2003 G35 Sedan Dual Exhaust
#17
Yes, the issue has more to do with filling up the tank. When I first did mine I removed it completely and the fuel tank did not have a way to vent air when I added fuel or the temperature changed so I had to put it back in.
It does use engine vacuum to pull fuel vapors through the motor and help with emissions but that was not the reason for me keeping it.
It does use engine vacuum to pull fuel vapors through the motor and help with emissions but that was not the reason for me keeping it.
#22
As a Scientist/Engineer I always measure things to the extreme before I do physical work.
Measure the back pressure after cat at various rpms. Each PSI is roughly 2 HP worth of restriction.
You will see that the back pressure does not begin to climb until you exceed torque peak rpm.
Then you must balance potential gain against noise increases.
http://www.veryuseful.com/mustang/te...Scavenging.pdf
http://www.thrashercharged.com/tech_htm/exhaust.shtm
Measure the back pressure after cat at various rpms. Each PSI is roughly 2 HP worth of restriction.
You will see that the back pressure does not begin to climb until you exceed torque peak rpm.
Then you must balance potential gain against noise increases.
http://www.veryuseful.com/mustang/te...Scavenging.pdf
http://www.thrashercharged.com/tech_htm/exhaust.shtm
#23
It's not hard at all... the biggest problem is having the tools there to help you complete the job. Make sure you keep it nice and neat. Take your time to make it look good.