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Old 09-16-2010, 06:41 PM   #1
Gord. B by the bay
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Default Lighten an A flywheel

What is the maximum weight that may be removed? Many Thanks Gord. B by the Bay
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Old 09-16-2010, 07:36 PM   #2
cannon
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Default Re: Lighten an A flywheel

gord: go with a 49=53 ford: will have to do some mods on the starter, really lets the banger wind up. fly wheel and clutch aprox 35 lbs......
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Old 09-16-2010, 08:00 PM   #3
James Rogers
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Default Re: Lighten an A flywheel

I have a 35# flywheel in my Cabriolet and love it. Made from a model A flywheel. I have seen them as light as 25#.
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Old 09-17-2010, 06:10 AM   #4
2manycars
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Default Re: Lighten an A flywheel

The one in my tudor is 45 pounds.
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Old 09-17-2010, 06:41 AM   #5
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Default Re: Lighten an A flywheel

I had mine lightened to 38 lbs. I have seen others say they use some as light as 9 to 12 lbs, but they're aluminum.
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Old 09-17-2010, 07:10 AM   #6
BRENT in 10-uh-C
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by 2manycars View Post
The one in my tudor is 45 pounds.
Quote:
Originally Posted by LeroyM View Post
I had mine lightened to 38 lbs. I have seen others say they use some as light as 9 to 12 lbs, but they're aluminum.

Guys, are we not reading what the man's question is?



Gord, you can safely remove about 42 pounds from an 'A' flywheel if you use the stock pressure plate, --and about 45 pounds if you convert to a V8 style pressure plate. THAT is about the maximum amount of weight that can safely be removed. The one below was in Pennie's race car for several years and has been 'spooled' many times over 3,000 RPM's.

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Old 09-17-2010, 08:14 AM   #7
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Default Re: Lighten an A flywheel

Now Thats a coool Flywheel! I want one now.
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Old 09-17-2010, 10:31 AM   #8
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Default Re: Lighten an A flywheel

A 49-53 Ford V-8 flywheel weights about 29# stock. They may not be drilled for a 9" Long type clutch which you will want. Most were drilled for 10-11" clutches. The starter rework involes reversing the the old style bendix, milling a keyway near the output end of the starter, machining that end plate and using one of those bendix springs you bought at the swap meet that when you got it home it was backwards. Maybe the real trick is providing a "third" starter bushing in the bellhousing to support the shaft end. I have the infor to do this and have done it, so if you are thinking about this I could send it to you. If you decide to go with it you could call me(your nickle from the Maritines) and I will got over it with you.
Steve-Santa Rosa
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Old 09-17-2010, 10:37 PM   #9
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Default Re: Lighten an A flywheel

I'm running one in my 30 Coupe; the A flywheel was cut to 35 lbs.; I use a V8 pressure plate as its 4 lbs lighter than an A pressure plate and a much softer unit.

Be sure to have both units balanced; flywheel 1st then bolt up pressure plate and rebalance as a complete unit.

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Old 09-17-2010, 11:34 PM   #10
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Default Re: Lighten an A flywheel

I cut 26lbs off mine I would like to cut 2-4 more off before i have it balanced
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Old 09-17-2010, 11:37 PM   #11
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by BRENT in 10-uh-C View Post
Guys, are we not reading what the man's question is?



Gord, you can safely remove about 42 pounds from an 'A' flywheel if you use the stock pressure plate, --and about 45 pounds if you convert to a V8 style pressure plate. THAT is about the maximum amount of weight that can safely be removed. The one below was in Pennie's race car for several years and has been 'spooled' many times over 3,000 RPM's.

.
That looks cool.... but I like my legs a lot
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Old 09-18-2010, 01:45 AM   #12
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Default Re: Lighten an A flywheel

