I hit 20-21 psi then it falls off to 16-17psi.. you can convert that into bars I hope...

 

what rpms are you seeing this boost?? try to floor it in 5th gear right around 2800rpms and see to what it spikes!

 

My Evo VIII boost 1.8 bar and tapers down to 1.3 bar.. just down pipe and intake no tune

 

in my experience the factory gauge was reading 2 psi high so i'm sure they aren't all that accurate to go by. i'd definitely do a leak test anyway and would reccomend it to anyone that hasn't since even from the factory, these cars usually have some small leaks somewhere that you won't notice unless severe, but you will definitely notice the improvement when they're fixed. i do them periodically as part of my preventative maintenance.

 

the rpm is is max boost arount 3500-4500. It tapers down to 1bar around 5600-redline

 

stock gauges are in kg/cm and not bar... reads a little higher than Bar. Here is the conversion calculator. http://www.csgnetwork.com/boostprescalc.html

my stock IX would do the same, it would go 1.2 kg/cm to .9 or 1.0 at redline

 

So that means I am only running 17-18 psi to around 14.2psi close to redline. Is this common for most IXs?

 

All in all...get a manual boost controller.....you'll fall in love with you car again at a whole different level!!

 

Is there a write up about the differences between a electronic and manual boost controller? I had a manual boost controller in my old car and liked it a lot, so is there any benefit using a manual one?

 

I am no expert but I have used a few different boost controllers in my day including:

HKS EVC PRO
Greddy Profec B SPEC II
Original Greddy Profec Spec B
Greddy Type S
Greddy E-01
Kinetic Manual MBC
Hallaman MBC
APEXI

I like simplicity, even though not all of the BC I listed above are simple. Obviously the electronic ones you can switch between high and low boost on the fly which is a nice feature. My favorite is the Greddy Type S or the Original Greddy Profec Spec B, so easy to use and hold boost just great.

My kinetic manual boost controller did it's job for $40. Sure I had to pop the hood to change the boost levels, but I didn't change them to much so it was ok with me. IMO I feel that the Greddy Type S held boost better for me, maybe It's all in my head but I liked that BC a lot.

If your a little tight on cash get a MBC, if you feel like spending some money and have in cabin control of your boost, then the Greddy Type S would be my choice.

Hope this helped a little.

 

What gear are you reading these boost levels in? If you are in low gear those numbers are probably about right.

 

my stock evo IX MR did the same thing!! its just how they r made! a boost controller will help... set it all the way to 1.5 bar and you wont have any problems.. but it is normal dont worry!

 

thanks that's what I wanted to hear. I appreciate all the help. As for the boost controller , I think I'll break down and get a profec type s.

 

Smart man

 

looking at mine, i spike to 1.4psi and taper down to 1.2-1.3. completely stock unless window tint and a shorty antenna give me more power.