The Ford Barn

1930artdeco · 01-02-2011, 08:01 PM

Hi All,

O.K. my plan is to counterweight my crank and then shave the flywheel to keep the weight the same. Now, I think the flywheel weighs in at 65lbs. (or there abouts) and it needs to be shaved down by around 20lbs. Is it worth while to shave another 5-10lbs off? Or is the extra weight shaved off not going to be beneficial?
I am not trying to shave huge amounts of weight. I just want to give her a little more oomph.

Mike

Bruce of MN · 01-02-2011, 08:35 PM

Search for recent posts on this subject.

Ice man · 01-02-2011, 08:40 PM

30 Lbs is normal with a C/W Crank.

James Rogers · 01-02-2011, 09:16 PM

The stock flywheel is 62# without the starter ring. I cut the raised ring off and lighten it by 11#. I then drill it for the V8 pressure plate which is 6# lighter. This makes the assembly 17# lighter for a complete weight with a new starter ring of 72#. The flywheel is balanced to +/-2 grams (some to 0). I also do custom weights for slightly more money. If you need more info or would like to buy one already done, contact me. http://www.model-a-ford-4bangers.com/
The number is at the bottom of the page.

Tinker · 01-02-2011, 10:13 PM

What has to be done to the pressure plate on a lighten flywheel?

Pete · 01-03-2011, 12:06 AM

Sponsored Links (Register now to hide all advertisements)

Are you going to use a straight razor?

Milton · 01-03-2011, 12:54 AM

Quote:

Originally Posted by Tinker

What has to be done to the pressure plate on a lighten flywheel?

That depends on where the weight is removed. As mentioned in an earlier post, the rim where the pressure plate (pp) mounts can be cut off. If it is the pressure plate will need to be changed to a 09A-7563 pp. If the weight is cut from the outside and/or inside diameter the stock pp can be used.

Jim Brierley · 01-03-2011, 12:15 PM

The crank doesn't know how much the flywheel weighs, and vice-versa. A lighter wheel will allow quicker acceleration and deceleration, thus quicker shifts and faster away from the stop sign. The V8 clutch is smoother, a diaphram clutch may be even better?

Bill O'Brien · 01-03-2011, 01:31 PM

I am assuming you have to counter-balance the crank so that it runs smooth with the lightened flywheel?? What would happen if you ran a light weight flywheel with a crank shaft that has not been counter balanced?

Were the crank shafts not counter-balanced because it was easier and quicker to make them that way??

Ron in Quincy · 01-03-2011, 03:55 PM

I'm running a counterbalanced crank; cut down flywheel to 35 lbs, and a diaphram pressure plate. Running this arrangement in two A's. Very satified with results.

Ron

01-02-2011, 08:01 PM	#1
1930artdeco Senior Member Join Date: May 2010 Location: Lynden, Wa Posts: 3,552	shaving flywheel Hi All, O.K. my plan is to counterweight my crank and then shave the flywheel to keep the weight the same. Now, I think the flywheel weighs in at 65lbs. (or there abouts) and it needs to be shaved down by around 20lbs. Is it worth while to shave another 5-10lbs off? Or is the extra weight shaved off not going to be beneficial? I am not trying to shave huge amounts of weight. I just want to give her a little more oomph. Mike __________________ 1930 TownSedan (Briggs) 1957 Country Sedan

01-02-2011, 08:35 PM	#2
Bruce of MN Senior Member Join Date: May 2010 Location: VA Posts: 1,412	Re: shaving flywheel Search for recent posts on this subject.

01-02-2011, 08:40 PM	#3
Ice man Senior Member Join Date: Jun 2010 Location: Southern Pines, N.Carolina Posts: 210	Re: shaving flywheel 30 Lbs is normal with a C/W Crank.

01-02-2011, 09:16 PM	#4
James Rogers Senior Member Join Date: May 2010 Location: Asheville,NC Posts: 3,104	Re: shaving flywheel The stock flywheel is 62# without the starter ring. I cut the raised ring off and lighten it by 11#. I then drill it for the V8 pressure plate which is 6# lighter. This makes the assembly 17# lighter for a complete weight with a new starter ring of 72#. The flywheel is balanced to +/-2 grams (some to 0). I also do custom weights for slightly more money. If you need more info or would like to buy one already done, contact me. http://www.model-a-ford-4bangers.com/ The number is at the bottom of the page.

01-02-2011, 10:13 PM	#5
Tinker Senior Member Join Date: May 2010 Location: MN Posts: 7,053	Re: shaving flywheel What has to be done to the pressure plate on a lighten flywheel?

01-03-2011, 12:06 AM	#6
Pete Senior Member Join Date: May 2010 Location: Wa. Posts: 5,409	Re: shaving flywheel Sponsored Links (Register now to hide all advertisements) Are you going to use a straight razor?

01-03-2011, 12:15 PM	#8
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,092	Re: shaving flywheel The crank doesn't know how much the flywheel weighs, and vice-versa. A lighter wheel will allow quicker acceleration and deceleration, thus quicker shifts and faster away from the stop sign. The V8 clutch is smoother, a diaphram clutch may be even better?

01-03-2011, 01:31 PM	#9
Bill O'Brien Senior Member Join Date: Jul 2010 Location: Pottersville, NJ Posts: 238	Re: shaving flywheel I am assuming you have to counter-balance the crank so that it runs smooth with the lightened flywheel?? What would happen if you ran a light weight flywheel with a crank shaft that has not been counter balanced? Were the crank shafts not counter-balanced because it was easier and quicker to make them that way??

01-03-2011, 03:55 PM	#10
Ron in Quincy Senior Member Join Date: May 2010 Location: Quincy, CA. Posts: 1,708	Re: shaving flywheel I'm running a counterbalanced crank; cut down flywheel to 35 lbs, and a diaphram pressure plate. Running this arrangement in two A's. Very satified with results. Ron