Right agree...point being, it's like having two motors. Street car with open chambers on race day change heads and intake and drop a second or two.KnightEngines wrote: ↑Thu May 02, 2019 10:13 am Best to get a piston to match the chamber or you'll have a funky shaped combustion space when the plug fires, which will give slow & uneven flame front.
It may be no big deal, or it may be a lazy ass innefecient burning pig, I dunno. But I do know there is pretty decent gains to be had by getting the combustion space closer to ideal.
With that cam I'd be happy with 9.5:1
I'm hoping to talk to someone that did this already.
I have the parts off the engine when I bought it, idk if the builder kept an eye on things, the conn bearings were worn to the copper on the uppers and the main bearings had a bunch of scratches. I bought a crank and rods, had the block done so I am hoping I can build something to get couple thousand miles out of it. If I get 50,000 miles out of my first lower engine build...I'll feel good.
