since i know this is the welding section... you guys would pay particular attention to header details...
(if this i am wrong... please move this to the appropriate place.. TIA)

anyways... what is the difference between the jdm header and the US DC header (both being 4-1), anr's header, smsp's header etc.... BESIDES the collector size... specifically... are the US DC headers primaries not as long as the better headers (ie, smsp's, anr's, etc)

again.. TIA

 

That quote ^ up there is some funny as ****

I having problem...........

 

Long primaries are not necessarilly better

 

so what makes them expensive headers top notch? besides the quality aspect.. i'm speaking of a design stand point (for an n/a setup)

 

There are many things to be considered in designing a header for specic application

such as

Primary sizing

primary length

4:1 vrs tri Y

Collector sizing and angle

Tail pipe sizing


on and on etc a header designed to a partciular application is going to compliment that partciluar engine better then another header will

Example i designed a header for a top notch race team SCCA

They chnaged cams hafts built the header the gains showed 38+ hP from 2000-4000 and from 4000-8000 3-4 hp

I redesigned the header i redesigned the header with the new camshaft 2000-4000 gain was 3-4 4000-8000 = 15 + HP

shows how muhc a simle cam chnage can afftect the header designed

Occasionally you can get a good middle of the road header that will compliment a wide variety of engines but there is muhc more power to be gained from one designed for a specific combination

 

with headers its obvious , you get what you pay for.

wrong forum also.