Are there flow numbers out there for a 194 head with stock valves and lumps?
Trying to glean what I can from different places as to increase percentages that might be gained by adding lumps. I've read around 10% to 15%. That could move the 194 to a possible 187 to 196 cfm without any other work. Tom got about 24% on an open chamber head with 1.84" intakes, lumps, and porting. This is at .50" lift.
According to Tom's site the stock open port head flows 168.5 cam at .500 lift/
With 1.84 intakes and the boss removed flow is 195.6 cam.
With lumps installed 215.6 cam.
On another site Tom said the stock 194 head would flow about 170 cfm. This makes sense to me because at the beginning the 1.74 valves are not as shrouded as they become with larger valves, It also makes sense that there would be some gain by installing lumps in the 194 head with stock valves and that if that gain covers the rpm range where the engine will be used a cheap high compression low rpm would result.
