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11-26-2002, 11:22 PM | #1 |
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Flywheel question
Will I be able to use a '91 flywheel from a '91 5.0 on a '74 351w or will I need a different harmonic balancer?
I think the weights are different after 1982 but I'm not sure. I want to be positive so I don't shake my engine apart.
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'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. |
11-27-2002, 08:25 AM | #2 |
347ci of HORSE POWER!!!
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Location: Houston, TX
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I'm not sure what the numbers are for the blancing but I do know this. Whatever your crank is machined for, you have to have the same weighted harmonic blancer and flywheel. My motor is machined balanced for a 28.2 oz crank. So I had to get a 28.2 oz flywheel and harmonic blanancer. Hope this helps ya out!
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11-27-2002, 08:34 AM | #3 |
or '331 LX Eric'
Join Date: Jan 1999
Location: Columbus, Ohio
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FWIW - if you purchase an aftermarket flywheel (like my Fidanza aluminum fly) they come with three different counter weights (50oz, 28oz, 0oz) so that you can easliy match it to your application.
E
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1991 5.0 LX Coupe - 40,750 miles 331 cu. in. / Tremec 3550 / BFG Drag Radials 12.22 @ 114.31 mph - w/1.89 60' |
11-28-2002, 01:00 AM | #4 |
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Your best bet would be to get a new flywheel. While it is possible to get a matching balancer for your flywheel, it wouldn't have the timing mark in the correct location.
Take care, ~Chris
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11-28-2002, 10:34 PM | #5 |
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I could do that but I still don't know weight balancer I have on my '74 351w. I wouldn't know what flywheel to buy.
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'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. |
11-29-2002, 01:29 AM | #6 |
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All 351W use an imbalance of 28 ounces. Make sure your new flywheel is for a 351, and not a 302. The 351 has 164 teeth, and the 302 has 157.
Take care, ~Chris
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11-29-2002, 07:37 AM | #7 | |
347ci of HORSE POWER!!!
Join Date: Jul 2001
Location: Houston, TX
Posts: 1,416
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Quote:
Isn't the balancer keyed so that it can only go on ONE way? That's the way mine is. So wouldn't the timing marks will be the same?.... |
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11-29-2002, 09:12 AM | #8 | |
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Quote:
Take care, ~Chris
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11-29-2002, 03:14 PM | #9 | |
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Quote:
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'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. |
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11-29-2002, 03:16 PM | #10 |
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What years(s) did Ford use the 0 and 50oz flywheels?
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'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. |
11-29-2002, 05:06 PM | #11 |
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Ford never used a zero weight for the small blocks. All 5.0's through 1979, and all 351W's use the 28 ounce flywheel and balancer. All 5.0's from 1982 on used a 50 ounce flywheel, and a 34 ounce balancer (but everyone refers to that as a 50 ounce balancer so that people don't get confused. ). However, the size of many of the 351W and 5.0 28 ounce flywheels were different.
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