header and exhaust - Page 2

***zetecDon*** · 01-10-2013, 10:03 PM

Quote:

Originally Posted by darossi3

http://youtu.be/6z9Kku5FPuk FSWerks Full stealth system, Race headers, and flex. Enjoy.

Catless i might add :)

I guess this just answered my question lol. Does it drone really bad cruising at highway speeds? I know when I just had the FS race header with my JBA exhaust it was loud and obnoxious. I was tired of having to wear earplugs so I changed over to the SVT header lol.

***ZXthrizzle05*** · 01-10-2013, 11:48 PM

when I was NA I ran straight pipe svt header and magnaflow exhaust. kinda noisy in the city above 4k rpms but highway speeds and what not the thing had the NICEST little hum to it

thingsidont · 01-11-2013, 01:01 AM

sorry to hijack the thread but what are peoples take on the FC 4-2-1 headers? and does the size difference between 2.25 and 2.5 really make a difference?

focusmaniaczx3 · 01-11-2013, 07:37 AM

post a link to the header you are speaking of and ill give you my opinion on it. whatever it is it will be better than the stock exhaust manifold and i seriously doubt that it will be anywhere close to as good as a SVT header. rule of thumb on headers for the zetec, dont waste your time on any other header except for the SVT header or one that is a clone of the SVT header because nothing else on the market comes close to it.

yes exhaust diameter makes a difference. while this isnt a 100% correct statement ill lay it out anyway and get griped at later for it. but the zetec typically makes better power the more you can open up the exhaust. it would probably make super badass awesome power if you had a header that was just 4 open pipes that went strait out the front grill with no bends whatsoever. okay that last bit might be a bit of a stretch but the basic concept is true.

it has been dyno proven dozens of times that the zetec makes the best power in open header configuration, that is with NO exhaust at all. its just illegal and very LOUD like that so therefore you have to run exhaust. so however much you can open the exhaust is going to correlate to how much power you make. the deciding factor with 90% of people however is how the exhaust sounds and how much it costs and generally 2.25 sounds best and is cheapest followed by 2.5 which doesnt quite sound as nice and tends to cost more and then followed by 3inch and bigger which sounds like ass on most N/A cars and can be ungodly expensive in most cases.

hope that answers your question

darossi3 · 01-11-2013, 03:54 PM

Quote:

Originally Posted by zetecDon

I guess this just answered my question lol. Does it drone really bad cruising at highway speeds? I know when I just had the FS race header with my JBA exhaust it was loud and obnoxious. I was tired of having to wear earplugs so I changed over to the SVT header lol.

Well with the "stealth" resonator, when you give it gas its loud. When your cruising, the tires are louder than the exhaust, on michelin super sports<- not a cheap tire. Youll hear it JUST enough to know its there, but with music you wont hear it.

thingsidont · 01-11-2013, 05:06 PM

Quote:

Originally Posted by focusmaniaczx3

post a link to the header you are speaking of and ill give you my opinion on it. whatever it is it will be better than the stock exhaust manifold and i seriously doubt that it will be anywhere close to as good as a SVT header. rule of thumb on headers for the zetec, dont waste your time on any other header except for the SVT header or one that is a clone of the SVT header because nothing else on the market comes close to it.

yes exhaust diameter makes a difference. while this isnt a 100% correct statement ill lay it out anyway and get griped at later for it. but the zetec typically makes better power the more you can open up the exhaust. it would probably make super badass awesome power if you had a header that was just 4 open pipes that went strait out the front grill with no bends whatsoever. okay that last bit might be a bit of a stretch but the basic concept is true.

it has been dyno proven dozens of times that the zetec makes the best power in open header configuration, that is with NO exhaust at all. its just illegal and very LOUD like that so therefore you have to run exhaust. so however much you can open the exhaust is going to correlate to how much power you make. the deciding factor with 90% of people however is how the exhaust sounds and how much it costs and generally 2.25 sounds best and is cheapest followed by 2.5 which doesnt quite sound as nice and tends to cost more and then followed by 3inch and bigger which sounds like ass on most N/A cars and can be ungodly expensive in most cases.

hope that answers your question

its the Focus central header. the one OBX copied

***freemind*** · 01-11-2013, 08:18 PM

I Like my OBX. I got an 11whp gain from it.

***sleepyboy*** · 01-11-2013, 08:24 PM

SVT = 15whp
Others = 10-12whp

Of course anything is better than the convulted mess of a factory manifold. I recommend staying away from the "shorty" headers since they don't have any of the top end gains that the long tubes have.