Another Knucklehead Build

[mayhugh1]

Hi Terry
Designing a cam is way beyond my capabilities.
I will have to study all the drawings and come up with something? to guide me.
At the end of the day it will be used more for display at exhibitions than for running.
Still thank you all the same.
Graham

Graham,
You're welcome to use the one I designed. There should be enough information in my build thread to duplicate and install it. You can use the same pin mounting scheme described in the original drawings to affix the lobes if you wish. My cam will reverse the engine's direction of rotation, however, and this will require the oil pump's input and output to be swapped. - Terry

 

[GRAYHIL]

Thank you very much for your suggestion.
I will find the relevant pages and see if I can incorporate them.
Graham

 

[GRAYHIL]

Hi All
On the head drawings ref the position of the .25" valve holes , one is at .330" and the other is at .339" is this difference critical?
Graham

 

[mayhugh1]

Hi All
On the head drawings ref the position of the .25" valve holes , one is at .330" and the other is at .339" is this difference critical?
Graham

You should be able to work with that...

 

[GRAYHIL]

Mayhugh1
I can work with that, perhaps I did not express myself clearly. I was asking
why ?
Graham

 

[mayhugh1]

I'm not sure why the original designer made them slightly different you might email him. Do you have any photos of your progress so far?