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Author
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Topic: Fly wheel question
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Wayne Brooks
Gearhead Posts: 139
From: Winfield, Ks. 67156
Registered: Jan 2003
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posted 03-26-2003 09:53 PM
   
Switching 351C from C6 to 4 speed. Had 164 tooth auto-flywheel. What flywheel will I need? What other motors and years will crossover? Will the 351W manual flywheel work? And, will the starter from auto work with manual? TIA
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rm302 boss
Gearhead Posts: 680
From: Austin Texas
Registered: Dec 2002
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posted 03-26-2003 11:12 PM
First welcome to the best bunch of yahoo's on the planet... I think that a 302-351w is externaly balenced and a 351c is internaly balenced so i do not think that they interchange..I need some one to double check me on this.. ..ring gears are all 164 tooth for a flywheel ..
Rene
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MrXerox
Gearhead Posts: 348
From: Oklahoma City, Oklahoma
Registered: Nov 2000
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posted 03-26-2003 11:33 PM
That is incorrect. I just went from a C6 to a C4 and I used a 157 tooth flywheel to work with the new small bellhousing that is on my C4. The C6 uses the large bellhousing and the 164 tooth. A flywheel from an older 302 or 351 will work as long as you make sure it has a 28.8 balance on it. You will also need to compare the total lengths of the two transmission to see if your driveshaft will need to be modified and check the front yoke as well as I dont think the 4 speed uses the same spline pattern. Ohh yeah, you will probably need a new crossmember as well...good luck!
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Wayne Brooks
Gearhead Posts: 139
From: Winfield, Ks. 67156
Registered: Jan 2003
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posted 03-27-2003 01:33 AM
quote:
Originally posted by MrXerox:
That is incorrect. I just went from a C6 to a C4 and I used a 157 tooth flywheel to work with the new small bellhousing that is on my C4. The C6 uses the large bellhousing and the 164 tooth. A flywheel from an older 302 or 351 will work as long as you make sure it has a 28.8 balance on it. You will also need to compare the total lengths of the two transmission to see if your driveshaft will need to be modified and check the front yoke as well as I dont think the 4 speed uses the same spline pattern. Ohh yeah, you will probably need a new crossmember as well...good luck!
I should have said that the car had a 351W originally and 4 speed that I am going to use. Just swapping the 351C into it. Only missing the flywheel, pressure plate and disc. The backing plate from the C6 fits therefore told that I need the 164 tooth and starter for a manual, is this correct? TIA
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SteveLaRiviere
Administrator Posts: 42859
From: Saco, Maine
Registered: May 99
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posted 03-27-2003 08:07 AM
That's right. Both 351s are externally balanced, 28.2 oz. offset.------------------
'70 Mustang Mach 1 - '72 Mustang Sprint - '94 F-150 Please remember our sponsors,
Mustangs Plus, NPD, Osborn Reproductions, MyFordPerformance.com, and FordRamAir.com
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MrXerox
Gearhead Posts: 348
From: Oklahoma City, Oklahoma
Registered: Nov 2000
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posted 03-27-2003 09:12 AM
I have a nice 28.8oz 164 tooth flywheel I can sell ya if thats what you need...
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mustangboy
Gearhead Posts: 774
From: Ont, Canada
Registered: Mar 2002
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posted 03-27-2003 11:08 AM
What year is your car?If its the early style 65-66 mustang the 157 tooth flywheel and bellhousing will give you some extra clearance for your exhaust.To avoid confusion the "flywheels" for automatics are called flexplates  I believe the smallblock toploader 4 speeds use the same yoke as the c-4.------------------
1968 mustang j-code sprint.13.69@101 306cu.in, stock ported heads,weiand exellerator,650 holley DP,hedman hedders,comp 292 Magnum cam,4-speed,8 inch 4.11 detroit locker http://mustangsandmore.50megs.com/MembersPics/mustangboy.html
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kewljay223
Gearhead Posts: 363
From: Long Beach, California
Registered: Sep 2002
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posted 03-27-2003 01:07 PM
so does it matter where the flywheel came from (car and/or motor) as long as it bolts up to your crank and has the right balance? Because i have a flywheel from a 75 granada and it has the same bolt pattern as my crank and the bellhousing bolts up to the block too! would it be ok to use this? sorry if this is off topic but it would be cool if this worked.
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Moneymaker
Administrator Posts: 25539
From: Lyons, IL, USA
Registered: May 99
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posted 03-27-2003 01:34 PM
Welcome to M&M  !
Actually, the bell housing you choose will have a little to do with your choice of fly wheel diameters.
Regardless, almost any 157 or 164 tooth, 289,302, 351, or even 300 Ford light truck six fly wheel will work.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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Jeff
Gearhead Posts: 306
From: Moore, OK USA
Registered: Mar 2001
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posted 03-27-2003 03:58 PM
Okay, so you can use a 157 tooth or a 164 tooth 28 oz-in imbalance flywheel. What else? The 157 tooth supports 10" and 10.5" clutches. The 164 tooth supports those plus 11" clutch. If you use 164 tooth then you've gotta use the 164 tooth bell housing and starter too. Simply put, the 164 tooth is heavier duty than the 157. Everyone likes the 157 because its more readily available and continues to be supported by Ford to this day. The 164 is like your Cleveland, its a dinosaur.
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Wayne Brooks
Gearhead Posts: 139
From: Winfield, Ks. 67156
Registered: Jan 2003
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posted 03-27-2003 08:19 PM
Thanks for all the replies! Really appreciate the help. Have been reading everyday for along time and just keep learning more everyday. Its going into a 69 Mach 1 that was an original 351W M car. I have the bellhousing and 4 speed that came with car. Glad to see that these other flywheels will work. But, what about one off a 400 modified?
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kewljay223
Gearhead Posts: 363
From: Long Beach, California
Registered: Sep 2002
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posted 03-28-2003 01:07 AM
how can you tell what the imbalance is of your flywheel? then what the engine's imbalance is so that you get the right flywheel?
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Moneymaker
Administrator Posts: 25539
From: Lyons, IL, USA
Registered: May 99
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posted 03-28-2003 01:17 AM
All SBF's built before 1982 are 28 oz external balance. The only exception is the 63-67 289 Hipo which was custom balanced.------------------
Alex Denysenko
Co-Administrator and Moderator NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00,'01,'02,&'03
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"
www.moneymakerracing.com
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kewljay223
Gearhead Posts: 363
From: Long Beach, California
Registered: Sep 2002
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posted 03-28-2003 10:51 AM
quote:
Originally posted by Moneymaker:
All SBF's built before 1982 are 28 oz external balance. The only exception is the 63-67 289 Hipo which was custom balanced.
thanks. that sure clears things up
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