hey wassupz i just wanna know what's better, having running open headers or have a full apexi n1 catback exhaust..

this is what i think,
stock < open header
open header < apexi n1 catback
stock < apexi n1 catback


anyone??

 

well if your gonna be drivin this thing on the road i would suggest the n1. i dont think the cops would like the open header to much

 

yeah.. but i mean for like performance wise.. anyone????

 

Are you talking street use, Go for the N1. If you are talking the racetrack, Go for the N1. A little back pressure won't hurt. The noise coming from an open header sounds horrible anyways. The only way I wouldn't run an exhaust is a Turbo racecar (track only). Check your local laws and racetrack for info.

 

yeah i have my n1 for daily driven, for track use... would i benifit more in and full apexi n1 exhaust or open headers? noise wouldn't matter at all at the track

 

Track, i would go N1 cos you need some sort of a little back pressure? Correct me if i'm wrong?

 

infact, read this article -

http://www.nsxprime.com/FAQ/Mi...y.htm

 

run open header at the track. there is a reason the all motor cars dont run exhaust. I've found in my own experience at the track, my ET's have always been better with no exhaust rather than 2.25 mandrel or 2.5" mandrel on a variety of setups i've had. Sure, it kills a little exhaust velocity at lower rpms, but at high rpms, you just need to let the engine breathe. a properly designed header is all you need for exhaust scavenging. and remember kids, back pressure is always bad.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91civicDXdude &raquo;</TD></TR><TR><TD CLASS="quote">a properly designed header is all you need for exhaust scavenging. and remember kids, back pressure is always bad.</TD></TR></TABLE>
Backpressure is 100% needed for any engine to achieve blowdown and complete scavenging. if the pipe is too big (diameter) or short there will be no pressure wave that goes back into the cylinder at the end of the scavenging/overlap period to effectivley balance the cylinder.

there is a certain point where too little backpressure will cause a large power loss, not to mention a possibility of burning valves because the searing hot exhaust gasses cant leave the cylinder fast enough (too much volume, not enough velocity)

so you cannot say backpressure isnt necesary, because without it your engine would scorch valves reguarly not to mention make no useable power. but the first part of your statment is entirley correct. a properly designed header for your specific application will do WONDERS for your car. and an off the shelf header will for the most part not provide that.