balancer counterweight
Thread Starter
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Senior User
Joined: Dec 2007
Posts: 269
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balancer counterweight
Howdy guys,
As my balancer isn't in a great sape anymore, i want to replace it.
I have a 400 engine.
I also have a 351M engine in the barn, and it has a small different balancer.
What weight do i need?
28 Oz, or 50 Oz?
When i take a look here, it say's that the balancer is for a 351M/400 and they don't make a difference in it.
http://www.professional-products.com/dampersProductSBford.php
What's the problem when i put the wrong weight on it?
Thanks.
ps. original balancer say's: DIAE-AA SD H8
As my balancer isn't in a great sape anymore, i want to replace it.
I have a 400 engine.
I also have a 351M engine in the barn, and it has a small different balancer.
What weight do i need?
28 Oz, or 50 Oz?
When i take a look here, it say's that the balancer is for a 351M/400 and they don't make a difference in it.
http://www.professional-products.com/dampersProductSBford.php
What's the problem when i put the wrong weight on it?
Thanks.
ps. original balancer say's: DIAE-AA SD H8
Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
could be out of balance. I have a 351m and convert to 400 and don't know the difference between the 351m and the 400 balancer. I only have a 351m balancer.
You say it's smaller balancer on 351m ?
You say it's smaller balancer on 351m ?
Thread Starter
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Senior User
Joined: Dec 2007
Posts: 269
Likes: 0
Yes.
I have a 351M here in the barn, and it weights less, and is a bit thinner.
From what i've recovered so far, is that the weight is different due to a heavyer crank in the 400, but the balance weight is the same, and should be 28Oz.
Tomorrow i intend to pull the old balancer off, then we'll see...
I have a 351M here in the barn, and it weights less, and is a bit thinner.
From what i've recovered so far, is that the weight is different due to a heavyer crank in the 400, but the balance weight is the same, and should be 28Oz.
Tomorrow i intend to pull the old balancer off, then we'll see...
Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
Laughing Gas
Joined: Jan 2006
Posts: 883
Likes: 7
From: New-brunswick,Canada
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Thread Starter
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Senior User
Joined: Dec 2007
Posts: 269
Likes: 0
you're trying to say:
The 351M uses a different harmonic balancer than the 400 -- It is best to buy a new 400 harmonic balancer to go along with a 400 crankshaft. You can use a 351M balancer, however, you will have to rebalance the 400 crankshaft by adjusting the counter weights to bring the assembly into balance. Also, the timing marks on the 351M balancer will be nearly useless on a 400 crank -- I know because the engine shop used the 351M balancer on my engine. I had to set my timing at 20+ degrees to get the engine properly timed.
The 351M uses a different harmonic balancer than the 400 -- It is best to buy a new 400 harmonic balancer to go along with a 400 crankshaft. You can use a 351M balancer, however, you will have to rebalance the 400 crankshaft by adjusting the counter weights to bring the assembly into balance. Also, the timing marks on the 351M balancer will be nearly useless on a 400 crank -- I know because the engine shop used the 351M balancer on my engine. I had to set my timing at 20+ degrees to get the engine properly timed.
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