Leaning out with a Test Pipe?

[Jon91TSi]

Hello all,

I have a question.. I just recently installed a test pipe.. My car is pretty much stock except for a K&N, Turbo XS DSMBC, and an upper ic pipe.. Before the test pipe my trims looked like 90% Low 96.4 Medium and 96% high.. Now that the test pipe is on my trims look like 124% Low 108% Medium and 116% High. Why would installing the test pipe make it lean out on the trims so much? I logged a run at the track and my 02 was .94 volts the whole time at 18 psi with 0 knock on 112.. But why would it be shoing so lean across my tables? I unhooked my battery and reset the ecu so it could maybe learn the test pipe but my trims are the same again..

Whats going on?

Jon

 

[blackGSX2g]

Well o2 volts at .94 isn't bad at all, I think the safest lowest limit for a 1g is around .91 on pump gas. I would say as long as you aren't picking up any knock or timing retard, no damage is being done.