12 psi barrier

**kiddmx6** · 4-30-06, 12:16

okay, the problem is that i cant push past 12 psi on my stock turbo, i know thats suppose to be the ecu barrier STOCK. but i have a prohibitor chip in my car that i should be able to push 16 psi. it steadily increases and holds at 12 psi or 11psi. so my boost controller is opened way up to push well into the 20's. not sure what it is. is that just what my turbo will push? bov isnt compressed enough?

757-A_V_8_R · 4-30-06, 13:42

Quote:

Originally Posted by kiddmx6

so my boost controller is opened way up to push well into the 20's.

And by opened way up you mean screwed down, right? Not trying to be funny just making sure you know. (opened all the way up means stock boost setting)

**Zach** · 4-30-06, 13:49

either you installed the gauge wrong.....OR it's because you're in higher elevation (likely). Ask around, rebel and ryan and a few others live in high elevation, see what numbers they got with stock turbo.

otakuspeed · 4-30-06, 14:01

Sounds like you might have a leak somewhere.

**Zach** · 4-30-06, 14:17

do you not see where he's from? thinner air is harder to compress, unlike air at sea level....remember earth sciences in high school?

**rebel2k4** · 4-30-06, 14:30

Ahhh! we got one from colorado springs. Where are you in the springs? Im down every so often to see my girl. she lives in the dorms at UCCS. Sucks driving 130 miles one way, but the mx3 makes it not so bad with 30 mpg

But yup, you're SOL. Isnt CO springs 7000'? Here in loveland, which is 5800, you wont be able to hold over 11 psi. So yeah, that sounds about right. Dont push it or you'll snap that pile of [shizzle] stock turbo shaft in two.

Even a T3 wont be enough to push more than like 14 psi at redline, and thats with no wastegate at all.

**kiddmx6** · 4-30-06, 14:51

no way, i met a guy last night thats pushing 15 on his t3 because he hasnt got down pipe in, then running 25. but then again i know a galant vr6 thats pushing 30lbs. along with a talon pushing 30lbs. i know its possible.

**rebel2k4** · 4-30-06, 15:05

Believe what you want.

Ive experienced it first hand. I had a saab T3 on my 88 mx6. 14-15 psi is the limit at my elevation, itd only be worse there.

**Zach** · 4-30-06, 15:08

water/ethanol injection wouldn't alter the number would it?

**rebel2k4** · 4-30-06, 15:12

No the turbo physically doesnt flow enough. Maybe a 60 trim would be better than the one I had. My friend couldnt get over 14 psi on his 60 trim T3, but thats also with a 3.0L V6 so its more air being ingested.

And what is this, 30 psi on a galant with a 60 trim T3? Id have to see it to believe it. I bet you're referring to A: an upgraded turbo B: a boost spike or C: a mitsu turbo, which doesnt really mean much when we're talking about T3's and F2t's

**kiddmx6** · 4-30-06, 15:32

he had a .63 trim. both of them, they roll together. but what i dont understand is how come i cant push more than 12 psi, and im not always getting that, its spikes. through first its 8-9, 2nd is 9-10, and 3rd is 9-12, when i hit 4th i hold 10-12. now ive had it clamped shut and it wont let me. im pretty sure i dont have a leak, will check though.

**rebel2k4** · 4-30-06, 15:43

The .63 is an a/r, not a trim. All im saying is your standard T3 isnt going to hold 30 psi in CO springs, thats all there is to it. Ill put money on that. They either have something other than a standard 60 trim garrett T3 (which isnt stock on those cars anyways, nor is it an upgrade from their stock mitsu TD05 14b), or theyre lying. Take your pick.

And your boost problems are related to the pea shooter stock turbo. Its too small. I have been modding these cars for a good while and live in CO too. The stock turbo will snap a shaft before it ever holds more than 12-14 psi. Me and another guy with an 89 mx6 have broken over 5. Our atmospheric pressure in loveland is 11.2 psi. There its probably 10. That means you're pushing nearly 5 psi of boost just to be at sea level. Your 12 psi is like 18 at sea level. Yeah, you're maxxed out.

If you want more boost, upgrade the turbo.

**kiddmx6** · 4-30-06, 19:23

i wasnt calling you a liar, just saying from the performance and the mans word thats what its hitting. he could be lieing, but i do think that it is very possible to hold 30 psi here. bottom line i have opinions and you do too, no anger being put out here, just i have a feeling its possible.
ok so to push more than that here i would just have to get a bigger turbo, now if im correct how much more psi would a tbird hybrid get me around here.

**Zach** · 4-30-06, 20:20

12-14psi

and it's not about opinions here...it's science, lighter air, less pressure.

**kiddmx6** · 4-30-06, 20:55

anythings possible in this world.

anyways i have been looking through the system checking for leaks and it turns out i do have a leak, its in my bov, when i checked it there was no pressure hold. so its just been letting air right through. thanks all.