I got a 28 lb flywheel from Dan Price, and Dan swedged on the BB type counterweights and balanced everything. Net gain (loss) of weight was only about 17 lbs, but much much smoother at higher RPMS. Not much noticable change in acceleration or shifting but well worth it.
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Old 09-18-2010, 10:08 AM   #13
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by callcoy View Post
A 49-53 Ford V-8 flywheel weights about 29# stock. They may not be drilled for a 9" Long type clutch which you will want. Most were drilled for 10-11" clutches. The starter rework involes reversing the the old style bendix, milling a keyway near the output end of the starter, machining that end plate and using one of those bendix springs you bought at the swap meet that when you got it home it was backwards. Maybe the real trick is providing a "third" starter bushing in the bellhousing to support the shaft end. I have the infor to do this and have done it, so if you are thinking about this I could send it to you. If you decide to go with it you could call me(your nickle from the Maritines) and I will got over it with you.
Steve-Santa Rosa
The third bearing is not a "trick' it is a necessity, If you do not add the support bearing the shaft WILL bend. http://rides.webshots.com/album/558786345HiXnZi
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Old 09-18-2010, 10:10 AM   #14
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by BRENT in 10-uh-C View Post
You are putting words into my mouth that I did not say because I never stated they couldn't explode! You are also comparing apples-to-oranges in my opinion. We are not speaking of SB Chevrolet engines, we're not turning 6000 rpms, ...and please explain the picture of the pump being driven off the back of the camshaft where the stock flywheel would normally reside. "Most likely" there is more to that story than what you are eluding to. Bottom line is if you do not feel comfortable with my flywheel or how I have used it, then kindly move on and your opinions reserved.

I dont know any thing about the pic. I was looking for one I saw about a year ago with a much lower hp engine but could not find. I dont mean to put words in your mouth and dont wont to start any think becouse I like reading your posts. you all ways have lots of info to share
Bill




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Old 09-18-2010, 11:18 PM   #15
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Default Re: Lighten an A flywheel

A little defensive there Brent, he can say what he likes, in 10 UHHHHHHHHH c
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Old 09-19-2010, 06:44 AM   #16
BRENT in 10-uh-C
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by sonny30coupe View Post
A little defensive there Brent, he can say what he likes, in 10 UHHHHHHHHH c
I don't what you are talking about.


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Old 09-19-2010, 06:53 AM   #17
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by BRENT in 10-uh-C View Post
Guys, are we not reading what the man's question is?




.
Your answer was not much better than ours. We posted what our flywheels are as an indication of what could be done, because it HAD been done. That, while not answering the question exactly, was useful information. Your answer said "about" in your figure, so it also is not an exact figure. Stop finding fault with people who are trying to help.
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Old 09-19-2010, 07:46 AM   #18
BRENT in 10-uh-C
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Default Re: Lighten an A flywheel

Quote:
Originally Posted by 2manycars View Post
Your answer was not much better than ours. We posted what our flywheels are as an indication of what could be done, because it HAD been done. That, while not answering the question exactly, was useful information. Your answer said "about" in your figure, so it also is not an exact figure. Stop finding fault with people who are trying to help.
I am not finding fault. The answer you gave was incorrect as it is not the maximum weight or even anywhere close to what Gord asked. Matter of fact, someone many hours before your post who has WAY more experience with Gord's question already gave a number that was less weight than yours, so it truly begs the question why you even made your comment. Why didn't you also post the color of your Model A, --or the type of tires you have because that would have had the same amount of relevance! How would it be helpful to his question??

AND, with regard to my comment using the word "about", ...is it possible you have no understanding of what is truly involved in machining a stock flywheel? Do you realize that many things factor in such as additional weight removed afterwards during balancing, --or composition of the metal itself affect the exact total weight? Is your Tudor's flywheel exactly 45 lbs, --or is it 44 lbs, 10 ozs, .........or some other number that is "almost" 45 pounds??

It is NOT my intent to be a forum police however I do intend to provide accurate and relevant answers to the question(s), --and just like I expect others to do to me, I will point out errors or misinformation when I see it. If that offends you or anyone else, well I make no appologies in that regard.
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Last edited by BRENT in 10-uh-C; 09-19-2010 at 08:02 AM. Reason: spelling
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Old 09-19-2010, 09:07 AM   #19
rotorwrench
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Default Re: Lighten an A flywheel

I wouldn't recommend whittling anything off a flywheel to someone I didn't know. There is a liability to any recommendation where a spinning mass is involved. We all know it has been done but what is "SAFE" is anyones guess.

Be carefull guys. Also, it's not worth contention. Experimintation is up to the individual to decide.

Kerby
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Old 09-19-2010, 09:17 AM   #20
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Default Re: Lighten an A flywheel

ok , back on the flywheel . i had 20#s taken off mine & v-8 clutch & balanced . works great for me ................ steve
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