The Ford Barn

hardtimes · 03-19-2015, 02:55 PM

I have my A flywheel cut down and now need to decide on best pressure plate to use. Want ease of leg push pressure and also want one that does NOT tend to SLIP over time. I've been told that the diaphragm is the best/right pressure plate to achieve my goals.
So, If anyone uses and/or knows what part # of diaphragm pressure plate will work, with Model A flywheel, please give type vehicle and part # for me to buy.

And, are you aware of any downside to using a diaphragm pressure plate. This style seems to be newest innovation in automotive, no

CarlG · 03-19-2015, 03:23 PM

This is what I am using: Just make sure you get your flywheel/pressure plate assembly balanced as a unit.

Tom Wesenberg · 03-19-2015, 03:48 PM

My friend's 1949 Chevy pickup has a nice soft clutch pedal, and I believe it's a diaphram style, so they go back some years.
I wonder if Carl's is just as easy to push?

Ron in Quincy · 03-19-2015, 04:14 PM

If you use the diaphragm pressure plate you have to relieve the opening of the fingers in order to clear the snout on the bearing retainer so the throughout bearing will work properly.

I have this type pressure plate in my 29 Roadster; it is very positive when engaged.

Ron

hardtimes · 03-19-2015, 09:32 PM

Quote:

Originally Posted by CarlG

This is what I am using: Just make sure you get your flywheel/pressure plate assembly balanced as a unit.

Hey Carl,
You always seem to come to the rescue

!
Now....what is the identification of this diaphragm unit ?

Yes, balance is the very next step ...after acquiring the part !

hardtimes · 03-19-2015, 09:38 PM

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Quote:

Originally Posted by Ron in Quincy

If you use the diaphragm pressure plate you have to relieve the opening of the fingers in order to clear the snout on the bearing retainer so the throughout bearing will work properly.

I have this type pressure plate in my 29 Roadster; it is very positive when engaged.

Ron

Thanks Ron,
By 'relieve' , I take it that you are saying to put the bearing retainer in the opening and grind the fingers until clearance is had..no ?

Yes, my 'research' has resulted in the same finding, i.e.- positive engagement , and less slippage ! That would/should give long life and peace of mind, eh

!

Now , what was the model/part # of the diaphragm unit that you used

CarlG · 03-19-2015, 10:44 PM

Quote:

Originally Posted by hardtimes

Hey Carl, ... Now....what is the identification of this diaphragm unit ?

Just hover over the picture (or click on it), mfr & part # are there.

CarlG · 03-19-2015, 10:47 PM

Quote:

Originally Posted by Tom Wesenberg

My friend's 1949 Chevy pickup has a nice soft clutch pedal, and I believe it's a diaphram style, so they go back some years.
I wonder if Carl's is just as easy to push?

Don't know if it equals your friend's truck, but it is pretty easy on my old arthritic legs.

hardtimes · 03-20-2015, 11:29 AM

Quote:

Originally Posted by CarlG

Just hover over the picture (or click on it), mfr & part # are there.

Hey Carl,
Yup, arithmetic legs and unfortunately more....
I do not have the hover and click ability, but see some faint markings. If you can pm me with that info , I'd appreciate that

Mikeinnj · 03-20-2015, 12:48 PM

Quote:

Originally Posted by CarlG

Just hover over the picture (or click on it), mfr & part # are there.

Photo is too blurry when enlarged. Can't you write the info here for all to see ?

Bob C · 03-20-2015, 01:12 PM

On my computer I just put the cursor on the picture and
Sachs BBC1904 pops up.

Bob

jimvette59 · 03-20-2015, 01:36 PM

Is this just for a Model A or will this work in my 53 Merc.? Will I have to grind the fingers to clear the snout on the bearing retainer. I don't know if the Model A retainer is the same dia. as the V8 fords.

CarlG · 03-20-2015, 01:42 PM

Quote:

Originally Posted by Bob C

On my computer I just put the cursor on the picture and
Sachs BBC1904 pops up.

Bob

Exactly!

hardtimes · 03-20-2015, 01:51 PM

Quote:

Originally Posted by Bob C

On my computer I just put the cursor on the picture and
Sachs BBC1904 pops up.

Bob

Hey Bob,
YOU are the man

!!
I have no clue what you did or how you did it , but thanks !

I was unable to do what you did, and another barner couldn't figure it either. Maybe my computer has a neophyte operator, eh

!

BTW...While doing a lot of research on this subject, ironically, I just ran across the SAME part number that you just confirmed. Thanks, again.

Walt Dupont--Me. · 03-20-2015, 08:41 PM

I've done this to a few A engine. I've lightened guite a few wheels, cut the lip off flush with the clutch surface, I've lightened some more than others by cutting some out of the wheel. The one in My B engine in my 31 Coupe is 35#. But back to the clutch, in all of them I use the 35-41 V8 9in. clutch and PP I have the wheel redrilled for the 9in. PP, I always have them balanced. I bye all my clutch and PP from Fort Wayne Clutch. There smooth and easy on the leg, Walt

hardtimes · 03-21-2015, 12:27 AM

Quote:

Originally Posted by Walt Dupont--Me.

