PORT VOLUME-IS BIGGER BETTER OR IS LARGER LESS? Richard Holdener

33IMP said

Ok, as long as we are hypotheticalizing, how about this....
Two engines built with similar intakes, maybe edelbrock rpm, similar camshafts, maybe 509 purple shaft hydraulics, same compression ratio.
408 small block with 190 trick flows,or....
406 big block (.035 over 400) with 270 trick flows
Which would you rather have, which would be faster?

Click to expand...

The you tube dyno test was very narrow and will show different results on any given combo. The engine masters show showed similar results on a stroker Ford small block. The bigger head performed as good as the smallest head with the middle head showing more torque.

Your two examples are two different animals. The Max Wedge port size of the 270 may indeed show more power but I wouldn’t run it on a 406 B engine. The 240? Oh yea! The 270, ahhhh, No....

What would be the goal of the 408? With the TF head?
What cam? Compression, trans, gear and tire on what weight car? For what purpose?
Bracket racing?
Street stomper?
Heads up 1/4 mile?

3 different aspects are listed. I can argue for 3 different heads on a 408 and not care what the Dyno says it does.
The dyno is a tool and telling you how well it does on what combo that is actually in a car and how well it does as well as the most important item, how the driver likes it for the purpose it is slated for..... or not...