What CLUTCH to run in a street/strip Car?
#1828738
05/17/15 08:46 PM
05/17/15 08:46 PM
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Joined: Jan 2003
Posts: 7,498 Minnesota
Hemi_Joel
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I need some recommendations for a clutch to put in my street/strip car. This clutch needs to launch and hold good on the drag strip, release clean at 7000 rpm for quick shifts, and be somewhat streetable, and very reliable. My theory is to use good parts, not something iffy, that might work. I don't want to go to all the time and expense, just to drop out of a race because I bought a part that wasn't up to the job. I have been using Mcleod and Advance soft locks in my other race car, but would prefer NOT to use an adjustable clutch in this car so I don't have to adjust it every time I transition from street to strip. Further, I have an adjustable softlock from another project that I test fitted, and the counterweights on the levers won't clear the Quicktime bellhousing. With the Quicktime, it is also limited to a 130 tooth flywheel. I am considering setting up a "hillbilly softlock". http://grannys.tripod.com/clutchtamerdiy.html The car is a 31 Plymouth coupe with a 4 link. It is still under construction, but I estimate it will weigh #3000. The engine is a stroker 469 early Hemi.(1st gen). According to Pipemax, it will make 600-650 horse. (I have no idea how accurate that program is, that could be a Pipedream) The trans is a Tremec T-56 Magnum, with a hydraulic release. The rear gear will probably be 4.20, and the tires 30" quicktime pro bias plys. So what clutch is the hot ticket? Thanks, Joel
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: What CLUTCH to run in a street/strip Car?
[Re: Hemi_Joel]
#1828775
05/17/15 09:33 PM
05/17/15 09:33 PM
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Joined: Dec 2004
Posts: 10,558 Rittman Ohio
fourgearsavoy
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Joel I'm sure I don't have to mention your choices are limited with a 130 tooth wheel but there are guys doing it I'm thinking scalloped 10.5 Mcleod BBL plate with about 2500 base and some weight on the levers. Maybe a dual friction Mcleod 500 or 600 series disc. My new street strip clutch is a Centerforce plate with a 500 series dual friction Mcleod disc. I have yet to test it on the track but it works nice on the street. I'm almost afraid it will bite too hard with slicks on the car and I will eventually strip third gear teeth off the counter gear. Gus
64 Plymouth Savoy 493 Indy EZ's by Nick at Compu-Flow 5-Speed Richmond faceplate Liberty box Dana 60
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Re: What CLUTCH to run in a street/strip Car?
[Re: Hemi_Joel]
#1828933
05/18/15 01:21 AM
05/18/15 01:21 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
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I have a McLeod RXT 10.5" in my Dart behind the 6.1 in a Quicktime bell. 0 miles on it so cant tell you how good it is or isn't, but have heard nothing but good about them.
Mopar to the bone!!!
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Re: What CLUTCH to run in a street/strip Car?
[Re: Hemi_Joel]
#1829382
05/18/15 06:37 PM
05/18/15 06:37 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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McLeod sof-loc of if you can get the new piece from Cale Aronson through ACE I would use that. All that dual disc dual friction crap is just that. CRAP. A sintered iron disc is more than streetable, will last longer, use less base and counterweight and shift better.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: What CLUTCH to run in a street/strip Car?
[Re: madscientist]
#1829507
05/18/15 09:18 PM
05/18/15 09:18 PM
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Joined: Mar 2003
Posts: 9,102 Rogue River, OR
Jeremiah
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McLeod sof-loc of if you can get the new piece from Cale Aronson through ACE I would use that. All that dual disc dual friction crap is just that. CRAP. A sintered iron disc is more than streetable, will last longer, use less base and counterweight and shift better. I have had good luck with a few different styles of single disc, b&b/long style clutch setups. After talking to a few of the clutch manufacturers all of them recommended a multi-disc clutch with steel floaters for a street strip application. This really surprised me. My latest disc is ceramic puck on one side and organic on the other. They said I can get it pretty hot and it would live. If you have room for the hillbilly soft locker give it a shot. Be conservative, too much slip time and it's game over.
