I am about to buy a Tuned Port Injection system for my firebird. I am not sure if it is Speed Density or Mass Air. My question is, which is better to have for a high performance engine? I am going to buy the Holley 950 Commander, and I believe that it will adapt to either one. How hard is it to change a system over to the other? Is it as simple as changing a sensor and a throttle body, or is their a lot more to it? The 950 Commander can be programed to whatever I want. Thanks for any info or suggestions.

 

not a single person out of 16 knows the difference between the two?

 

A simple search would have answered ya questions mate

here's a good link

https://www.thirdgen.org/forums/tpi/...d+mass+density

for more info just type in speed density and mass flow into the search engine

 

Or in the "banned topics" thread

 

Holy attitude!