Socamoto

I have an M2 stage 3 ecu and all the bolt-ons...(intake, exhaust, high flow cat, intercooler)

I am taking my engine out due to a waterseal failure...

question is, will the M2 ecu cope with a streetport like the Pettit unlimited ecu's?

Seems logical to streetport the engine whilst its out...

Boost will remain 12/13 psi

Thanks for your time

Jon

adam c

iTrader: (2)

No. You will need need to upgrade to a tunable ecu. You will probably need bigger secondary injectors too. Regarding the Pettit, I don't believe it will work (safely) with a ported motor either.

luis@champions-motorsports

yes you definatelly want to upgrade not only for tunning but for the wallet in case something goes wrong,,,we have a powerfc in our 2rotor street ported and a microtech in our 20b wide body..we like the fcs ability to be very user friendlly but the microtech is good as well....

Socamoto

Thanks for your replies,

I read that the Pettit ecu supports all boltons and a streetport, thats why I asked about the M2.

Just wondered if I could get away with it without spending more lol...going to stay with the twins for a while.

Thanks again both, also, the intake mod is awesome adam

Mahjik

iTrader: (1)

Yes, the Pettit does support streetports. The M2 ECU has traditionally been viewed as more conservative than the Pettit ECU. Keeping your boost at 12-13 PSI should be fine with a streetport on the M2. I don't recommend going any higher.

Socamoto

Do you think its worthwhile changing to a Pettit ecu or will it be a waste of money? I ultimately plan to install a set of knightsport twins, which I assume is not compatible with either?

Thanks for your time

Jon

Mahjik

iTrader: (1)

If that is your ultimate goal, I would just hold onto the M2 ECU and then change to something programmable when you upgrade your turbos. Now, what you use that is programmable will be up to you. I would find out what people in your area are using and use that. That may or may not be a Power FC, but having someone close who can help you rather than waiting for help on an internet forum is a better priority IMO.

jeff p

you should be fine as mahjik said if you control the boost. I would set it for 11.5 max. this will give you room for cold days to spike a little bit. if you went to a pfc you would get the car to idle better with a street port and have more control of the engine for future mods.

Jeff

Socamoto

Thanks for all the info! I really appreciate it! Will take your advice Mahjik and get a standalone with the turbos

Jeff, I never thought of that! saved me from another rebuild in the near future from spiking!

Hope this thread will be useful for others in the same boat asking these questions

Mahjik

iTrader: (1)

Just get a quality electronic boost controller and you'll be set, something like the Greddy Profec.

adam c

iTrader: (2)

One of the main reasons for porting the motor, and getting all of the bolts ons is so that you can run higher boost for maximum power. Limiting to 12-13 psi kind of defeats the purpose. That being said, I would still not run 13 psi with an M2 on a ported motor.

GOB

for a bunch of weird reasons, this is my setup right now too. the idle's kind of rough and i smell a lot of gas. you guys think it's worth it to switch over to the pfc just from a reliability pov?

Socamoto

ok firstly. SORT OUT THAT SMELL OF GAS. Sorry, but this is serious. Many rx's have gone up in smoke due to fuel leaks.

Search for Fuel Pulsation Damper (FPD). This is the probable cause.

ok, the wierd idle. Try adjusting the TPS and the idle screw. Sorting out the grounds can help too. How to's are in the forum and manual.

IMO, dont bother with the pfc until the car is running 100% in the first place. It wont magically fix whats broken.

Dont mean to sound harsh, just dont want you to lose your car

Jon

GOB

it's not a fuel leak. i should clarify. the gas is only at idle. after checking it myself, i had two respected rotary mechanics in my area look at it. both say b/c of the port, the engine is running rich at idle w/ the m2. one suggested i go with the pfc, another said i'm fine with the m2.

Socamoto

ahh! I get you now. my mistake there

Mahjik

iTrader: (1)

Not at all. Airflow is airflow. Even at 10 PSI, increasing the amount of airflow through the motor still provides more power. It's the same principle as using a free flowing exhaust. Limiting to 12-13 PSI has nothing to do with porting as a ported motor at 12 PSI will produce more power than a non-ported motor at 12 PSI.

Montego

iTrader: (1)

get a wideband and stop guessing

adam c

iTrader: (2)

Of course its more power, but limiting the boost won't get you where you want to be.

Mahjik

iTrader: (1)

How do you know where he wants to be? Porting can give an extra 5-15rwhp depending on the size and the boost. That the same in some cases and bumping up the boost. Going from 310rwhp to possible 325rwhp at the same boost level is a substantial increase which cannot be ignored.

However, if that was really the case (i.e. porting without raising the boost to 15-17 PSI), no one would ever bother with increasing the boost on stock twins as they would just wait and slap single turbos on everything. However, everyone has different goals for their own cars.

gracer7-rx7

iTrader: (16)

fwiw, I made 310 rwhp and 240 rwtq at 10 PSI on a ported motor with supporting mods and a good tune. I rarely feel the need to run more boost b/c the motor already makes plenty of power at 10 PSI. Good for track use and keeping underhood heat down a bit I suppose.

adam c

iTrader: (2)

Nearly everyone wants to get the most that they can safely get out their setup. Why bother porting if you are not going to take advantage of it?

5-15 rwhp increase?? I don't know where those numbers came from. Certainly there are different ports that will give much more of an increase than that.

Back to the original question/answer: No, you can't run 13 psi safely on a ported motor with an M2 ecu. With a ported motor, the high rpm range uses a lot more fuel at WOT. The M2 unit "may" not be able to keep up at 13 psi.

Mahjik

iTrader: (1)

With stock twins, that's about the most increase you'll see with a street port. I'm sure it's not a fixed amount but probably a coefficient which will show larger gains as the boost increases. However, it has been shown that street ports are beneficial even when not increasing the overall boost, even at lower/stock boost levels. As mentioned, the benefits are increased power without increased boost so your turbos aren't working as hard to make the same power (i.e. cooler charge temps).

adam c

iTrader: (2)

No one ports their motor to make the same power

Mahjik

iTrader: (1)

Even at the same boost level, you won't make "the same power". You will make more power even at the same boost level. That's what porting does and that's why people do it...

Socamoto

The reason I ask is because I am trying to avoid removing the motor again for porting.

I'd rather get it all done in one go whilst its out and get the standalone and turbos in the future.

Just wanted to be sure its a safe way to save me time and money along the line