does anyone know the mechanical dimensions of the 3764318 balancer for 270 h.p. motors? there are 2 stepped diameters. specifically,what are the diameters and how wide is each step?.
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Re: C1 HIGH HORSEPOWER BALANCER
sorry, i did't think the first post went through. -
Re: C1 HIGH HORSEPOWER BALANCER
My balancer (which is a Goat Hill repo) measures 6.05" dia on the outermost step next to the radiator and 5.05" dia. on the innermost step next to the engine. These measurements were taken from a pi tape. Incidently, both steps are milled from one piece of metal. The widths are 3/4" (outer) and 1/2" (inner). This stepped outer piece rides on a rubber isolator ring and mates with the center piece that's keyed to the crankshaft. The surface to which the pulley is bolted rides about 1/8" ahead of the outer stepped ring (toward the radiator)
And....I have no idea as to how these dimensions compare with an original balancer. Hope this is clear.....Good luck!Comment
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Re: C1 HIGH HORSEPOWER BALANCER
James
Brad is right on. I took some measurements off of my 57 Duntov 270b balancer, which was, 6", 5", 3/4", & 1/2", per Brads figures. In addition the generator pulley on the 270 is 3 5/8" in diameter, and 3/4" wide, deep grove (3/4" wide at the top). The belt rides deep in the generator and the top of the belt is approximately 3/8 below the lip of the pulley. As best as I could tell the belt is GM part # 3738487. It was difficult to see the numbers as they are pressed into the belt and not painted on. You might want to contact some well known restorers of C-1's, they might put you onto the parts you need.Comment
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The ONLY Goat Hill repro that I have ever
seen was 6 1/2" OD and with holes drilled throughout the outer ring, something that blueprint warns against doing. Are you telling me that he has improved his repop or is carving them from a different donor? The 6.05" OD sounds right on - now, where did I put that blueprint?Comment
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57, 58 & 59-61 HP balancers are different *NM*
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Re: 57, 58 & 59-61 HP balancers are different
loren, yes, i believe they are different. to clarify , my question is related to 1959 270 h.p. judging from earlier posts and checking with outfits like paragon, the repro seems to have holes around the outside ring and 3 spokes in the center. this is unlike the picture and description in the judging manual.Comment
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Re: 57, 58 & 59-61 HP balancers are different
Can anyone post a photo of a 59-61 balancer used on high horsepower 283 engines?
There is a one sided photo in the Paragon catalog of such a balancer but not sure if it is correct. I have a couple of balancers that look like the one pictured in the Paragon catalog which came off, in one case, a 65 283 chevelle wagon. A picture would be a real help.
Thanks
JoeComment
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Re: 57, 58 & 59-61 HP balancers are different
Joe,
I basically ask the same question earlier this last month, as I wanted to "See" what a correct balancer looked like. You can find the posts in the archives.
I was directed to look in the 58-60 Judging manual and I would see a picture of the high horsepower balancer. To my dismay my OLD JM did not have the picture so I ordered a new one.
Not trying to sound like a smart a-- but If you want to see what they look like, the newer JM 58-60 will show you. This is where I found the picture I wanted to see. I hope that you already have a copy of the latest judging manual.
TonyComment
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Re: 57, 58 & 59-61 HP balancers are different
Thanks Tony,
I am surprised that with all the neat photos of obscure items, someone would have a shot of a balancer. Oh well.
Went through all the archives available before the request. The recent discussion and verbal description of the balancer created more questions in my mind that a photo would resolve. Especially between the paragon repro catalog photo and the, 'close but no cigar' 65/ 283 chevelle balancer I have for my 61.
JoeComment
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Re: 57, 58 & 59-61 HP balancers are different
I'm not very good at sending pictures but here is a valiant attempt! It may be too big, but here goes.....
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Re: 57, 58 & 59-61 HP balancers are different
Here another attempt.....It is too big and I've got to figure out how to reduce it. It's also fuzzy but you can kinda tell what it looks like. I WILL get better at sending photos!
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Re: 57, 58 & 59-61 HP balancers are different
This one's is clearer....still haven't figured out how to shrink it! Anyone have suggestions?
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Re: 57, 58 & 59-61 HP balancers are different
Super!
Thanks Brad!
So the stepped portion is one piece with the rubber ring seperating a spoked center piece. I wonder if the spoked center piece is common to the 283 chevy balancer and the vette balancer in your photo?
JoeComment
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Re: 57, 58 & 59-61 HP balancers are different
Joe,
I wasn't clear on the construction of my center piece. It is solid....with out spokes. I agree that the JG is incorrect, showing a spoked hub.
BradComment
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