I was woundering if any one is running open header. I know that normally running open header you gain alot more hp. over an exhaust.

 

Not going to work well. You will loose all backpressure and we definitely need some.

 

open headers yields better top end at the price of lower end torque...plus it'll sound really ugly to make what, 10 more hp at the wheels if that? don't be that guy, ya know the one with one hell of a bark but can't bite worth a dime

 

I thought that especialy with a f/i car you want free flow with now back pressure. Don't you want all that hot air out as fast as possible.

 

yes but only under wot, under normal throttle load there is a slight but neccessary back pressure. hope that helps. just run what i am a complete 3" exhuast system w/ high flow header

 

well without going into pressure waives and header primary lenght and diameter etc etc the idea is that you want a scavanging effect, which is tuned for a given rpm etc etc... efi or not has nothing to do with it...I'll correct my statment of lossing low end torque by saying you aren't really "loosing" torque (it isn't disapearing) rather, it switches over to a higher rpm, so let say you loose 10ft at 2500 you may gain it back at 5000 (for example).

 

all of you are wrong in my car my cat broke at the flexpipe my car sounded like nascar but i felt faster than ever i moved and never got a CEL

 

How did it sound?

 

I know nascar but a nice sound or crapy sound.

 

it had to be hedious

 

To me the only cars that sound good with open headers are V8s.

 

hmm I'll second that by adding that V8 has do have some lope...stock V8 open headers sounds like poo as well...

 

Open headers are only for drag cars that will never see the street.

 

Wouldn't that burn up your head? Or at least cause great damage to it?

 

and which individual ever told you THAT? lol --probably the same dude that is running a 3/4 race cam-- lol

no, it will lean you out so you have to compensate for that...