back pressure??

[jakesz28]

What do you mean by "open y", you mean just dumping out the y-pipe?

I ran open headers for a week, and yes, bottom end suffered. But it's because the O2's are exposed to more air and the car will run pig rich causing a loss of power. But back pressure on a fuel injected car is NOT a factor.

Read this: http://www.uucmotorwerks.com/html_pr...torquemyth.htm

18" extensions on those long tube headers would have kept the fresh air off of the o2 sensors.


You should see my low end wideband recordings without the extensions.

[Spartan7]

18" extensions on those long tube headers would have kept the fresh air off of the o2 sensors.


You should see my low end wideband recordings without the extensions.

I only did it because I didn't have enough time to finish my header install. That was a fun week though.

[97ForMuLa]

yes dumping right out the y pipe. i dont have either of the rear o2 sensors in and i know its running really rich cause its backfiring a shitload. gears are going in next weekend then tune.

[JohnnyFormula]

What do you mean by "open y", you mean just dumping out the y-pipe?

I ran open headers for a week, and yes, bottom end suffered. But it's because the O2's are exposed to more air and the car will run pig rich causing a loss of power. But back pressure on a fuel injected car is NOT a factor.

Read this: http://www.uucmotorwerks.com/html_pr...torquemyth.htm

Very good read and good way to explain it

[StangeatinZ28]

What do you mean by "open y", you mean just dumping out the y-pipe?

I ran open headers for a week, and yes, bottom end suffered. But it's because the O2's are exposed to more air and the car will run pig rich causing a loss of power. But back pressure on a fuel injected car is NOT a factor.

Read this: http://www.uucmotorwerks.com/html_pr...torquemyth.htm

yeah just dumping off the y-pipe. but i agree with you