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Re: What CLUTCH to run in a street/strip Car?
[Re: Jeremiah]
#1829546
05/18/15 10:07 PM
05/18/15 10:07 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Washington
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McLeod sof-loc of if you can get the new piece from Cale Aronson through ACE I would use that. All that dual disc dual friction crap is just that. CRAP. A sintered iron disc is more than streetable, will last longer, use less base and counterweight and shift better. I have had good luck with a few different styles of single disc, b&b/long style clutch setups. After talking to a few of the clutch manufacturers all of them recommended a multi-disc clutch with steel floaters for a street strip application. This really surprised me. My latest disc is ceramic puck on one side and organic on the other. They said I can get it pretty hot and it would live. If you have room for the hillbilly soft locker give it a shot. Be conservative, too much slip time and it's game over. I would think the manufacturers who said twindisc stuff didn't offer sintered iron. Multiple disc clutches have too much disc weight to shift correct at higher engine speeds. Since the OP said street and strip I figured he would be shifting it. Maybe he is clutchless. The BB/Long style cover is a pain in the ass. You are better off spend the money up front and just doing a 10.5 Long with the correct flywheel. No sense doing it twice.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: What CLUTCH to run in a street/strip Car?
[Re: Hemi_Joel]
#1829606
05/18/15 10:47 PM
05/18/15 10:47 PM
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Joined: Jan 2003
Posts: 7,498 Minnesota
Hemi_Joel
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Thanks for all the great suggestions.
The trans is a T-56 magnum with syncros, so the clutch needs to disengage clean for good shifts.
I looked at some of the dual disc, they are heavy. Lots of people say they are trouble.
Maybe if I do a soft lok with a high coefficient disc and no counterweight, then dial in enuff base pressure to hold on the street + use the hillbilly slipper for the launch at the track?
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: What CLUTCH to run in a street/strip Car?
[Re: Hemi_Joel]
#1829677
05/18/15 11:22 PM
05/18/15 11:22 PM
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Joined: Jan 2003
Posts: 9,892 Weddington, N.C.
Streetwize
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Weddington, N.C.
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Might want to give these guys a call.... www.southbendclutch.com They will make you a clutch that will do exactly what you want it to do They may be able to rebuild your clutch and pressure plate, the DXD clutches are awesome
Last edited by Streetwize; 05/18/15 11:31 PM.
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Re: What CLUTCH to run in a street/strip Car?
[Re: madscientist]
#1829731
05/19/15 12:10 AM
05/19/15 12:10 AM
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Joined: Mar 2003
Posts: 9,102 Rogue River, OR
Jeremiah
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master
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Rogue River, OR
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McLeod sof-loc of if you can get the new piece from Cale Aronson through ACE I would use that. All that dual disc dual friction crap is just that. CRAP. A sintered iron disc is more than streetable, will last longer, use less base and counterweight and shift better. I have had good luck with a few different styles of single disc, b&b/long style clutch setups. After talking to a few of the clutch manufacturers all of them recommended a multi-disc clutch with steel floaters for a street strip application. This really surprised me. My latest disc is ceramic puck on one side and organic on the other. They said I can get it pretty hot and it would live. If you have room for the hillbilly soft locker give it a shot. Be conservative, too much slip time and it's game over. I would think the manufacturers who said twindisc stuff didn't offer sintered iron. Multiple disc clutches have too much disc weight to shift correct at higher engine speeds. Since the OP said street and strip I figured he would be shifting it. Maybe he is clutchless. The BB/Long style cover is a pain in the ass. You are better off spend the money up front and just doing a 10.5 Long with the correct flywheel. No sense doing it twice. To be fair I was asking for a streetable clutch for the Lenco deal when the two disc stuff came up. I agree on the long stuff. I'm back at the b&b for the a-833. Thanks for the lesson!
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