Hix

Yea same with mine. But I have an 11psi spring and I hit all of 6 psi. I just got a boost controller and cranked it up. No vacuum leaks, small exhaust leak, tial WG, no altitude problems. Figure I'll just get a 30psi spring and hopefully hit 20.

paul_dezod

What size exhaust?

Crafty55

I have 2.5" s-pipe and the Tanabe concept G axel back, which I believe is close to 2.5" as well.

I still have the oem mid-pipe with the stock cat and I think it's a resonator on there.

Ace83

iTrader: (6)

i would think there is something else other than the restrictive exhaust... some guys on stock exhaust boost on 8-9 psi fine.. though freeing your back pressure might help

Crafty55

Weird. Well, once I get the mid-pipe taken care of, it'll narrow it down for us. I'll let you guys know when I do that and what the results are.

Crafty55

Any suggestions on good midpipes?

Hix

It was the same with or without exhaust, but right now I have 2.5 exhaust with a stock S-Pipe (I know I know... I got a new s-pipe but it didn't fit the car)

olaHalo

i had the same problem with literally the same setup
my issue was the wastegate was getting stuck somehow on itself (not opening all the way)
took it apart and cleaned it and it worked from then on it

Ace83

iTrader: (6)

^^ yeah that could happen too if wg is stuck open.. ola didnt you ran stock exhaust before on turbo and beat that sti at 9 psi?

olaHalo

got it on video lmao

yeah im still on stock exhaust
but ill get a cutout sooner or later

which is also why i dont think the OPs problem is exhaust related

Crafty55

Hmm, the tuner said he cleaned my WG, but everything you guys are stating is making it sound like the wg is getting stuck.

Never taken one apart before. How do I go about cleaning the WG?

emrules2001

Did you get it tuned at UMS? They topped mine out at 6.5psi, and said they could go higher if I had a boost controller.

Crafty55

They told me the same thing but said my exhaust is the reason it won't go higher than 6.5.

vk5112

did u ever get this fixed.

im having the same problem right now

DezodDon

Here are the possible problems.

1. Massive exhaust leak pre turbo.

2. Very restrictive exhaust

3. Incorrect WG spring

4. Massive Boost leak

If they are taking the boost source from the turbo compressor housing and at WOT your boost gauge reads 6 then you have a boost leak somewhere past the outlet of the turbo

BlackKnight

This.

Crafty55

1. no exhaust leaks

2. only restrictive part of the exhaust I have is the stock midpip, is that considered "very restrictive"?

3. WG spring is correct, i double checked and had the shope check as well

4. No boost leaks.

Crafty55

That would still only bring me to 7 or 7.5...

gwopsta

im going thru the same thing as we speak, no exhaust leaks

went from a tial 8.7 lil blue spring to the big green 13.05

and i was only able to boost up to 10psi, i just knew dezod sent me the wrong spring but i checked and its the right color

i dont think its my wg or my gauge being that it worked perfectly till i replaced the spring. i may have to try cleaning the wg and checking for leaks once again....this sucks

what boost controller does any1 recommend, im hesitant on using these, being that if it fails and has a massive spike im F___ed

SoFloTC

iTrader: (3)

aem truboosttttt