ImportGuy
Quote " He was and is against even measuring the static compression ratio" This is absurd. If your building a street engine you have to define a livable compression ratio of, for example, 10 to 1. Same for a race engine. If you want 14 to 1, this must be determined before hand. Cam selection is critical as the intake and exhaust opening and closing events before and after top dead center determine cylinder pressure. I remember reading an article, maybe 20 years ago, on the soft head. My thoughts about it then was nonsense, nothing has changed. He was describing a cylinder head with an intake valve perpendicular to the piston and a very small exhaust valve in the middle of a trough opposite the intake valve. Now, there were your spark plugs, one at either end of the trough. I can't imagine two flame fronts propagated at either end of the trough meeting in the center. Can you? He was also talking about incredible cam dynamics and valve motion requiring multi lobes on the intake side for different velocities concerning the opening and closing events of the intake valve. He was also claiming air fuel ratios of 18 to 1 and very little ignition advance! " He ran 25 to 1 compression ratios with no problems on pump gas" I thought he was against measuring static compression? That compression ratio along with the cam with little or no overlap, as he prescribed, would create cylinder pressures in excess of 300 PSI. Does anyone produce this head? I would like to look at it, touch it. "I don't know of anyone else that has caused as many rules to be changed in NASCAR" He didn't have a thing to do with that rule change. At the time they were running 18 to 1 compression ratio and more. Engines were blowing, leaving
oil and debris on the track. To dangerous. The ruls board noted this and made the 12 to 1 change. If you could let me know what the technology was that trickled in from the design of his soft head and any other rules he had changed in NASCAR I would be delighted to know. Also, any independent tests run by SAE (Society of Automotive Engineers) or any other group that you know of, I would enjoy reading their findings.A continued conversation would be enjoyable.
Thank you;
Lyman