Don,
As I have put on another thread, I am considering some top end work. You mentioned that you did NOT want compression release. I understand what they do, but not sure of pro and cons of this item. Not really interested in "super" compression based engine, would like to stay at around 10 but I am intersted in your opinion on "to release or not to release" that is the question? thanks john
John, my thinking involved a few things. First is that generally I just didn't want to screw with them (compression releases).
Building an engine big enough to need them is a temptation to build an engine bigger than I need or want and an engine big enough to commonly have other reliability questions down the road.
I don't want to regularly burn my damn fingers.
I wanted to use the cylinder head bridges to fill that space around the plugs. At least not without further machining of the bridges you can't do that with compression releases.
I didn't want to forget to use the damn thing sometimes.
I didn't need nor want a motor that required them.
I wanted simple, reliable, easy, efficient maximization of the basic platform I had. That was the guidance I gave Zippers (repeatedly). That could be done without the need for compression releases.
That there were other issues with the work is separate and apart from the original intent. Too many sets of compression releases are installed for show purposes anyway. I just didn't want to screw with them.