i've got an intake, intercooler piping, TBExhaust and noticed my psi holding right at 17, i'm gunna be getting a fuel pump and a dynoflash tune soon and was wondering if a tune would get me back up to 19, i'm not really interesting in running higher then stock boost and would like to avoid spending the money on a MBC if possible, would a tune get me back to 19?

 

If you don't plan on running higher then stock boost, and you are not running a MBC or EBC, no need for a fuel pump!

 

Well, your boost should already be higher than stock, not lower, so that means you have a problem in your installations...or the intake is hurting you. The Dynoflash can set your boost right around 20 and keep it from tapering, but only if the system is tight and sealed with no leaks or issues.

I find it quite foolish to waste all the money on an intake and IC piping, but not spend $85 on an MBC that allows you to set your boost right where you want it for the max safe power. Btw, the point of the fuel pump is to account for increased boost over stock...

 

I was thinking the samething, but didn't want to write it all down! Well said

 

Just get a MBC its only $85. And you will get some Good Power.

 

MBC in my eyes is the best mod for the price in my eyes. What height above sea level are you at. I know where Im at my car can be set at 20 psi and run safely. 24 with water alcohol injection. Get a brass one off ebay for 60 bucks...its worth it

 

No, do not get a "brass one" off of Ebay. Get a proven, high quality MBC like a Hallman or a Forge UNOS. Don't screw around with your MBC...

YOu can also run far more than 20psi at elevation on pump gas and far more than 24psi at elevation on alky.

 

I agree... I don't know why not get an MBC for fine tuning if you're going the spend money of the rest of the mods.

 

You can down on sea level but where im at 3000+ above sea level 20 is max without it. I would agree on paying the extra 25 bucks but if he is stressed for cash my brass one is doing just fine. The only time I have problems is when I adjust it. Its a guessing game but once its set its all good.

 

You got it backwards, Gmvehar. Notice I said AT ELEVATION, meaning I know the difference between sea level and high altitude. The higher the altitude, the more boost you can run on the same octane, because the atmospheric pressure is lower. There is nothing about 3000' elevation that makes you have to run 20psi. You just got your Evo and it's all screwed up, yet you're trying to tell ME what boost is proper. I Just moved from sea level to 6000' in Colorado, so I have very recent experience with this. People run way more boost up here on 91oct than people at sea level on 91oct. You got your facts backwards...running 20psi is too low. Also, if your boost gauge is reading 20psi at altitude, then you're really running even less than that, because of the lesser atmosphere. YOu have to get the Manifold Absolute Pressure (MAP) to see your true boost. My boost gauge is about 3-4psi too high here at 6000 feet.

 

Just cause everyone is doing it doesnt mean that its SAFE. And where did you get the idea that I just bought my car? I have had it for years now. Stock boost level are about 17 then fads the 15 at this level. I think were at the same altitude also. Its a whole lot hotter out here also. Maybe Im wrong, but I have been doing my learning from people with lots of skill and sense. Maybe Im wrong but ya...

 

You said you're at 3000...I'm at 6000. I got the idea you just bought your car by the fact you just showed up this week and don't seem to know ANYTHING. If you've had your Evo for years, then that is very disappointing.

If you really think you're right on this, then continue enjoying your 20psi, but do NOT spread your misinformation to others on this board. It is absolutely foolish to think you can run MORE boost safely at sea level than at altitude...that just makes no sense whatsoever.

 

Is it not more difficult to make 20 psi at high altitude verses sea level?

 

You are being too general. You aren't speaking in terms of MAP. It is harder to get the same MAP at elevation as it is at sea level, but how many of us have MAP-based boost gauges? You run 24psi up here on pump gas, but if you use a MAP sensor, you will see 20psi. Anyone running 20psi on their boost gauge will be only running around 16-17 MAP. That is the key.

 

O, thank you for the information. I appriciate it