hahah rofl funny you say that....

just went on the evo 3" turbo back with test pipe

 

damn that is hot

 

Did you remove the CAT?
If so, did you do the non-fouler mod for the rear O2 sensor?

 

3" is way too big for the little k03. You need some back pressure for the k03 to operate right. I would only use 3" exhaust on a really BT.. .25" makes a big difference in exhaust flow/back pressure, and you went up a whole inch from stock. I think you would still have problems even with a mbc, or a n75 race valve that limits spiking. If you dont want to change the dia. of the exhaust, you better be looking at a BT if you want things to run right. Shoulda used the search first!

 

O snap SEARCH would of been good. unless your going bt. do you back fire alot with that exhaust?

 

vrum vrum

 

thanks dude, this is the kind of info i was looking for. i've learned from my current & past turbo cars bigger is better ie 3". this is my 1st audi i've modded & assumed it would be o.k. yes i have a 3" ss cat delete with the non fouler mod. check engine light has not been a problem at all. it's just that dam fuel cut. what do you think about flashing or chipping my ecu ? bigger injectors ?

installing that 3" cat delete was a major pita. what if i uninstalled the 3" exhaust & leave the cat delete then reinstall a 2.5" exhaust ?