JBud72

iTrader: (2)

I just picked up a 2006 MR yesterday and love it. Today I finally decided to get on it through some gears and noticed that peak boost (according to the stock gauge pack) is only around 1 km/cm2 or less. I went through 4 gears. I also noticed that boost doesn't seem to taper off after 3000 rpms and just stays at that same spot throughout the powerband. I can physically feel the boost lessen up, but the gauge doesn't show it.

So do you think I am having turbo problems or the gauge just is reading inaccurate? The car only has 18000 miles on it and was kept in great condition as far as I can tell (clutch and gearbox feel golden still). I don't know if this could be anything either, but the previous owner(s) did the radio relocator and moved the boost gauge closest to the driver. Could something have not gotten connected back properly? Thanks for the help guys

edit: I tried searching first too and got mixed opinions on whether the stock gauge is accurate or inaccurate. And I am completely stock except for a Works panel filter in the stock airbox that the previous owner put in.

IXmr321

iTrader: (3)

put the car in 4th gear from about 2500rpm, go WOT and see what it peaks at. You may have a boost leak...

Warrtalon

iTrader: (6)

It's because your car was previously modded then put back to stock. You are seeing base wastegate pressure, which is only ~11-12psi, because non-stock vaccuum hoses were used to put it back to stock. that car is almost definitely not "completely stock." It was put back to stock in order to have a higher resale value and hide the fact it was previously modded and who knows what else.

You didn't notice how weak it was when you bought it? Good news is you're about to gain 70-80whp when you either put on the OEM boost hoses or an MBC.

JBud72

iTrader: (2)

So then what kind of hoses did the guy probably put on? Worse ones than stock? Where do I get OEM hoses at?

To me, the car doesn't feel weak. And I let my friend drive it (who also has a IX) and he said it felt pretty normal.

Warrtalon

iTrader: (6)

You get OEM from OEM...Mitsubishi - any dealership or website that sells Mitsu parts. The part number is listed in many threads here if you do a quick search (I don't have it memorized).

The previous owner probably just did standard vaccuum hoses, but those don't work. The stock boost configuration is complicated and has restrictor pills in certain places to regulate boost. I don't see how it could be at full boost if you aren't reading higher than 1 bar and have no taper. It will only NOT taper if you are running wastegate pressure. If you were running the full 20.3psi (1.4 bar), then it would peak and taper to 1.2 bar (16-17psi).

importjake00

iTrader: (8)

Althought you are running low boost, I have seen the stock MR gauges be off 2-4 PSI.

SILVERnSLOW

iTrader: (3)

It's not uncommon for the stock boost gauge to be inaccurate. That seems like it is farther off than it should be, though.

Warrtalon

iTrader: (6)

My stock gauge was always accurate and still is to this day - at least within a slight tolerance.

JBud72

iTrader: (2)

Warrtalon, can I grab a pill from my friend (whose Evo is modded) and put it back into the turbo side hose? Would that make the boost increase? Also, I have searched and I really cannot find the part number.

Warrtalon

iTrader: (6)

No. There are two pills, and you can't just go putting pills in and out of hoses. You need the OEM hoses from any Evo. It's very easy to find the part #. Search for "boost hoses."

Mr. Evo IX

iTrader: (5)

2 easy options that require no tuning if you are in fact running wastegate pressure because the car was not properly returned to stock.

1. Order and install the stock replacement lines and pills from the dealership.

2. Install an accurate boost gauge and a MBC with stock boost levels and generic vacuum lines.

I would strongly suggest not introducing custom pills unless the car is tuned for them. This would be very dangerous, tuning boost pills is a tricky process to begin with, and they are not plug and play. As Warrtalon mentioned you also need the OEM hoses if your going to use the OEM pills or custom pills.

JBud72

iTrader: (2)

https://www.evolutionm.net/forums/sh...24376&page=101

On post #1504, the guy gives 3 different part numbers. Which is the correct one?

FJF

iTrader: (18)

Funny, every factory gauge that was compared to the MAP sensor varied by 1 PSI max. That's a 4% maximum variance relative to 23 PSI of boost.

Warrtalon

iTrader: (6)

Read post 2604 - notice the dates. You can just contact Spins4 directly and purchase it from him.

JBud72

iTrader: (2)

Thanks. I appreciate everything. Hopefully I can get this all worked out.