Re: Externally balanced 440 and aftermarket flywheel
[Re: Commando1]
#515758
11/04/09 08:23 AM
11/04/09 08:23 AM
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Joined: Jan 2003
Posts: 13,417 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
Joined: Jan 2003
Posts: 13,417
Marion, South Carolina [><]
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1970-1972 HP 440's were externally balanced. They all had 6 pack rods, even the 4 barrel versions. If I am not mistaken, the '69 1/2 6 pack motors were internally balanced b/c they had LY rods. Doesn't matter if the crank is steel or cast, if it has 6 pack rods then it's externally balanced.
Just went through this on my dad's road runner. I had the rotating assembly internally balanced, it was a 1971 HP 440 w/ 6 pack rods (external balanced motor). Makes changing flywheels later on down the road much easier. CHIP
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Externally balanced 440 and aftermarket flywheel
[Re: Dodgeballs]
#515759
11/04/09 02:06 PM
11/04/09 02:06 PM
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Joined: Jun 2004
Posts: 469 Hawaii
Dodgeballs
OP
mopar
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OP
mopar
Joined: Jun 2004
Posts: 469
Hawaii
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Thanks for the responses.
So am I screwed?
Can only the original flywheel for the motor be used (which I don't have because my motor had an auto trans originally) unless I pull the rotating assembly and get it all rebalanced?
Last edited by Dodgeballs; 11/04/09 03:04 PM.
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Re: Externally balanced 440 and aftermarket flywheel
[Re: Dodgeballs]
#515760
11/04/09 04:49 PM
11/04/09 04:49 PM
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Joined: Dec 2006
Posts: 3,533 Indiana
Fury Fan
master
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master
Joined: Dec 2006
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Indiana
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You might be screwed eventually, but not yet. Old trick is to install the neutral flywheel, then weld the appropriate weight onto teh pressureplate housing. I've never had to do it, but I've heard of doing it. You'll have to research that one further. The old-school reports were that all steel cranks were drilled for a manual trans, but I've heard of enough exceptions over the years that I would verify mine before trying to throw a trans in the car. If yours isn't drilled, Napa has a 'conversion' bearing that fits into the outer section of the crank hub. You'll have to research that one too.
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Re: Externally balanced 440 and aftermarket flywheel
[Re: Fury Fan]
#515762
11/04/09 05:12 PM
11/04/09 05:12 PM
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Joined: Jan 2003
Posts: 13,417 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,417
Marion, South Carolina [><]
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As far as I know, the only way to balance the flywheel for this application is to have the rotating assembly out of the motor. Like Fury Fan said, I have heard of welding weights to the pressure plate. That would be a pain b/c when it comes time for a new clutch and pressure plate, you'll be doing it over again. In the long run I think you'll be better off internally balancing the motor. I know that's a pain for you with your motor running good and all. There is a roller pilot bearing for cranks that never had a pilot bushing installed. That's what I used on my dad's car. I had a friend get me one through Mopar Performance. Sorry, I dont remember the part number for it. With all the '70 and up 440 HP motors that had 4 speeds behind them, you'd think an externally balanced flywheel would be easy to come by. CHIP edit...I think John Kunkel just saved the day, lol. Hope that works for ya!!
Last edited by a9sec70cuda; 11/04/09 05:35 PM.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Externally balanced 440 and aftermarket flywheel
[Re: Dodgeballs]
#515766
11/05/09 09:48 AM
11/05/09 09:48 AM
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Joined: Jan 2003
Posts: 75,126 A Banana Republic near you.
JohnRR
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I Win
Joined: Jan 2003
Posts: 75,126
A Banana Republic near you.
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Quote:
Thank you John!
I assume that this procedure is for the 11" neutral balance flywheel?
Thanks again.
Yes that procedure will work for both the 130 tooth or 143 tooth wheel .
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Re: Externally balanced 440 and aftermarket flywheel
[Re: an8sec70cuda]
#515768
11/06/09 12:26 AM
11/06/09 12:26 AM
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Joined: Oct 2003
Posts: 1,183 eganville ont
440beep
super stock
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super stock
Joined: Oct 2003
Posts: 1,183
eganville ont
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Quote:
1970-1972 HP 440's were externally balanced. They all had 6 pack rods, even the 4 barrel versions. If I am not mistaken, the '69 1/2 6 pack motors were internally balanced b/c they had LY rods. Doesn't matter if the crank is steel or cast, if it has 6 pack rods then it's externally balanced.
Just went through this on my dad's road runner. I had the rotating assembly internally balanced, it was a 1971 HP 440 w/ 6 pack rods (external balanced motor). Makes changing flywheels later on down the road much easier. CHIP
1972 440 hp is not externally balanced
is internally balanced and has 6 pack rods
1970 -71 440hp are externally balanced
Last edited by plymouth birdman; 11/06/09 12:45 AM.
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71 gtx 440 4speed air grabber blue on blue with white vinyl roof
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