i currently have intake, 2.5 downpipe, mid pipe, and RP catback on my T2. it also has a ported wastegate on the rebuilt turbo by the previous owner and i experience NO FUEL CUT what so ever. smooth as silk thru the rpm range so i guess he REALLY ported it. anyway, i have the Apexi N1 single catback on my 91 n/a. i wanna swap it on the T2. i ordered an FCD yesterday and am gonna put that in as soon as i get it. my question is: the RP piping is pretty small 50mm is only 2 inches...the N1 starts from 2.5 and goes to 3.4...how much of an increase in boost do you think i'd see? i don't have an aftermarket gauge, but the stock one goes about 3/4 of the way up when i'm on it. so i guess that is about 7psi. would i run too lean with the N1?
i know some people on the forum have intake, dowpipe, cats and catback and just an FCD and hit 10-11 psi. if mine is at 7 with the ported wastegate, would the N1 cause it to jump 4psi?

thanks for any info...

 

I don't have a TII but it should help, I couldn't really see 4psi but maybe. Alot of people have 3" DP & MP which would also help. You wouldn't run too lean with a FCD, which you should get before you do change the exhaust. Oh ya, do you have an intake, or no? That could have something to do with it.

 

yup....bonez intake....mods are in the sig...2.5 inch dp

 

^

 

List the exact questions you want answered because there are a few kinda spread out in that paragraph.

 

I doubt it will make much difference. maybe 1psi. I would highy recommand getting a boost gauge!

 

cool....yeah thats on my list.....boost gauge... i just gotta stop being a cheap *** and get one, hehe