Inliners International Forums General Discussion Engines Need Help with 292 rebuild project

Hi Lee, Am in total agreement and you are absolutely correct. The intake port obstruction is the bottleneck on this air pump,and the lumps provide the velocity as well as the smaller valves unshrouding the chamber. One example where bigger is not better. Would be interesting to get a valve size/air flow efficiency percentage.BTW, Jesus is my Saviour also.