I don’t understand.... Harmonic balance, flywheel

Raymond56 · 09-25-2005, 04:09 AM

I have a 351W. I’m told I have to use a 28 oz flywheel since the 351 comes with a 28oz harmonic balance.
My question is can I put a 50 oz harmonic balance on the eng. And use a 50oz factor flywheel?
I don’t understand to much about this balance stuff. Could someone fill me in and tell me if swapping the harmonic balance will work? If not why? Help me understand this flywheel and harmonic balance relation to each other and the eng.
Thanks

BLACK85GT · 09-25-2005, 11:30 AM

I am not totally shure on this, but I believe the 351 requires the 28 ounce balance to balance the crankshaft. Also early 302's, use the 28 oz.
The balancer balances the crank, not the flywheel. The flywheel has to be matched to the crank and balancer. If you dont get any other answers, call summit and talk to one of the techs, and they will explain it better.

Raymond56 · 09-25-2005, 12:07 PM

That makes sence, and I tank you but I'm sure there is more to it than that.......
example,,
The harmonic balance can only go on the crank in one position becouse it has to matched to the keyway, gut the flywheel can be bolted on to the crank in any posistion even though it is off balance?
depending on where you posisition the flywheel, woulnt you think it would off balance the crank?

Rev · 09-25-2005, 01:48 PM

The bolt holes for the flywheel/flexplate in the crank are arranged so that it will only go on one way. Same with the balancer and keyway. This is referred to as external balancing.

Rev

rwhite65 · 09-25-2005, 01:59 PM

Rev is absolutely correct. If you hold the flywheel up, the holes are semi-closs, but as you rotate the flywheel the holes will line up perfectly when they reach the proper placement position.
Ryan

Raymond56 · 09-25-2005, 04:49 PM

This is the first time I mixed and matched a eng. and trans....I learned something new today...
All the other clutches I replaced were for stock cars and I never noticed that the holes were offset, Daaa!
I Just don't have the money to go out and buy a new Flywheel.
I found a machine shop that will take my 50oz Flywheel down to a 28oz for $60.00 and resurface for another $50.00 $120.00......
Thanks guys........

rwhite65 · 09-25-2005, 07:02 PM

U realize you can buy a flywheel for new, for about half that?
Ryan

Raymond56 · 09-25-2005, 08:15 PM

Quote:

Originally Posted by rwhite65

U realize you can buy a flywheel for new, for about half that?
Ryan

Oh Ya! You tell me where?
No way can you buy a Flywheel, 157-Tooth, 10.50 in. Diameter,
28oz External Balance for a Ford, 351W. Let alone the cost of S&H to Hawaii.....

Summit Raceing List them at $239.95 each S&H not included.
See link below.......

http://store.summitracing.com/partd...k=KeywordSearch

grey88gt · 09-25-2005, 08:20 PM

Raymond Ill look at work, and see what I can get you one for. I ship parts all over the place.

82 GT · 09-25-2005, 09:05 PM

Quote:

Originally Posted by Raymond56

Oh Ya! You tell me where?
No way can you buy a Flywheel, 157-Tooth, 10.50 in. Diameter,
28oz External Balance for a Ford, 351W. Let alone the cost of S&H to Hawaii.....

Summit Raceing List them at $239.95 each S&H not included.
See link below.......

http://store.summitracing.com/partd...k=KeywordSearch

I agree, the 157 tooth flywheels are expensive to buy new and hard to find used.

Raymond56 · 09-25-2005, 10:17 PM

Quote:

Originally Posted by 82 GT

I agree, the 157 tooth flywheels are expensive to buy new and hard to find used.

82GT that is realy nice of you. Althow The only Flywheel the make with 157 tooth 28oz balance that will take a 10.5" clutch are all after market Flywheels.

All the stock Flywheels that are 157 tooth and 28oz will only except a 10" clutch

Do you live in Hawaii? Just wondering.....................

Hey thanks anyway...It's the thought that counts....

Mahalo! ( thanks ) Raymond

Raymond56 · 09-25-2005, 10:20 PM

Quote:

Originally Posted by grey88gt

Raymond Ill look at work, and see what I can get you one for. I ship parts all over the place.

