum flywheels, they are too fragile. You got to go with something like ACT chrom-poly steel 10 lb.

Plus going to light it not ideal for drag racing 900whp. The whole point of drag racing is putting down torque not revving super fast. They is a ratio factor torque:rev speed of the weight of flywheels. They don't make 8 lb. for SUVs, they more like 30-40 lbs.

[NewTurboTuner]

Originally Posted by 1gDSM4g63

You don't want to go that light if you're going for that much power. Especially not the flywheel, it will crack or shattered if you put that much power in it.

I've never heard thAt before

....just because something is light, doesn't mean it is weak

[turbosax2]

Originally Posted by 1gDSM4g63

It is common sense which most people know about. Like the 8 lb. Fidanza aluminum flywheels, they are too fragile. You got to go with something like ACT chrom-poly steel 10 lb.

Plus going to light it not ideal for drag racing 900whp. The whole point of drag racing is putting down torque not revving super fast. They is a ratio factor torque:rev speed of the weight of flywheels. They don't make 8 lb. for SUVs, they more like 30-40 lbs.

This is not common sense to me. Then again, a lot of things don't make sense to me.

I asked for proof why a lightweight flywheel is not a good thing to use. You just restated your point again. Please show me examples of people who have had problems on a DSM because their flywheel was too light in a racing situation. And how did suv's get involved?

[NewTurboTuner]

Originally Posted by 1gDSM4g63

It is common sense which most people know about. Like the 8 lb. Fidanza aluminum flywheels, they are too fragile. You got to go with something like ACT chrom-poly steel 10 lb.

Plus going to light it not ideal for drag racing 900whp. The whole point of drag racing is putting down torque not revving super fast. They is a ratio factor torque:rev speed of the weight of flywheels. They don't make 8 lb. for SUVs, they more like 30-40 lbs.

A 8lb Fidanza aluminum flywheel .......is not a PTT flywheel.
And adding 2 more lbs going to a 10lb flywheels is not necisarliy going to make the difference in strength.

I'll say it again ........just because something is light, doesn't mean it is weak

Putting down torque is not the whole point of drag racing. The point is more like ....accelerating as fast as you can, and going as fast as you can. Last time I checked a lightened flywheel helps with that.

Theres a reason why DSM's launch at 6000+ RPM. We don't have alot of torque down low anyway ...so we have to keep RPMs high to combat our lack of torque. Also when you spin something very very fast ...weight is an enemy. If you dont believe me look at Magnus race motors. Light wieight pistons, lightweight rods, lightweight crank ....all this stuff is as light as possible. If heavy stuff was better, then everybody would be trying to add extra weight to pistons, rods, cranks

[1gDSM4g63]

Originally Posted by NewTurboTuner

And adding 2 more lbs going to a 10lb flywheels is not necisarliy going to make the difference in strength.

Also when you spin something very very fast ...weight is an enemy. If you dont believe me look at Magnus race motors. Light wieight pistons, lightweight rods, lightweight crank ....all this stuff is as light as possible. If heavy stuff was better, then everybody would be trying to add extra weight to pistons, rods, cranks

I'm say that heavier has more strength, I'm talking about the type of material. Steel is stronger than aluminum, which is heavier.

And if you lighter is better, I'm pretty sure there is lighter and stronger material than aluminum and I'm peculiar as to why companies don't make light flywheels.

It's just common physics knowledge. The light it get the less inertia it has and won't give enough torque to the wheels from a stop.

Besides Fidanza other manufacturers, Unothrodox, ACT, Exedy, Centerforce, Clutch Master, stay within the 10-12 lb. range for flywheels whether it is steel or aluminum. You do the the research and explain to the manufacturers why lighter is better proving them wrong.

[NewTurboTuner]

Originally Posted by 1gDSM4g63

I'm say that heavier more strength, I'm talking about the type of material. Steel is stronger than aluminum.

what makes you think that heavy atomatically makes something stronger?

Originally Posted by 1gDSM4g63

And if you lighter is better, I'm pretty sure the a both lighter and stronger material than aluminum and I'm peculiar as to why company don't make light flywheels.

Huh??? What???
.....Companies DO make light flywheels

Originally Posted by 1gDSM4g63

It's just common physics knowledge. It weren't to get any lighter then it doesn't have enough inertia and won't give enough torque to the wheels from a stop.

Again I'm not exactly sure what you're trying to say, but I think you are talking about inertia, not torque? A heavier flywheel will keep the motor rotating longer, but it does not make a motor have more torque. It actually take away available torque to the wheels.

I think I'll get out of this back and forth thing with you cause it looks like I'm going to be wasting my time. I'm done. You Win ....heavier is better, lightweight sucks and is no good

[1gDSM4g63]

Originally Posted by NewTurboTuner

Huh??? What???
.....Companies DO make light flywheels

I was talking about lighter than the Fidanza 8 lbs flywheel. I'm pretty sure Fidanza makes the lightest flywheel for DSM and I'm pretty sure it is possible to go even light with just as much strength as aluminum with a different material.

And lets take for example there was some material as light as sheet metal and as strong as steel would you use it? I mean, I cannot explain it any further that going lighter is not better. If lighter is better I'm not stopping you from creating a lighter flywheel and manufacture them. You could make big bucks off that.

[turbosax2]

Originally Posted by 1gDSM4g63

I was talking about lighter than the Fidanza 8 lbs flywheel. I'm pretty sure Fidanza makes the lightest flywheel for DSM and I'm pretty sure it is possible to go even light with just as much strength as aluminum with a different material.

And lets take for example there was some material as light as sheet metal and as strong as steel would you use it? I mean, I cannot explain it any further that going lighter is not better. If lighter is better I'm not stopping you from creating a lighter flywheel and manufacture them. You could make big bucks off that.

