An Old Timer once told me...

mullinax95 said

Do you think the flow numbers are a fib?
I do remember him telling me that back cutting the valves will make a significant rise in flow. So do you think that back cutting is capable of producing 30 cfm of flow? I mean what does a stock 302 head flow anyways... 174 cfm?

What do you mean "fix the ratio"?

Click to expand...

I dont know.. I would have to test them myself or see an outside test result before I would say that.

I have heard people advertise up to 20 cfm with their 'special' valve job, but I dont know...I dont do valve jobs.

They sound like they might be lightly blended, as in just the area below the seat smoothed left over factory throat cut angles.

when I look at stan weiss head flow chart and see 302's flowing into the 190's w/ 160 cc port volumes...I have to scratch my head sum because the stock 302's I HAVE measured 124cc...and flow in the 160-170's, if I remember right. In fact...it took bowl/ssr/roof work to get it to 200 on a factory VJ & valve.

Tomorrow I will put one on and check it to be sure, but remember Im talking stock on a factory pos valve job, they could flow whatever diff depending on the type of valve job/angles done by this or that guy.