Very tempting.

I wonder how much 16 of these would be in 40mm sizes? :

http://www.manleyperformance.com/TiVlvWrksht-Horiz.pdf

 

Huh, looks like one of my projects in high school CAD.

Ohhhh, I am in no condition to use the internet right now...

purple monkey

 

Brendan
Further on in their catalog I seem to remember that the Briggs & stratton valves are the closest/same size as the S4, just need a custom one with a longer stem.

 

Have you asked them to give you a price quote? Would be interesting to see the $$ for large, custom intake valves.

 

Gonna Do that probably today.

 

Any progress?

 

Not yet. I have thier print out and I was going to fill it in with the suggested values from A. Graham Bell's book "Four Stroke performance tuning" but I have read and reread that chapter a few times and am having trouble with the angles.

I'll resurect this thread when I get word from them.