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2012 Boss 302 Clutch Replacement Recommendations

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Those of you with the Exedy Hyper single can you update your impressions? It sounds like high rpm lockout is cured with it, and I am also curious about whether or not it chatters upon takeoff.

My RST/steel flywheel combo chatters and has never gotten any better after break-in. I love the fact that I can finally snap off 7900rpm shifts all day long, but the judder judder is going to drive me nuts eventually.
 
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I think the pedal effort is about the same as stock, that's one thing about hydraulic clutches, We run the Hyper single in the race car for a full year without issue in PWC. Just make sure, for the street, that you get the disc with the springs in the center, not the solid hub.
 
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Blacksheep-1 thank you for that reply. So it is obviously very durable and can manage high rpm shifts, which is great. Do you have any idea if it shudders at takeoff?
 
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It has the syntered clutch material so it would have the tendency to do that more than an organic one, if you look at a standard clutch disc you will see a wavy material between the disc material, that along with the hub springs allow for smoother engagement, the syntered hubs don't have that, the full zoot race clutches for drag racing don't have the hub springs either, so every time you let the clutch out it's like launching a pro mod. The real key is the center springs, the solid hubs are either in or out, the ones with springs give you a bit of leeway.

If you look at a standard disc, the cushion spring is what I'm referring to..
zNCNmpWl.jpg

The syntered bronze discs don't have the cushion spring
EqKUOBul.jpg


This is what you're looking for..except for a Ford.

http://www.redline360.com/exedy-hyper-single-corvette-GH01SD1
 
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Excellent diagram, and thank you for that information.

I think that I will just shut up and live with my RST because it is really superb once the car is rolling.
 
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Well FWIW I don't recall the Hypers chattering even after a beating. We did kill one at VIR but it had a ton of time on it, and it was completely unexpected, we just didn't have issues with them.
 

drano38

Wayne
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I ordered the Exedy Hyper Single EH06SD1 today from Team Beefcake Racing. Based on Blacksheep's posts, its great for the track. I also got info from Drew since he recently installed it in his Boss. Since I also drive on the street, I wanted to know how it worked for him in the paddock and grid (which would give me some indication of how it will act in a parking lot, stop light, etc). He said it will do well on the street, and be only a bit more grabby than my stock clutch.
Great info on this tread.
 

drano38

Wayne
1,130
318
Exedy Hyper Single and MGW race spec are here.
I'll also put in a new pilot bearing, thowout bearing, and ARP flywheel bolts.
And I'll install LMR's dedicated clutch fluid reservoir.
Anything else?
CJ pulse ring?
Clutch line--do these really help? LMR has one for $53.99
 
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I’ve run an Exedy Hyper Single for three seasons with my Magnum XL. It is not grabby at all. It takes more pedal effort than the factory clutch, but I do not have a pedal return spring installed. But, it is not bad. I run the lightened steel flywheel that comes in the kit.

I wish Exedy had an aluminum flywheel option. I ran an RXT with an aluminum flywheel for two years. I loved the aluminum flywheel on the track. Not only does the engine rev a lot faster, if you don’t match RPMs on a downshift you get less rear tire shock / hop with the aluminum compared to steel. Basically, you are less likely to upset the car’s balance if you miss a downshift with the aluminum flywheel.

But, in a street car that sees a lot of stop and go traffic, I would recommend a lightened steel flywheel. The steel flywheel requires less clutch slip to get the car moving.
 
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