overkill

What is the correct boost pattern for the M2 performance STAGE 2 UPGRADE? I always thought is should be 10-12-10. Is that correct? I did a few 3rd gear runs from 40 mph, and it SEEMED like I was getting 10-10-12/13. Granted. it was hard to watch the boost gauge and the road at the same time. Is that the normal boost pattern?????

adam c

iTrader: (2)

The M2 ECU does not have an adjustment for boost. Boost levels will vary depending on what you have done to the car. Your boost pattern should be something like 12-10-12. Anything more than 12 without an intercooler upgrade is a little risky.

Adam

scratchjunkie

your boost levels look about right. m2's ecu upgrade use to be 12psi, but was tuned down to 11psi due to our highest octane of 91 in california. you should always have a dip at the transition of boost though, so 10-12-10 is a negative.

overkill

sorry I meant to ask." shouldnt it be 12-10-12? It seemed like mine was 10-10-12 or 13. Does that sound coorect??

overkill

Mods are m2 cold air intake, m2 dp, apex n1 dual, and m2 stage 2/3 ecu upgrade.

Yea I thought it was supposed to be 12-10-12, but mine didnt seem that way. I hope ther is notsomething wrong with my car...

adam c

iTrader: (2)

You can install a manual boost controller, and pre spool controller. It's pretty simple to install, you just have to be very carefull adjusting the levels, especially the pre spool level (the second reading in your boost pattern)

Go to rob robinettes website. Instructions and good photos are available there.

I'm in SLO. Where is Martinez?

Adam

overkill

Martinez is east of San Francisco. About 30 miles. I really do not want to install a manual boost controller, merely wondering what the damn boost patern should be, and if mine is correct..

scratchjunkie

another thing..are you sure you are flooring it?

overkill

I'm pretty sure that when M2 retuned the ecu, the boost is modfiied, along with the fuel and ignition. But you are correct when saying boost is determined by what modifications are on the car.....

r0gu3

I see a 11-9-13 boost pattern if I get boost.

adam c

iTrader: (2)

After installation of my M2 stage 3 ECU and downpipe, I was boosting to 12 or 12 1/2. I then added a efini y-pipe, stock air box mod, and boost gauge. I found I was now boosting to 15 1/2. I had to put in a boost controller.

kento1

What kind of an IC do you have? Curious, 'cuz I was interested in thebestmotoring's M2 Stage 3 ECU, and I have very similar mods to you...

adam c

iTrader: (2)

I have the stock intercooler for now. Looking to change to a SMIC in the near future.

I set the boost controller to around 12psi. The car was scary fast at 15 1/2psi, but I would rather not blow my engine.

kento1

So if I was to get the M2 Stage 3 ECU with my mods (Greddy SMIC, Efini Y-pipe, modded stock airbox, DP and CB), I would most likely get 15+psi?

However, this would require an upgraded fuel pump, no?

Aristo

iTrader: (8)

The M2 ECU is tuned to take into account the added efficiencies of DP, Intake, Exhaust ETC, and has a wastegate solenoid duty cycle fixed at what 'should' yield 12-13 psi. I think this duty cycle is set such that it actually reduces the boost seen with these modifications as compared to a stock ECU (you would never see above 12 psi on the stock ECu anyways though). Of course, each car is different, and after adding this ECU one may see a little more or less than 13 psi, in which case the boost must be dialed in properly either by changing the pills' orifice sizes, or adding a boost controller.

Mahjik

iTrader: (1)

Upgraded fuel pump? Some people say yes, some people say no.

To be honest, the only REAL way to tell is to have a fuel pressure gauge installed. That will let you know when you need to upgrade your fuel pump.

kento1

In other words, the M2 stage 3 ECU fuel maps (and the stock fuel system setup) are not suitable for boost levels above the intended 12-13 psi, unless fuel system upgrades are done?

xurotaryrocket

I have m2 stage 3 with M2 CF intake, M2 dp, and RB dual catback.

Brian from M2 states that it should be around 13 psi. My boost gauge is a tad inaccurate as it shows my peak at just over 14psi.

However, AIM hooked up some good equipment and said I have a tiny spike to just over 13 (13.2/13.3) psi which quickly levels out to about 12.8 psi. So I am happy with that.

my gauge shows 14-12-14 which should really be 13-11-13

kento1

Do you have an IC? I noticed that installing my SMIC bumped up my boost levels by 1-2 psi, depending on conditions. Which boost gauge do you have? Autometer? (which I've heard are notoriously inaccurate)

adam c

iTrader: (2)

My understanding (I'm no expert) from talking to Kyle & Brian at M2 is that the the ECU upgrade does increase your boost a little. I didn't have a boost gauge when I went to Mostly Mazda (M2) to get my downpipe and ECU upgrade installed*. I assume my boost was 10 psi max when I arrived, as my car was bone stock. When I left, Kyle tested the boost with his gauge. It was up to 12 1/2 max. The down pipe alone is probably worth one extra pound of boost. So, the ECU must be good for at least one extra pound.

*Tried to do the downpipe myself.........one damn nut locked/welded in place.......but that's another story.

Aristo

iTrader: (8)

Yeah the fuel maps are not for use above 13 psi, but then again, no ECU running with the stock fuel system would be very safe above 13 psi anyways. The good thing about the M2 ECU is that it leaves a decent safety margin (A/F around mid 10s) in case the fuel system is not running just perfectly. Perhaps with a RRFPR you could press your luck running more that 13 psi on the stock fuel system and the M2 ECU.

xurotaryrocket

m2 stage 3 ecu sets the boost level at 13 psi. If you think about the fact that with a stock ecu, each bolt on mod would increase your boost by approximately 1 psi that would equal 13. In this case the M2ecu sets the boost at 13 AND provides the fuel for 13.

adam c

iTrader: (2)

That doesn't explain how my car was boosting 15 1/2 psi on a M2 stage 3 ECU. The ECU sets the boost at a certain level. For the sake of arguement, let's say that is 12 psi. Then when changes/mods are made, the boost is changed. Obviously, an intake will increase your boost. The ECU WILL NOT automatically adjust the boost downward to compensate. Now you will have 13 psi or so. Add a Y-pipe & cat back, and you are up to 15 1/2 psi(like I was). The ECU is tuned to provide more fuel than stock, so it will accomodate these mods, but you should lower the boost with a controller.

M2 doesn't reccommend using a mid pipe with this ECU because that is getting toward the end of the "safe" fuel levels it provides.