ok was bored so I took one of those vac/fuel pressure testers and hooked it up to my exhuast right after the header in the line going from the air pump to what would have been the 3rd cat


at idle the pressure read something like 0-1 psi

at 7000 rpms it was around 3-4 psi

and from about 3800-4500 rpms it was around 1.8 but b/c my secondary ports where opening (kinda like a vtec system giving more port duration and more port area to let more a.f mixture in) opens up at that rpm and it is based off of exhuast pressure.HA sometimes backpressure is good ... but I can fix that


just curious as to how does that compare with what you guys are running? how much room left is there to get the pressure down?



oh yeah if you guys want to hear something funny listen to your exhuast through a vac hose.... you think a fart can honda sounds bad