Cam Decision ?

Energy One
FrankBDPS

FrankBDPS

Well-Known Member
From what I have read the 107 was assembled by S&S and delivered to Big Dog ready to install. The rocker boxes should be S&S and be ok. You are correct in pointing out that there is extra stress placed on valve train components due to high lift cams ans stronger valve springs. They are true hot rod engines and do require extra maintenance. They are not for everyone.
 
john sachs

john sachs

Well-Known Member
The 4" bore S&S engines for the chopper companies were sold assembeled from S&S and used S&S rocker boxes.
The .600" cam is NOT a valve pounder, as far as cams go. It's easy on the valve train. (Harley uses a lot of cams in the .575"- .650 lift range).
Use S&S premium lifters when replacment is needed.
John
 
Bowhunter

Bowhunter

Well-Known Member
I too am thankful to have John with his knowledge and skills on this forum. When I need head work, he will get the call.
 
Ray

Ray

Well-Known Member
I guess this is an old guy thing,, I have been thinking about this cam thing a long time now. even thought about changing the exhaust from the original stock ones. If I don't do this in the first day or so, I get to reasoning I am wasting time and money. The more I think about it the more I changed my feeble mind at this point. I took it out Saturday , it is still rattling windows loud with the stock exhaust,,, vance and hines don't make 2-2 big radius to fit it anyway any more. I am going to get those springs checked and possibly the S&S rocker boxes to get rid of that rattle and just ride it.. I am catching up with Raywood almost ,,, almost 8,000 miles .... And covered up in the garage. Thank you all for your input on this,,,


Ray :)


This helped me a lot ,,,


The 4" bore S&S engines for the chopper companies were sold assembeled from S&S and used S&S rocker boxes.
The .600" cam is NOT a valve pounder, as far as cams go. It's easy on the valve train. (Harley uses a lot of cams in the .575"- .650 lift range).
Use S&S premium lifters when replacment is needed.
John
 
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