hey everyone have a 9 mr and just installed injen intake with uicp and only making 15 pounds of boost sometimes at higher gears 4th and 5th it will make 19 pounds i did change boost gauge i think i was making 1.2 to 1.4 on stock boost gauge check very good for leaks i have heard that some evo 9's are coming from factory only making 15 pounds max so not sure if this is normal only have exaust and intake

 

that's how they are... get a mbc and flash and it'll hold steady at your desired boost setting

 

Well you have a leak or installed your boost hoses incorrectly (most likely)...You DO NOT NEED an MBC to hit 25+ psi....

 

Unless you get a tune that Intake is worthless and can make your car run like crap.

 

Different loads in different gears means boost will vary by a few PSI. I'm tuned for about 23-24psi peak but I usually don't see higher than 22.8psi during a third gear pull. It spikes and then tapers to about 18psi at redline.

 

Mine did the same thing when I was stock. There designed to do that. Get a MBC, it will hold the boost more consistantly. After 3rd, mine holds 1.5 all the way to redline... It will pull like a dif. car...

 

i've heard from some people that the car boost to what the conditions will allow being the air-fuel ratio the ecu is reading. so see what it does on a colder day it might boost more. my friend was having the same problem with his 9 i showed him how to install his boost guage and it worked fine till the weather warmed up then he thoguth he had a boost leak so he check all his clamps . there was no boost leak . it just wasnt seeing good air-fuel ratio's