HELP wit exhaust

[atownturbo]

Ok so I have a probelm here I want to get an exhaust but I can't decided on what size. My buddy told me that if I get 3" I'm going to get fuel cut. is this true? I have a 1g laser rs with a 16g turbo pushing 16 and I need more flow. Another thing is cat or no cat? And should I upgrade my o2 housing?

 

[nlzn]

Shouldn't cause fuel cut.
Here's a very good resource on the topic: http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/186971-what-fuel-cut.html

If you are going to do the entire exhaust I would do the o2 housing as well (but that's a preference decision you have to make.)

 

[fwdmaster]

Go with a 3" exhaust, if you get a great flowing 3" exhaust it will tend to boostcreep and you will fuel cut, I would go with no cat, as for upgraded o2, just port out the stocker

 

[gofer]

...you won't hit fuel cut because of the bigger exhaust, your car hits fuel cut when your ecu detects a lean condition in your motor. you'll notice a HUGE difference in spool up since you upgraded your turbo before getting a bigger exhaust but you also might experience really bad boost creep as well... if your doing your exhaust system id save up and do it right the first time, upgrade from the turbo back. bigger o2 housing (for a 1g the 2g o2 housing ported is a good upgrade on a budget), a 3" dp, race pipe or high flow cat (i suggest high flow since its not worth getting in trouble with the police), then the 3" exhaust of your liking. just be sure to really check out the porting how to's on here because with all that flow you might be looking at mid 20psi boost creep and you'll FOR SURE hit fuel cut if you don't have an upgraded fuel system with a tune.

 

[atownturbo]

What is boost creep? Thanks for the help

 

[nlzn]

What is boost creep? Thanks for the help

Boost creep is rising boost due to not enough exhaust bypassing the housing. Mostly fixed by porting the WG.