[Stan Weiss]

Originally Posted by 25stevem

Maybe I can shed more light on to what may also having a effect on the level of power being made here by the OPs combo .

Way back in 2014 I had the very good fortune to spend about 10 minutes talking to David Vizard about the need for a certain cfm carb to produce a given level of power.

He cited to me a example of 2 BBC motors that both made 1100 hp, give it take 4 to 5 hp.

These 2 motors where both the same cid and used the same cam and the same pistons producing the same compression.

The only difference was the heads and intake manifold used.

So they both where extremely close to being the exact same build.

The main difference was how much fuel per hour each motor needed to make that 1100 hp which ties right in with the needed cfm rating of the carb used.

One BBC needed only 1260 cfm or like 5.2 pounds of fuel per hour, and the other needed 1450 cfm , or 6 pounds of fuel per hour.

These two differences where basically related to the how equal the fuel distribution was per cylinder that the intake manifold used produced, and how good the cylinder heads where in shredding up streams of wet flow ( wet flow management ) back into a burnable useful state.

As happy as I am that we have very useful formulas to get us to base line numbers, many of them assume ideal conditions and not the variations that take place in the real world!

Steve,
This does not make any sense to me. The only thing that I can think of that those number would be close to is BSAC.

This a screen from a program I wrote with David Vizard.

Stan