What size harmonic balancer?
Thread Starter
Drifting
Joined: Apr 2005
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From: I KNOW JESUS... HE'S MY GARDENER
What size harmonic balancer?
I'm about to order a degreed timing tape for my harmonic balancer. Does anyone know what size (diameter) balancer is on a stock 74 350? I tried to measure, but too much stuff in the way.
Le Mans Master
Joined: Mar 2004
Posts: 7,470
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From: Little Rock AR
L-82 has the bigger 8" balancer. The L-48 has the 6-3/4" balancer. Hope that helps.
You can actualy do a pretty good job degreeing it using a tape measure but if you buy a timing tape, you still need to get it on the balancer. The timing tape will fly off and get destroyed rather quickly so once you get it on there, mark a few places with a sharpie in strategic places such as every 90 degrees and again at 36 degrees BTDC for setting the timing. That way you will have some reference that will stay on there.
Just a thought.
-Mark.
You can actualy do a pretty good job degreeing it using a tape measure but if you buy a timing tape, you still need to get it on the balancer. The timing tape will fly off and get destroyed rather quickly so once you get it on there, mark a few places with a sharpie in strategic places such as every 90 degrees and again at 36 degrees BTDC for setting the timing. That way you will have some reference that will stay on there.
Just a thought. -Mark.
Thread Starter
Drifting
Joined: Apr 2005
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From: I KNOW JESUS... HE'S MY GARDENER
Originally Posted by stingr69
You can actualy do a pretty good job degreeing it using a tape measure...
My motor is the L-48, but the balancer looks bigger than 6 3/4". Subsequent research in the mail-order catalogs indicate 8". If I measure the circumference, what formula do I use to calcualate the diameter?
Le Mans Master
Joined: Mar 2004
Posts: 7,470
Likes: 1,492
From: Little Rock AR
If you measure around the balancer, 1/10th of the distance around it will be 36 degrees. 1/4, 1/2, 3/4 of the way around is every 90 degrees. You can use a cloth measuring tape or even a piece of string.
As an example: if the balancer is 25 inches around, 2.5" to the right of the tdc mark on the balancer is 36 degrees before TDC.
-Mark.
As an example: if the balancer is 25 inches around, 2.5" to the right of the tdc mark on the balancer is 36 degrees before TDC.
-Mark.
Race Director
Joined: Jul 2004
Posts: 12,696
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From: Scottsdale Arizona
Originally Posted by SkunkApe
If I measure the circumference, what formula do I use to calcualate the diameter?
Drifting
Joined: Jan 2002
Posts: 1,645
Likes: 11
From: Schaumburg IL
Originally Posted by Michel B
Here's a trick to keep your timing tape, after installation, spread two thin films of edge sealer. I used 3m edge sealer. 
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Thread Starter
Drifting
Joined: Apr 2005
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From: I KNOW JESUS... HE'S MY GARDENER
[QUOTE=1971corvette]
Because of the crankshaft pulley/belts, I can't get a ruler across the face of the balancer to accurately measure its diameter. I can, however, rotate the engine to clean the balancer and apply the tape.
So, what's easier...Removing the crankshaft pulley or posting a question here?
There's always one...
Originally Posted by SkunkApe
If to much stuff in the way? how do you plan on putting the
tape on the balancer? let alone getting it clean so the tape will stick
tape on the balancer? let alone getting it clean so the tape will stick
Because of the crankshaft pulley/belts, I can't get a ruler across the face of the balancer to accurately measure its diameter. I can, however, rotate the engine to clean the balancer and apply the tape.
So, what's easier...Removing the crankshaft pulley or posting a question here?
There's always one...
Le Mans Master
Joined: Mar 2004
Posts: 7,470
Likes: 1,492
From: Little Rock AR
Originally Posted by SkunkApe
Do you have a link to that procedure? I remember reading something from Lars, but don't remember where.
My motor is the L-48, but the balancer looks bigger than 6 3/4". Subsequent research in the mail-order catalogs indicate 8". If I measure the circumference, what formula do I use to calcualate the diameter?
My motor is the L-48, but the balancer looks bigger than 6 3/4". Subsequent research in the mail-order catalogs indicate 8". If I measure the circumference, what formula do I use to calcualate the diameter?
So I guess circumference divided by 3.14 = diameter (if I got the math right).
-Mark.
Team Owner
Joined: Jul 2001
Posts: 182,997
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From: Lakeland, FL
Cruise-In IV-V-VI-VII-VIII Veteran
St. Jude Donor '03, '06, '17
IMHO, smaller is better for balancers..
Car will accelerate quicker with a lighter balancer.. I use a 6' balancer on my 406...
Car will accelerate quicker with a lighter balancer.. I use a 6' balancer on my 406...
