Compression ratio vs Porting

NO!

If having more airflow hurts power it's because more fuel wasn't added with it. Too much airflow is like too much oral sex... A great problem to have that none of us are likely to experience.

Remember, an engine is an air pump. Fuel + air go in, torque comes out. Nothing more, nothing less.

More air flow whether from headers, heads, cam, intake etc.. The carb will automatically add more fuel might need to be setup so not to run rich or lean.

Everyone takes things to extremes I'm not saying run W9's on a semi warm/hot 318, I'm talking fully ported 2.02 valve 318 heads or 340/360 or even EQ may or may not lose some bottom end cause of velocity.


I know this is taking this subject of target a little BUT.......

C130 chief, i have to disagree.


My first sets of head that i ever ported, had more air flow, had the fuel to support it, and became a DOG on bottom end.

although i had a lot more cfm then before, i totally DESTROY the bottom end.

Did it make more Power! YOU BET, by a couple mile per hour at the end of the 1/4.

Did it run faster? NO! A full sec Slower!!! Why? Because even though it would rev 1000 rpm higher now.(6800+) it would not get out of its on way! It was dead for the first 60 to 100 foot of the track..........then...... it took off like i hit it with a shot of nos!

A eng is a air pump..........and so much more then that. I had such bad exh reversion, the the intake manifold was black all the way up to the carb base.

And that was with a 9.4 compression 340 .474/280 MP cam.

Yes more air/fuel will make more power, IF the port is not to large(read air too slow or weak velocity) and the exh doesn't have reversion or exh reverting to the intake.