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Exedy Twin vs Textralia for road racing

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Old 07-23-2005, 10:34 PM
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Default Exedy Twin vs Textralia for road racing

I have read up on both of these clutches, and the question I have is how does the Textralia do with a very high revving engine for long periods of time? It seems like it would be quite heavy with the stock GM flywheel vs the much lighter and smaller diameter Exedy Twin.

If the horsepower levels were down around stock, I wouldn't worry as much, but I have 540rwhp and 495rwtq. I won't be drag racing, but I will be driving on the street and around the road racing tracks. In a FRC C5, so it's a light car. I would like to go with the Exedy due to its lightweight because the engine sees 7200-7400 rpm on the track. I think the Textralia would be great for the street and would hold the power, but is it too heavy for the track?

Also, I saw that there is an aluminum and billet steel version of the OCZ700 in the works. Maybe I should wait on that?

Thanks!
Old 07-24-2005, 01:13 AM
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Check out Tilton they have a C5 clutch flywheel and throw out bearing package..Im planning on using it on my WS6 just with a different TB for my type of trans...Soon as uncle sam bucks up with my tax return I might use it to buy a 7.25 twin carbon/carbon clutch bad part is its 2200 bucks but I was assured by an engineer at Tilton it would work well in everything from street use to full tilt racing not to mention the clutch and flywheel prob weighs in at 30 pounds if that
Old 07-24-2005, 06:54 AM
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Originally Posted by JakeFusion
I have read up on both of these clutches, and the question I have is how does the Textralia do with a very high revving engine for long periods of time? It seems like it would be quite heavy with the stock GM flywheel vs the much lighter and smaller diameter Exedy Twin.

If the horsepower levels were down around stock, I wouldn't worry as much, but I have 540rwhp and 495rwtq. I won't be drag racing, but I will be driving on the street and around the road racing tracks. In a FRC C5, so it's a light car. I would like to go with the Exedy due to its lightweight because the engine sees 7200-7400 rpm on the track. I think the Textralia would be great for the street and would hold the power, but is it too heavy for the track?

Also, I saw that there is an aluminum and billet steel version of the OCZ700 in the works. Maybe I should wait on that?

Thanks!
Out of curiosity what type of setup do you have spinning to 7200 to 7400rpm?
Old 07-24-2005, 11:16 AM
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Give Quarter Master a call.
http://www.quartermasterusa.com
They are working on a single disk 8.5" clutch that will handle the power and be half the weight of a stock clutch.

Andrew
Old 07-24-2005, 01:19 PM
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I know a guy who is switching from Exedy twin to a Textralia. Not sure why though. My Tex has a really light pedal which I think would be nice for road racing. My pedal is lighter than stock, very nice to drive.
Old 07-24-2005, 09:27 PM
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Vince: Darton 4.155" bore with 3.71" offset ground crank. Jesel SS Rockers and Morel Hyd lifters.
Old 07-25-2005, 09:36 PM
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Originally Posted by JakeFusion
Vince: Darton 4.155" bore with 3.71" offset ground crank. Jesel SS Rockers and Morel Hyd lifters.
Now that is a nice motor..
Old 07-25-2005, 11:58 PM
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Thanks, Vince. It comes out to 402, but is more eager to spin than the 4" strokers... The cam helps, too. It's a custom spec'd Comp Renegade 266/270 .621" 106+1 hyd cam. Likes compression, and lot's of it. Running 12.7:1 without issue on pump gas. Once I find some sort of clutch, maybe I can work out the Speed Density tune.

Softer type lobes than the XE-R variety, so the springs should last a little while. Hopefully long enough to do some lapping at 6000+rpm.

Last edited by JakeFusion; 07-26-2005 at 12:18 AM.
Old 07-26-2005, 12:29 AM
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Originally Posted by CTSmechanic
not to mention the clutch and flywheel prob weighs in at 30 pounds if that
I think it's probably much lighter than that. The Supra Triple Disk Tilton is 9lbs total. But it's also $4500, so maybe you're paying for the uber lightweightness?
Old 07-26-2005, 03:16 AM
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I use a spec stage IV with AL flywheel. One of the things that sold me on it was the idea of less moving parts with the clutch disc being un-sprung. Ive heard of too many failures with the sprung disc in open track. When this clutch goes I plan on going with the Mcleoud oval track clutch. < 10lbs for the whole assembly, and it works with all else being stock, with a choice of friction materials. I think its around 1200 bux.
Old 07-26-2005, 10:35 AM
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Originally Posted by JakeFusion
Thanks, Vince. It comes out to 402, but is more eager to spin than the 4" strokers... The cam helps, too. It's a custom spec'd Comp Renegade 266/270 .621" 106+1 hyd cam. Likes compression, and lot's of it. Running 12.7:1 without issue on pump gas. Once I find some sort of clutch, maybe I can work out the Speed Density tune.

Softer type lobes than the XE-R variety, so the springs should last a little while. Hopefully long enough to do some lapping at 6000+rpm.
I did not know there was a cam that big for us Hydraulic peeps.. I need to investigate...
Old 07-26-2005, 02:48 PM
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Originally Posted by JakeFusion
I think it's probably much lighter than that. The Supra Triple Disk Tilton is 9lbs total. But it's also $4500, so maybe you're paying for the uber lightweightness?
Its safe to say your paying for the best clutches avalible.. the 4500 might be for the carbon/carbon version my those are pretty steeply priced but drive well and handle quadruple digit torque...
Old 07-26-2005, 06:54 PM
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My Exedy single seems to doing great so far. All street abuse at this time. Road Atlanta is in December and Beach Bend is September for some straight line abuse.
Old 07-27-2005, 04:20 PM
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Alright guys, I think I've decided on the SPEC Stage 5 with Aluminum Flywheel. Should be streetable, hold the power, and be lightweight. How does that sound?
Old 07-27-2005, 11:21 PM
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Ive seen a 5 in person.....it squeals and makes all kinds of noise like the words comming to and end. But it does hold. My stage 4/al flywheel squeals a little when its cold, but by the time i get to the end of my street its quiet.
Old 07-28-2005, 01:53 PM
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Isn't the Stage 4 iron as well? Hmm, might look at it too.
Old 07-28-2005, 03:05 PM
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I think the 4 is basicly an unsprung 3



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