i know this subject has been touched on before, but i was explainig to a friend yesterday about the stillen true dual and an interesting question came up:

why does an X pipe work better than a straight through design? wouldnt having no X or H or whatever pipe be better becuase there are less bends in the piping?

G35S 6MT
Technosquare ECU
350Z Springs & Struts
6-wire ground kit

 

a X pipe creats some kinda better flow. i dont realy understand it but some how becuase they cross it makes the gases come out faster. also an H pipe creates equal pressure betewn pipes and makes better flow as well



<a href="mailto:Carlos3186@hotmail....otmail.com</a>

 

An X-pipe is aerodynamically superior to an H-pipe. An X-pipe equalizes pressure in both pipes and improves exhaust gas scavenging.

'03 G35 5AT Sedan, Garnet Fire/Willow
18x8 SSR GT1/Bridgestone PP S03 225/45/18Y
Eibach Pro-Kit Springs & Anti-Sway Kit
Stillen Cat-Back Dual Exhaust System

 

One more time... the x-pipe improves exhaust gas scavenging and cylinder "charging".

Here's a good article on the real world benefits.
http://www.carcraft.com/techarticles/69238/


DaveO
2003 G35 Sedan - DP / Willow / AT / Premium / Sport
350Z Engine Cover, T-Stat & Air Duct / Stillen CAI
GG 7-Wire H-G Kit / TS ECU / E-Fans
Street Edge TC / B&M Cooler / Stillen Exhaust

 

im not talking about X pipe vs. H pipe. im speaking of X pipe verses no crossing pipe at all. just a straight pipe.

G35S 6MT
Technosquare ECU
350Z Springs & Struts
6-wire ground kit

 

The article mentioned above shows the relative merit of open header vs. H-pipe vs. X-pipe, and describes the whole deal in detail. Give it a shot.

'03 G35 5AT Sedan, Garnet Fire/Willow
18x8 SSR GT1/Bridgestone PP S03 225/45/18Y
Eibach Pro-Kit Springs & Anti-Sway Kit
Stillen Cat-Back Dual Exhaust System

 

A great and simple read - thanks bullseye! Just waiting to pull the trigger on the Stillen system, this adds more ammo to the thought.

2003.5 Sedan Black/Black w/ sport, premium, aero, and winter packages. See my profile for updated mods list and pics.

 

The read is great, and DaveO is one of my go too guy's.
I spoke with a borla rep. who told me the H and X pipes
add some turbulance, slight back pressure, and some
torque. The same is true of smaller dia. exh.sys. pipeing.
More hp gains on the top-end can be made straight through.
I said it before " choose your manufactor, pay your $, and be
happy".

old road rat

 

errr, yeah sorry DaveO! Thanks to you too! [img]/w3timages/icons/blush.gif[/img]

2003.5 Sedan Black/Black w/ sport, premium, aero, and winter packages. See my profile for updated mods list and pics.

 

ooh right. it does talk about the open headers. sorry, my bad.
has anyone actually installed a straight pipe on the G? any dynos of that?

G35S 6MT
Technosquare ECU
350Z Springs & Struts
6-wire ground kit