Short headers or long headers

[pmajka]

I need to make a decision..

most of the headers i see on cars are long about 2' or more of tubing.

However didnt the 993 have really short headers


what are the pros and cons of Short vs Long headers?

[Bill Verburg]

Short and/or wide tend to move the power band up, long and/or narrow tend to move the power band down.

Of course the cams and configuration of the rest of the engine are intimately interdependant w/ the exhaust.

[pmajka]

So short would require me to run Higher rpms to make the same/greater HP?

[Bill Verburg]

So short would require me to run Higher rpms to make the same/greater HP?

There would be a tendancy toward that, but again the headers are interactive w/ the heads, cams, valves, intake and mufflers.