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03-18-2018, 12:37 AM | #1 |
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Diaphragm Clutch
On lightened flywheels and V8 Clutch conversions, diaphragm pressure plates and clutch discs are becoming popular.
I would like to know what vehicle the clutch comes out of and the comparative advantages and disadvantages of this setup over the more conventional "long clutch" from early Ford V8 Thanks Richard Anaheim CA |
03-18-2018, 07:39 AM | #2 |
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Re: Diaphragm Clutch
Richard, I believe the early 60's Chevy 6 cylinder cars with a 9" disk.
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03-18-2018, 11:12 AM | #3 |
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Re: Diaphragm Clutch
Richard,
If you decide to use the diaphragm clutch, the fingers at the center must be machine shortened, otherwise they will not clear the throw out bearing. You can use the same clutch disc as used with the V8 and A . Also, the flywheel must be drilled and tapped for the diaphragm or V8 pressure plate. Also the diaphragm clutch is much lower profile than the V8. I am sure you know the above information but thought it would not hurt to list again. Here in Quincy we are lucky that one of our members has a nice complete shop set up at he residence and does any machine work we may need. Ron |
03-18-2018, 11:38 AM | #4 |
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Re: Diaphragm Clutch
Richard, Here is a substitute clutch plate for the Ford Long V8 plate.
You do not have to enlarge the center arms and theybhave the correct angle for the Ford throw out bearing and hub. There is a 10 and 11”. The 10” is the one. https://www.rockauto.com/en/catalog/...ure+plate,1988 Ford Barn V8 discussion. https://fordbarn.com/forum/showthread.php?t=159786 John Last edited by john in illinois; 03-18-2018 at 12:01 PM. |
03-18-2018, 12:10 PM | #5 |
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Re: Diaphragm Clutch
Clutch Masters in Rialto, I've heard, stocks a lightened wheel and diaphragm clutch. I believe it uses a Ford Ranger pickup clutch cover.
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03-18-2018, 02:57 PM | #6 |
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Re: Diaphragm Clutch
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03-18-2018, 06:39 PM | #7 |
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Re: Diaphragm Clutch
Thanks guys.
I can always depend on Fordbarn when my brain takes a vacation |
03-18-2018, 10:36 PM | #8 |
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Re: Diaphragm Clutch
I have a diaphragm clutch plate in my pickup. It came with the lightened flywheel I bought from Ron Kelley.
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03-19-2018, 12:44 AM | #9 | |
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Re: Diaphragm Clutch
Quote:
Hey Richard, I have installed a new diaphragm pressure plate on my new B rebuild. It is 9", and I got the model / part # from CarlG here. As Carl says, his came on his engine from the rebuilder. I think that I have the part # somewhere, if you think that that would be of any help, I'll look for it ? I've been using the B on a stand as a test mule. The parts (pressure plate/disc and flywheel) was balanced out as a unit. It runs out very smooth ! BTW...I don't know anything about the comment that you must do some mod to the clutch fingers. I have tried a new throw out bearing on the model pressure plate that I used and I can't see a problem. Last edited by hardtimes; 03-19-2018 at 12:47 AM. Reason: .......... |
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03-19-2018, 07:56 AM | #10 |
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Re: Diaphragm Clutch
The only shortcoming of that clutch is, when the Diaphragm decides to crack, it slips INSTANTLY!!! And "hopefully" COASTS HOME!
Bill Veryoldclutchrebuilder
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03-19-2018, 08:13 AM | #11 |
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Re: Diaphragm Clutch
"BTW...I don't know anything about the comment that you must do some mod to the clutch fingers."
The fingers on the pp "grow" inward as the clutch is depressed. Note the groove cut. There's no apparent interference ... until the cutch is depressed ... then clutch pedal hangs up. Any need for modification would depend on the pp selected. throwoutdisphragm.jpg
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03-19-2018, 08:27 AM | #12 |
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Re: Diaphragm Clutch
A 9 inch pressure plate from a early ford ranger will work. Just needs new mounting holes.
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03-19-2018, 08:59 AM | #13 |
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Re: Diaphragm Clutch
That sounds odd compared to my experience, I had a diaphragm clutch in a 1980 F-150 that cracked and then wouldn't release.
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03-19-2018, 02:07 PM | #14 | |
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Re: Diaphragm Clutch
Quote:
Hey Hoop, I see what you're saying. I think that's why the pp that I have on the spare engine is working, as it was researched by an engine builder and found to not have to be altered. Thanks for the picture, it looks different from my pp. Also, I've often heard some say that you need to use a 'special' throw-out bearing when using diaphragm pp. Again, my new bearing fits pp very well. My guess is that the 'fingers' , is shaped differently , may require a different bearing ? But, how to know what bearing ?? |
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03-19-2018, 03:14 PM | #15 |
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Re: Diaphragm Clutch
When I changed my Corvette from 3 finger to diaphragm type the throwout bearing had to be changed from flat faced to curved face as the multiy fingers of the diaphragm clutch change angle as the bearing is pressed in to it.
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03-19-2018, 03:45 PM | #16 | |
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Re: Diaphragm Clutch
Quote:
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03-20-2018, 01:57 AM | #17 |
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Re: Diaphragm Clutch
Hey Carl,
Thanks much for that post and information. Yeah, I took your advice/info and have that setup on my new B. BTW.. hovered of picture just as you advise..nothing. Wonder if it is just me/my machine here or what. A short time ago (month or so) something happened. I also can't now put up the little smiley faces, can't post pictures as used to and now can't 'hover'..(smiley face here!). Always a silver lining, if looked for though. For years, till now, when I looked at several pictures posted by anyone, I had to look at one at a time and go back an then another so forth. NOW, all of a sudden it is back like in the old days...i.e.-, I can now view first picture then just click on 'next' and voila..whoohoo ! What the heck, I'll settle for that. Past bedtime and most likely not making sense. |
03-20-2018, 11:22 AM | #18 |
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Re: Diaphragm Clutch
If you use the original flat-faced bearing, it will work but will likely give a funny feel to the clutch and not release as smoothly. The first diaphragm clutch I installed was from a high performance Mustang and the fingers rubbed on the front bearing retainer, at the very front. I merely ground a little off the internal finger diameter and all was well. The second one, from a Ranger pickup was fine as-is.
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03-20-2018, 02:02 PM | #19 |
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Re: Diaphragm Clutch
When I first posted that picture, the "hover" worked. 5 minutes later it didn't, so that is why I went back and posted the part number. Go figure!
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03-20-2018, 03:39 PM | #20 |
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Re: Diaphragm Clutch
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