how bad does the fuel trims get thrown off with a catless downpipe and a straight pipe with just a resonator? or it wont effect it that bad?

 

haha.. I just saw this thread after already posting a response to this question in your other thread.

 

An intake will affect fuel trims, a downpipe won't... unless its leaking before the 2nd o2 sensor.

 

what happens if i have the anti fouler in there wouldnt that effect the afr at all?

 

mine r perfect

 

DO NOT use a defouler on your primary o2! It absolutely needs to be directly in the exhaust stream to heat up properly and get an accurate a/f reading.

By all means use one on your secondary/emissions o2 (located in your dp), but never use one on your primary

 

That's what i ment i have the fouler in my Downpipe i was just curious if that mattered and with the straight pipe setup first gear is only at 5lbs if boost my friends said it barely looks like its moving. Untuned with just gms1 im probably loosing more power and tq down low than what it gets uptop now

 

You pretty much have to use a defouler with a catless downpipe, the location of the bung also plays a part in getting rid of the cel.