flathead alt conversion belt help
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Laughing Gas
Joined: Aug 2006
Posts: 815
Likes: 4
From: mountaintop, Pa
flathead alt conversion belt help
I'm having trouble finding a replacement belt for my 239 flatty. I found a replacement belt but I need one about 2" min. Where are you getting you belts? I have the real fat ones.
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Laughing Gas
Joined: Aug 2006
Posts: 815
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From: mountaintop, Pa
correct. on both accounts.
What I'm saying is my alt belt no longer fits the engine it's to small by a lot. I'll have to triple check how it's mounted again. Could the alt be upside down? I';ll check the folks who manufactured the bracket/ Lastly I just realized I may be able to cut down the bracket to give me more movement.
bob
Fleet Owner
Joined: Jul 2004
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From: NM
Good info Pete!
Bob, the alternator should be in the same location as the generator was, and with the same size pulley, I would expect the stock belt to work. Got a pic of the setup? I assume it's the slingshot style?
Bob, the alternator should be in the same location as the generator was, and with the same size pulley, I would expect the stock belt to work. Got a pic of the setup? I assume it's the slingshot style?
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Laughing Gas
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From: mountaintop, Pa
Pete thanks for the #'s
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Laughing Gas
Joined: Aug 2006
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From: mountaintop, Pa
Ross, I'll post up later if I can. (honey-do projects) It is a slingshot style is that yours in the pick may I ask the dimensions of it ? at least the bottom section.
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Laughing Gas
Joined: Aug 2006
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From: mountaintop, Pa
nope either way alt measure the same distance. does any one have a measurement on a factory belt? I may have an undersized belt on here. Maybe PO used a different bracket and belt??
36" and 56" listed on napa
The outside measurement of my alt belt is 54 1/4" That may be the issue...
36" and 56" listed on napa
The outside measurement of my alt belt is 54 1/4" That may be the issue...
Posting Guru
Joined: Mar 2008
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you can use a fabric tape to get you number. run tape around all pulleys. as a wide belt should never bottom out on pulleys, don't pull tape tight. just snug in center of pulleys. if adjustment is at lowest point, add 1 inch to number and this should work.
Fleet Owner
Joined: Jul 2004
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From: NM
The 36" is for the L6. Gates lists the stock belt length as 55.5" outside length, 55" effective length. The belt shown in my picture above is a 53.5", so the alt must mount a little lower. Not entirely sure if that is a wide belt or narrow, tho.
What kind of alternator is that?
What kind of alternator is that?
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Laughing Gas
Joined: Aug 2006
Posts: 815
Likes: 4
From: mountaintop, Pa
delco 78amp it's marked "good" so it must be 
it looks like I have a little more room but the bracket is bottoming out on the engine. As a last resort I could lop off the bottom of the bracket???
bob
it looks like I have a little more room but the bracket is bottoming out on the engine. As a last resort I could lop off the bottom of the bracket???
bob