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Forums->Hot Heads Tech Talk->Desoto cam

gullwing
Desoto cam


I am building a 345 Desoto. After being just a pile of parts for years I just got my engine back from the machine shop. Doing the assembly I have run into a problem with the timing chain sprocket on the cam. I am using a Hot Heads cover and chain. The sprocket is way too big. So what have I done wrong? Did I buy the wrong timing sprocket? Did I install the wrong camshaft? Is there a shim or adapter that I can use?
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on: Fri 23 of Jun, 2017 [20:57 UTC] reads: 2735

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Re: Desoto cam
on: Wed 05 of Jul, 2017 [21:44 UTC] score: 0.00
> I am building a 345 Desoto. After being just a pile of parts for years I just got my engine back from the machine shop. Doing the assembly I have run into a problem with the timing chain sprocket on the cam. I am using a Hot Heads cover and chain. The sprocket is way too big. So what have I done wrong? Did I buy the wrong timing sprocket? Did I install the wrong camshaft? Is there a shim or adapter that I can use?


Gullwing:
Your cam snout is your trouble. It should be more like 1.0615". If it's a short deck cam that has been shortened, etc. be glad you found it now. Good luck, Bob

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gullwing
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Re: Desoto cam
on: Tue 04 of Jul, 2017 [03:44 UTC] score: 0.00
sorted the problem out. The camshaft in question was a low deck (long snout) cam shaft that has had the snout removed to fit the Hot Heads cam cover conversion. The cam is 1" as opposed to the larger 1 1/16" cam diameter for the high deck. Good thing it did not fit. Now though I need to have my correct 341 camshaft reground.

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gullwing
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Re: Desoto cam
on: Fri 30 of Jun, 2017 [00:28 UTC] score: 0.00
> I am building a 345 Desoto. After being just a pile of parts for years I just got my engine back from the machine shop. Doing the assembly I have run into a problem with the timing chain sprocket on the cam. I am using a Hot Heads cover and chain. The sprocket is way too big. So what have I done wrong? Did I buy the wrong timing sprocket? Did I install the wrong camshaft? Is there a shim or adapter that I can use?

Okay, maybe I need to be more specific. My camshaft has a snout that measures 1.012 inches (maybe nominal 1.0") and my timing chain sprocket measures at 1.063" (maybe nominal 1 1/16"). Anyone know why the discrepancy?


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