Small Block Head Flow Chart

Actually, the SF-110 was very user friendly IMO.
I did countless tests on that thing.

The thing I found with a small bench not being able to generate high pressures with the big heads was not so much that it couldn’t get the head to go turbulent if the shape was wrong...... it was that it didn’t reveal the gains that you could get out of increased “area”.
Shape was everything......area, not so much.

I really struggled with keeping the Indy 440-1 heads from getting unhappy at high lifts.
When I got the bigger bench and could pull the full 28”....... that problem, for the most part, just went away.

I had both benches for a while.
In a nutshell, on the new bench(compared to the old)...... small heads showed lower numbers, big heads showed higher numbers.

But..... that’s all drifting away from the thread topic.

That is what i am so looking forward with my new bench. Turning the bench down to 10", for above .300 lift, was surely hiding some turbulence.
Looking forward using my flow bench. but with the move into a new home and state, building a shop out back, and my new job........I think it will be another year before i can warm, do a final calibration, and get at it again.:(



I like reading old stuff like that.
3 inches of vac and 87 CFM
What i found the most interesting was that the cfm laying over at .500" and .600", with the larger valve.
Even though it may have hidden some unseen hidden turbulence, the "air back up" was at the same lift.........Interesting.