mstg007

I have a picture of 3 balancers. The One on the engine I needed to swap was a 4 bolt, from a 1972 302. However, I also have a 68 302 balancer and an 86 302 balancer.

The 68 is a 3 bolts 28oz.
The 86 is a 4 bolts 50oz.
The 72 is a 4 bolts X?oz.

Obziosly, I did hold one in one hand and the other. the 72 feels about the same as the 86.

I just want to make sure, ALSO, that if it is a 50oz balancer, then I will need to make sure that the flywheel is a 50oz as well. Correct?

Um... I know I asked this too. The difference from a 157 28oz and 164 50oz. teeth flex plate, can I still use the same starter and will it work with a 65 C4 transmission?

Thanks again

rmodel65

the weights are not weights like your thinking the 28/50 are counter balance weights. so the weight of the actually balancer is gonna be close.



the 50oz must be used with a 50z flywheel and a 50oz rotating assembly.

the 28oz must be used with a 28oz flywheel and rotating assembly


not all 157 tooth flywheels/flexplates are 28oz

not all 164 tooth flywheels/flexplates are 50 oz


for example 351c motors with fmw transmissions use a 164tooth flexplate that is 20oz balanced. so for people using an AOD tranny they can use that flywheel instead of the 164tooth 50oz flywheel

mstg007

ok... I have a dumb question.
How can you tell what type of crankshaft you have without tearing down the engine?

rmodel65

1982 and up is 50 oz you could pull the oil pan and check the casting date on the crank to make sure


the exterior code will give you the year of the block E2= 82

mstg007

Ok. I need some more advise I have found a shop online and asked, what of these balancers are what weight (20oz or 50oz).

FORD 302 C.I. 8 69 3 Bolt Pulley FOR3021
FORD 302 C.I. 8 68 3 Bolt Pulley; 1968 Only FOR3027
FORD 302 C.I. 8 68-Up FOR3511
FORD 302 C.I. 8 69-73 3 Bolt Pulley; w/Weight on Ring FOR3022
FORD 302 C.I. 8 69-77 3 Bolt Pulley FOR3029
FORD 302 C.I. 8 69-80 4 Bolt Pulley FOR3515 (<-----------------------------This is the one that Looks and matchs mine)
FORD 302 C.I. 8 69-Up 3 Bolt Pulley; w/Weight on Ring; Van FOR3022V
FORD 302 C.I. 8 70-81 4 Bolt Pulley FOR3023
FORD 302 C.I. 8 80-Up 4 Bolt Pulley FOR3024
FORD 302 C.I. 8 80-Up 4 Bolt Pulley; w/ECC Ignition FOR3026A
FORD 302 C.I. 8 81-Up 4 Bolt Pulley FOR3024A
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3025A
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3025B
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3026
FORD 302 C.I. 8 81-Up 3 Bolt Pulley; Reverse Rotation FOR3028
FORD 302 C.I. 8 89-Up 4 Bolt Pulley; w/ECC Ignition FOR3025
FORD 302 C.I. 8 All Serpentine Belt; 5.0 Engine FOR5.0

http://www.damperdoctor.com/Merchant...egory_Code=FOR

kalli

i believe the only thing missing here is what engine is it supposed to go on. what are you looking for?

mstg007

The engine it is suppose to be on is a 1972 302. The Flywheel as I know, is a 20oz 157 teeth.

the reason, I am asking, the guy who i recieved the engine from did not give me a flywheel for it. So I was tracking that down to see what type I needed. And then I noticed it was a 4 bolt balancer. The 68 302 I have has a 3 bolt balancer, and it is lighter (seems lighter) than the 4 bolt balancer from the 1972 engine. (The guy took out the engine and had no problems with it, and said it ran like a champ.) He just did not give me the fly wheel. So, Hopefully when I install it, it will not vibrate like crazy. (<----- thats the reason I am asking).

kalli

first a few clarifications:

as mentioned above: from the weight of a balancer you will _never_ be able to check for that 28/50oz imbalance. maybe only then when you have the same make and model just with different imabalnce and a proper weighing scale

The weight has nothing to do with how much the flywheel or balancer weighs. We are talking about imbalance. When you get your tires balanced you want to have them zero imbalance, so that the don't 'virbrate'. with some engines it's the other way around. They have to be imbalanced by 28oz or 50oz (never heard of 20oz) so that the whole thing (balancer, crank, flywheel) rotates without vibrating.

if your engine is a 1972 Ford 302, my best bet would be that you have to have a 4 bolt 28oz imbalance balancer.

unfortunately it's not possible to determine by just looking at them :-(

if you pulled the balancer from a 72 302 then it's very likely to be 28oz imbalance and 4bolt.

that any help ?


Kalli

rmodel65

as ive stated before tha actual weight is not 280z or 50 oz that it the weight of the counter balance. not the balancer think about it like this a wheel weight on your car


a steel rim with no weight on it will be zero balance as wheel an alum wheel wit no weights but they are both zero balance


now if you add a 28 oz weight on the steel wheel it will be 28 oz balanced

and say you add the 50oz weight to the alum rim its still gonna be lighter than the steel rim and 28oz weight but the rotating force with the weight installed will be more

these are 50oz balncers\/


FORD 302 C.I. 8 81-Up 4 Bolt Pulley FOR3024A
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3025A
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3025B
FORD 302 C.I. 8 81-Up 4 Bolt Pulley; w/ECC Ignition FOR3026
FORD 302 C.I. 8 81-Up 3 Bolt Pulley; Reverse Rotation FOR3028
FORD 302 C.I. 8 89-Up 4 Bolt Pulley; w/ECC Ignition FOR3025
FORD 302 C.I. 8 All Serpentine Belt; 5.0 Engine FOR5.0

mstg007

NOW !!!!

lol - That makes sense. I am sorry for the confussion. I thought they were all weighted together.

If they work life you said above, Just ask long as they are made for a 20oz crankshaft, I should be fine no matter what they look like or what bolt they are.

Thanks man!