Again, do you have examples of people having issues with lightweight flywheels in racing situations? Or do you personally have experience with them?

[Street_Killer]

Originally Posted by 1gDSM4g63

I was talking about lighter than the Fidanza 8 lbs flywheel. I'm pretty sure Fidanza makes the lightest flywheel for DSM and I'm pretty sure it is possible to go even light with just as much strength as aluminum with a different material.

And lets take for example there was some material as light as sheet metal and as strong as steel would you use it? I mean, I cannot explain it any further that going lighter is not better. If lighter is better I'm not stopping you from creating a lighter flywheel and manufacture them. You could make big bucks off that.

Well, lighter isnt always better though. If you put a 4lb flywheel on our cars, then there would be some serious drivability problems. Fidanza has a video explaining it, and how they think the 8lb is the lightestyou should go on our cars.

[2gAWDTalon]

For those of you arguing about light flywheels, I can help but notice that the argument started over the PTT setup's total weight. There are several people putting down 700+ awhp on the PTT's with no problem.

[timloomis]

Airplanes are made of aluminum. Its as strong as steel and a lot lighter.

[inneedof]

a tilton should hold at this power level also

and the ptt setup has proven strength, and does feel great on the street. Just because you think a light flywheel is weak doesn't mean anything, the only thing that does mean anything is proof, witch you have none of. Not trying to be rude but it appears that your are talking a little bit out of your level of knowledge.

[1gDSM4g63]

Originally Posted by timloomis

Airplanes are made of aluminum. Its as strong as steel and a lot lighter.

No there are not. Aluminum is weaker than steel, especially to chrom-poly steel.

[1gDSM4g63]

Originally Posted by Street_Killer

Well, lighter isnt always better though. If you put a 4lb flywheel on our cars, then there would be some serious drivability problems. Fidanza has a video explaining it, and how they think the 8lb is the lightestyou should go on our cars.

Finally someone agrees with me. For further prove check the ACT ProLite and StreetLite flywheels. One is autocross/street racing and the other one's from drag racing. It needs the proper inertia. Being to light will over rev before you get going.

[1gDSM4g63]

Originally Posted by inneedof

a tilton should hold at this power level also

and the ptt setup has proven strength, and does feel great on the street. Just because you think a light flywheel is weak doesn't mean anything, the only thing that does mean anything is proof, witch you have none of. Not trying to be rude but it appears that your are talking a little bit out of your level of knowledge.

Okay, I don't really care. It just my posting on a forum. All I'm telling you is that light flywheels is not the best choice of 950lbs of torque. If you watch the Fidanza, listen to ACT, read RRE opinion, or even both to do a little research you believe what you believe. People with high torque drag racers don't even consider going as light as Fidanza 8 lbs.

[kraka]

Devo Tuning is one of my local shops, so of course I will recommend the Quartermaster/Devo twin disc...

Just in case that isn't baller enough, there are a number of companies that make triple carbon plate clutches...I know my buddy ran a Triple Carbon Devo Tuning clutch on his 42r EvoIX, it sure as hell held the power and easily handled the 8,000 RPM launches....

I say its 'baller' because it comes with a price tag of somewhere in the $4500 range

[inneedof]

Originally Posted by 1gDSM4g63

Okay, I don't really care. It just my posting on a forum. All I'm telling you is that light flywheels is not the best choice of 950lbs of torque. If you watch the Fidanza, listen to ACT, read RRE opinion, or even both to do a little research you believe what you believe. People with high torque drag racers don't even consider going as light as Fidanza 8 lbs.

but the ptt setup, witch you were arguing against is built for a lot-o-power, new turbo tuner, was not referencing the fidanza or the act flywheels

[thekellbeast]

Originally Posted by 1gDSM4g63

I was talking about lighter than the Fidanza 8 lbs flywheel. I'm pretty sure Fidanza makes the lightest flywheel for DSM and I'm pretty sure it is possible to go even light with just as much strength as aluminum with a different material.

The weight of the flywheel isn't the only thing that affects how it drives. If you've ever watched the Fidanza tech interview on Streetfire, you would have seen their guy explain how two different flywheels, both weighing the same, can behave completely differently just based on how the weight is distributed. So an 8lb flywheel with the weight distributed towards the outside could behave more like a stock flywheel than a 12lb flywheel with its weight concentrated around the center.

Besides, the Fidanza flywheel is SFI certified, stock and some others aren't.

Is there some sort of driveability problem with Fidanza flywheels? I've never heard anyone complain. I might take a day or so to adjust your driving habits, but it's not the end of the world.

[SpeedAddict62]

Ok, I think you have the right idea, kind of. But the wrong reasoning.

Choosing a flywheel of the correct weight is based on the application, not just by how much power you are making. People generally don't go with super light flywheels in drag racing (or rock crawling) applications because they don't want to reduce the inertia (or maybe they want to increase it. This is covered in the Fidanza video you refered to, which can be seen here: Fidanza vid. I think this has more to do with not bogging the launch than "over-revving" (how could you do that anyway??).

You can't go too light, say, on a street car, because of the drivability issues, as stated above. Stalling when you push in the clutch, for example. The engine would decelerate so fast the ecu couldn't react fast enough. Obviously Fidanza thinks its found "as light as you can go."

Obviously, less rotating weight is going to help acceleration. Its going to take less force to spin a light flywheel compared to a heavier one. And its going to put less load on other components (crank, bearings).

Do you see these high horsepower applications using twin disk setups having any problems? Not one. And all the reviews I've read say they outperform the single disk setups.

I see no evidence to support the belief that lots of torque means you have to run a heavy flywheel.