OP's This is the rite QUOTE not the other one.. LOL...lol....

rwhite65 · 09-25-2005, 11:52 PM

I did not know you lived in Hawaii, maybe I missed that and just didnt read it.
my bad

82 GT · 09-26-2005, 07:20 AM

Oh.....I must have missed the 10.5 part.
My bad

Falcons Talon · 09-26-2005, 11:10 AM

I have an extra one that I will let go for $50.00 plus shipping. I bought it for my 351 swap. It is a 28 oz imbalance w/ 157 tooth. The only problem is that it didn't line up with my clutch pegs/bolt holes. ??? I don;t know which clutch application it would take. I ended up going with the Ford Racing flywheel.

grey88gt · 09-26-2005, 12:50 PM

Raymond sry cant even get close. I dont have a good source for it. My cost on that fly-wheel is 317.00 WOW! That sucks. Sry I did look. I have a friend that may have one , Ill let you know. Looks like you better jump on the one Falcons Talon has. I didnt realize they were so exspensive.

82 GT · 09-26-2005, 12:51 PM

Quote:

Originally Posted by Falcons Talon

I have an extra one that I will let go for $50.00 plus shipping. I bought it for my 351 swap. It is a 28 oz imbalance w/ 157 tooth. The only problem is that it didn't line up with my clutch pegs/bolt holes. ??? I don;t know which clutch application it would take. I ended up going with the Ford Racing flywheel.

WOW!!...$50.....you better grab that before I do!

Just kidding

Falcons Talon · 09-26-2005, 01:04 PM

I just want to clarify that I'm not sure which clutch app it will take. The flywheel bolted up perfectly to the block, but the pressure plate pegs/bolt holes didn't line up. It's never been rotated on the engine.

Raymond56 · 09-27-2005, 12:05 AM

Quote:

Originally Posted by Falcons Talon

I have an extra one that I will let go for $50.00 plus shipping. I bought it for my 351 swap. It is a 28 oz imbalance w/ 157 tooth. The only problem is that it didn't line up with my clutch pegs/bolt holes. ??? I don;t know which clutch application it would take. I ended up going with the Ford Racing flywheel.

Falcons Talon, thats great!... I will buy it if S&H is not to much to Hawaii......
Is this a stock flywheel from a earler model eng? Why I ask is that the early stock flywheels will only except a 10" clutch and I need a flywheel that will take a 10.5 " clutch. If you were puting a 10.5" clutch on to your 351W thats why it didn't fit. If you could mesure the clutch seat on the flywheel (not the entire flywheel) where the dick sits, you will be able to tell what disk it will except.

Let me know
Thanks
Raymond

Raymond56 · 09-27-2005, 02:12 AM

Quote:

Originally Posted by Raymond56

If you could mesure the clutch seat on the flywheel (not the entire flywheel) where the disk sits, you will be able to tell what disk it will except.

Let me know
Thanks
Raymond

Just a small correction in the QUOTE..... :-)

09-25-2005, 04:09 AM	#1
Raymond56 Registered Member Join Date: Jun 2005 Posts: 12	I don’t understand.... Harmonic balance, flywheel I have a 351W. I’m told I have to use a 28 oz flywheel since the 351 comes with a 28oz harmonic balance. My question is can I put a 50 oz harmonic balance on the eng. And use a 50oz factor flywheel? I don’t understand to much about this balance stuff. Could someone fill me in and tell me if swapping the harmonic balance will work? If not why? Help me understand this flywheel and harmonic balance relation to each other and the eng. Thanks

09-25-2005, 11:30 AM	#2
BLACK85GT Registered Member Join Date: May 2002 Location: Tampa,FLORIDA Posts: 340	Re: I don’t understand.... Harmonic balance, flywheel I am not totally shure on this, but I believe the 351 requires the 28 ounce balance to balance the crankshaft. Also early 302's, use the 28 oz. The balancer balances the crank, not the flywheel. The flywheel has to be matched to the crank and balancer. If you dont get any other answers, call summit and talk to one of the techs, and they will explain it better. __________________ 5.0, Holley heads, 1.7 Scorp Rockers, Stealth intake, Holley 600 carb, Holley Mech. Fuel pump, MSD 6Digital, MSD distributor, Hotchkis upper/lower rear control arms, FMS B Springs, 3:73 (8.8) rear. Production # 9,377

09-25-2005, 12:07 PM	#3
Raymond56 Registered Member Join Date: Jun 2005 Posts: 12	Re: I don’t understand.... Harmonic balance, flywheel That makes sence, and I tank you but I'm sure there is more to it than that....... example,, The harmonic balance can only go on the crank in one position becouse it has to matched to the keyway, gut the flywheel can be bolted on to the crank in any posistion even though it is off balance? depending on where you posisition the flywheel, woulnt you think it would off balance the crank?

