Clutch ID

[chopperloco]

Clutch ID
Going to try to post a pic...
Does anyone recognize this clutch?
it's going in front of a Doug Nash 5 speed crash box, behind a small block in a 65 Vette,not positive which release bearing to use..

https://www.facebook.com/photo.php?f...oqSEUAlK&ifg=1

[Maverick]

Looks like a Hays Mark XII, that's the paint has been removed. They stated the extra bolts would keep it from flexing. Was a few pounds heavier, looks like they did not use all the bolts. Probably use a flywheel for a regular six bolt pattern

[FED 387]

Yep I think its a Hays Mark XII Long style pressure plate-- you will need a throwout bearing for a FORD if I remember right ---make sure the face of the bearing lines up with the levers on the clutch--- there are several different styles of bearings not everyone will work correctly---set the air gap fairly close as the disc will expand as it heats up--- Been a long time since I ran one of those but .028-.030 comes to mind --- if your flywheel has bolt holes for 12 bolts use them all it will prevent warping of the ring on the pressure plate--- set your clutch pedal fairly high so a slight depressing will allow the clutch to dis engage---- you don't need to go all the way to the floor with the pedal----if you want to shift from a forward gear to reverse gear push the clutch pedal down and pull the shift lever into reverse you will feel it pop into gear--- if you buzz the trans and it does not go directly into gear you might have to pull the trans and clean the burrs off the synchro rings --- if you booger up the synchro rings it WILL NOT go into gear at high RPM Shifts--- essentially you will miss the gear----use HEIM joints to fasten the shifter arms to the plate shifter arms on the trans--- great working trans we had 4 of them and after figuring out all the idiosyncrasies about them they worked flawlessly--also go get a extra set of snap rings for the trans you will need them----FED 387

[Mike Pearson]

That is an old hays unit. That thing will tear up everything you have. They are about 3000 lbs base pressure. I used to run one back on the late 70’s with a Doug Nash 5 speed. Broke everything I put behind it. Do yourself a favor and get a good clutch. I even took half of the sprins out of mine and it was still to strong

[FED 387]

there are 2 different bearings a "tall" and a "short" version--- I think its the tall bearing --also make sure you reinforce the clutch fork with a gusset and use a home made rod from the Z bar to the fork with heim joints left and right thread on the either end and a bolt that holds the ends to the Z bar and the fork--- don't use the stock stuff it will flex and bend and its sloppy too--FED 387

[weedburner]

Not sure if it's legal for the racing you intend to do, but you could easily soften the hit of that clutch with a ClutchTamer.

[Maverick]

It looks like six of the springs are adjustable on pressure, using a Allen wrench , flip it over and see if it has a aluminum drive plate with a steel insert, or a cast iron drive plate. And a Aluminum flywheel, with a steel insert, would take some energy away from the hit. Could be a good piece, also depends what type of clutch disc composition you are going to use. And it appears to be for high rpm shIfting since there is no counter weight

[Chevy55]

Save yourself a lot of heart ache and do it right the first time, Take the guess work out of it, call Rob at Advance Clutch. You'll be glad that you did!!!


https://www.advancedclutch.com/

[Ralph A Powell]

It's a long style hays thick cover fingers from the large circle appear to for the large Ford throw out bearing for the 13/8 input shaft

Originally Posted by chopperloco

Clutch ID
Going to try to post a pic...
Does anyone recognize this clutch?
it's going in front of a Doug Nash 5 speed crash box, behind a small block in a 65 Vette,not positive which release bearing to use..

https://www.facebook.com/photo.php?f...oqSEUAlK&ifg=1

[Rory McNeil]

Its actually called a Borg&Beck/Long hybrid. The Long fingers are installed in a Borg & Beck cover, and I believe rather than use the Longs counterweighted fingers, they used the Borg & Becks roller counterweight inside the cover. I never ran one, but I understand the Long style forged levers have a faster ratio than the B&B versions stamped steel levers.