Weapon r street header questions

[JoeF]

Ok I am looking at this header for my 07 AT sport and when I look at the dyno numbers it is saying max hp at4200. That cant be right? can someone explain.

THanks

Joe

[GravityFit]

the only thing i can think of when it says that is that it generates its max hp is at 4200 rpm? other than that i dont know lol.

[Sugarphreak]

Originally Posted by JoeF

Ok I am looking at this header for my 07 AT sport and when I look at the dyno numbers it is saying max hp at4200. That cant be right? can someone explain.

THanks

Joe

The Manual Fit we tested as a baseline put out max power @ 5800RPM & Max Torque @ 4900RPM. I actually like having more power lower instead of spooling up to it.

I have a dyno chart from a while back, it is a baseline compared to my run (please, don't ask why my run was so low). With mods you can see the car makes more power down lower.

Things to remember here; 1) it was on a Mustang dyno which typically reads lower 2) Calgary is not at sea level, in fact we are 3450ft above sea level which also impact the power output.

[JoeF]

So the header actually looses torgue between 2500-3100 rpms that is right where I drive most days going and coming to work so that would be a bummer.

[JoeF]

Is there a better header that is smoother in the torgue and hp that the weapon?

[suketoborudo00]

probably DC header. i havent tested this header for myself yet though.. but having seen both in person..

dc header piping is a little bigger than stock piping.
weapon r street header piping is bigger than dc header piping.

dc header piping seem a little more longer and pipe bending seems smoother.
weapon r street header piping seem a little more curved than dc header.


there are a few postive dc header review threads in the exhaust topic area.