09-25-2005, 01:48 PM	#4
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	Re: I don’t understand.... Harmonic balance, flywheel The bolt holes for the flywheel/flexplate in the crank are arranged so that it will only go on one way. Same with the balancer and keyway. This is referred to as external balancing. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

09-25-2005, 01:59 PM	#5
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: I don’t understand.... Harmonic balance, flywheel Rev is absolutely correct. If you hold the flywheel up, the holes are semi-closs, but as you rotate the flywheel the holes will line up perfectly when they reach the proper placement position. Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

09-25-2005, 04:49 PM	#6
Raymond56 Registered Member Join Date: Jun 2005 Posts: 12	Re: I don’t understand.... Harmonic balance, flywheel This is the first time I mixed and matched a eng. and trans....I learned something new today... All the other clutches I replaced were for stock cars and I never noticed that the holes were offset, Daaa! I Just don't have the money to go out and buy a new Flywheel. I found a machine shop that will take my 50oz Flywheel down to a 28oz for $60.00 and resurface for another $50.00 $120.00...... Thanks guys........

09-25-2005, 07:02 PM	#7
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: I don’t understand.... Harmonic balance, flywheel U realize you can buy a flywheel for new, for about half that? Ryan __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

09-25-2005, 08:20 PM	#9
grey88gt Registered Member Join Date: Feb 2004 Location: Skiatook, Oklahoma Posts: 193	Re: I don’t understand.... Harmonic balance, flywheel Raymond Ill look at work, and see what I can get you one for. I ship parts all over the place.

09-25-2005, 11:52 PM	#13
rwhite65 Ride Hard Join Date: Oct 2000 Location: Wyoming IL Posts: 1,094	Re: I don’t understand.... Harmonic balance, flywheel I did not know you lived in Hawaii, maybe I missed that and just didnt read it. my bad __________________ 65 Fastback 91 roller 306, H/C/I AOD-Bauman, PI Stallion, 4.10's and traction loc 04 Grand Cherokee Freedom Edition 79 Ford F-250 4x4 - Restored

09-26-2005, 07:20 AM	#14
82 GT Import Slayer Join Date: May 1999 Posts: 2,241	Re: I don’t understand.... Harmonic balance, flywheel Oh.....I must have missed the 10.5 part. My bad __________________ '82 GT 351W (.060)Comp Cams 274* Extreme Energy cam, ported & polished heads w/ 1.94/1.60 valves 10.3:1 flat top pistons,stealth intake, Mallory dizzy,Holley 750dp carb, BBK shorties,Flowmaster exhaust,C-4 with 3700 stall converter, B&M pro shifter,8.8 rear, 4:10's, subframes, electric fan, powermaster alternator, 4 core radiator.

09-26-2005, 11:10 AM	#15
Falcons Talon T.P.M. President Join Date: May 2002 Location: Brownsville Posts: 265	Re: I don’t understand.... Harmonic balance, flywheel I have an extra one that I will let go for $50.00 plus shipping. I bought it for my 351 swap. It is a 28 oz imbalance w/ 157 tooth. The only problem is that it didn't line up with my clutch pegs/bolt holes. ??? I don;t know which clutch application it would take. I ended up going with the Ford Racing flywheel. __________________

09-26-2005, 12:50 PM	#16
grey88gt Registered Member Join Date: Feb 2004 Location: Skiatook, Oklahoma Posts: 193	Re: I don’t understand.... Harmonic balance, flywheel Raymond sry cant even get close. I dont have a good source for it. My cost on that fly-wheel is 317.00 WOW! That sucks. Sry I did look. I have a friend that may have one , Ill let you know. Looks like you better jump on the one Falcons Talon has. I didnt realize they were so exspensive.

09-26-2005, 01:04 PM	#18
Falcons Talon T.P.M. President Join Date: May 2002 Location: Brownsville Posts: 265	Re: I don’t understand.... Harmonic balance, flywheel I just want to clarify that I'm not sure which clutch app it will take. The flywheel bolted up perfectly to the block, but the pressure plate pegs/bolt holes didn't line up. It's never been rotated on the engine. __________________

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Hi! Newbiew w/ a 5.0 flywheel clutch question!	Beanhead	Windsor Power	10	11-01-2002 07:15 PM
Fidanza Flywheel Dowel Pins	RICKYRM125CC	Windsor Power	0	10-27-2002 07:42 PM
Wrong Balance - HOW Evident ?????	gp001	Windsor Power	2	02-28-2002 05:38 PM
Aluminum Flywheel Help	buck95	Windsor Power	6	12-02-2001 07:29 AM
T-5 SWAP Vintage flywheel balance	Jim D	Classic Mustangs	1	05-26-1999 01:45 AM