I've done this to a few A engine. I've lightened guite a few wheels, cut the lip off flush with the clutch surface, I've lightened some more than others by cutting some out of the wheel. The one in My B engine in my 31 Coupe is 35#. But back to the clutch, in all of them I use the 35-41 V8 9in. clutch and PP I have the wheel redrilled for the 9in. PP, I always have them balanced. I bye all my clutch and PP from Fort Wayne Clutch. There smooth and easy on the leg, Walt

Hey Walt,
Thanks for your input

!
I run a 35 lb A flywheel with a Borg/Beck 9'' on the B in my '30 roadster. It has run great for years now. However, after talking with some very experienced/knowledgeable guys here...who are using a diaphragm pressure plate, I've decided to try this type equipment. At this time, I have a '32 B short block that is at the point of needing a pressure plate to balance with my flywheel (s). I have a 38lb Model A and an aluminum Stipe flywheel to chose from. I have been told that he diaphragm pressure plate gives very firm hookup with little, if any, slippage. And, that it is even easier on the left leg , than the B&B V8 9" style, which is a blessing if so.
BTW, Walt, does the pilot bearing have to be installed in the flywheel in order to have it balanced ?

Walt Dupont--Me. · 03-21-2015, 06:45 AM

No,the pilot bearing don't need to in to balance. My balancer does the wheel then bolts on the PP and balance that, The wheels are not out very far but I,ve seen a lot of PP out a long ways. Mark the PP and wheel so the pp will go back on in the right place. Walt

hardtimes · 03-21-2015, 01:20 PM

Quote:

Originally Posted by Walt Dupont--Me.

No,the pilot bearing don't need to in to balance. My balancer does the wheel then bolts on the PP and balance that, The wheels are not out very far but I,ve seen a lot of PP out a long ways. Mark the PP and wheel so the pp will go back on in the right place. Walt

Hey Walt,
THANKS buddy for all your help, now and in the past

!

Do you have any pictures of A/B completed engines that you can share examples of your work !

Walt Dupont--Me. · 03-21-2015, 01:34 PM

Quote:

Originally Posted by hardtimes

Hey Walt,
THANKS buddy for all your help, now and in the past

!

Do you have any pictures of A/B completed engines that you can share examples of your work !

I'm building one right now, i'll take some pic and post them. Walt

Ron in Quincy · 03-21-2015, 02:10 PM

As a side note:

I made a conversion, using a multi disc bell housing and early transmission so I could use the correct early pedals; a regular flywheel was cut down to 35 pounds including the new ring gear, balanced and set up for the 9" V8 pressure plate; I had to modify the inside of the bell housing to clear the pressure plate.

I have since found, using the 10" diaphragm pressure plate, due to its low profile, no changes to the interior of the bell housing is required.

Ron Rude

03-19-2015, 02:55 PM	#1
hardtimes Senior Member Join Date: May 2010 Location: South California Posts: 6,190	Pressure plate ID Q.... I have my A flywheel cut down and now need to decide on best pressure plate to use. Want ease of leg push pressure and also want one that does NOT tend to SLIP over time. I've been told that the diaphragm is the best/right pressure plate to achieve my goals. So, If anyone uses and/or knows what part # of diaphragm pressure plate will work, with Model A flywheel, please give type vehicle and part # for me to buy. And, are you aware of any downside to using a diaphragm pressure plate. This style seems to be newest innovation in automotive, no Last edited by hardtimes; 03-19-2015 at 09:28 PM. Reason: ........

03-19-2015, 03:48 PM	#3
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: Pressure plate ID Q.... My friend's 1949 Chevy pickup has a nice soft clutch pedal, and I believe it's a diaphram style, so they go back some years. I wonder if Carl's is just as easy to push?

03-19-2015, 04:14 PM	#4
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: Pressure plate ID Q.... If you use the diaphragm pressure plate you have to relieve the opening of the fingers in order to clear the snout on the bearing retainer so the throughout bearing will work properly. I have this type pressure plate in my 29 Roadster; it is very positive when engaged. Ron

03-20-2015, 01:12 PM	#11
Bob C Senior Member Join Date: May 2010 Location: So Cal Posts: 9,360	Re: Pressure plate ID Q.... On my computer I just put the cursor on the picture and Sachs BBC1904 pops up. Bob

03-20-2015, 01:36 PM	#12
jimvette59 Senior Member Join Date: Jun 2010 Location: Perry OH Posts: 1,369	Re: Pressure plate ID Q.... Is this just for a Model A or will this work in my 53 Merc.? Will I have to grind the fingers to clear the snout on the bearing retainer. I don't know if the Model A retainer is the same dia. as the V8 fords.

03-20-2015, 08:41 PM	#15
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Pressure plate ID Q.... I've done this to a few A engine. I've lightened guite a few wheels, cut the lip off flush with the clutch surface, I've lightened some more than others by cutting some out of the wheel. The one in My B engine in my 31 Coupe is 35#. But back to the clutch, in all of them I use the 35-41 V8 9in. clutch and PP I have the wheel redrilled for the 9in. PP, I always have them balanced. I bye all my clutch and PP from Fort Wayne Clutch. There smooth and easy on the leg, Walt

03-21-2015, 06:45 AM	#17
Walt Dupont--Me. Senior Member Join Date: May 2010 Location: Gardiner Me. Posts: 4,200	Re: Pressure plate ID Q.... No,the pilot bearing don't need to in to balance. My balancer does the wheel then bolts on the PP and balance that, The wheels are not out very far but I,ve seen a lot of PP out a long ways. Mark the PP and wheel so the pp will go back on in the right place. Walt

03-21-2015, 02:10 PM	#20
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: Pressure plate ID Q.... As a side note: I made a conversion, using a multi disc bell housing and early transmission so I could use the correct early pedals; a regular flywheel was cut down to 35 pounds including the new ring gear, balanced and set up for the 9" V8 pressure plate; I had to modify the inside of the bell housing to clear the pressure plate. I have since found, using the 10" diaphragm pressure plate, due to its low profile, no changes to the interior of the bell housing is required. Ron Rude