MPI Tuner for... NA?

[DooMer_MP3]

Out of curiosity, what is the feasibility of using the MPI tuner for NA applications? I would think it would just work as is, but when thinking about it. I have a couple of questions.

From my understanding, the turbo module is basically a voltage clamp, right? So assuming that is correct, I know that the voltage clamp basically limits the first O2 senor signal so that the ECU doesn't see the overly rich conditions on a turbo vehicle 12.5:1, 12:1, 11.5:1 etc. If the ECU sees this in closed loop from the O2 sensor, it will pull fuel. Bad for a turbo setup. Hence the turbo module.

So wouldn't something be needed to make the MPI tuner work on an NA car then... like say a NA module? Basically, us NA people would want to lean out some insanely rich portions of the map. However, where are all of these insanely rich portions. Are they all in open loop? Or are they also at certain points in closed loop? So wouldn't the ECU see an overly-lean condition and try to add fuel in closed loop as well?

I'd love to know. I want to do some header/exhaust/cams work this summer, but the true gains would be seen by tuning the fuel and timing properly.

Thanks,
Chris

 

[Bigg Tim]

I'm sure Nick can make something for NA. He put a unit on a BMW M5 and got like 25whp with the unit only. The peek number was like 30 something. It can be done, and you may not even need a module. Don't know if he is going to do this, I'm sure if there were enough people wanting it and he had a test mule to do it on, he may be up to it.

 

[DooMer_MP3]

Yeah, he has said before that it should work fine, but I still think that if you need something to keep the ECU from pulling fuel in closed loop for a turbo, you'll need something to keep it from adding fuel in closed loop for NA. But, thats what this thread is for .

Chris

 

[igdrasil]

Well... this is what I may try if I get tired of the turbo....
Im sure I can pull 15 more HP in N/A and stock everything. Maybe more...I dont know.

 

[DooMer_MP3]

Well keep me posted if you do. So nobody else has any opinions? MPNick?!

Chris

 

[mp3moose]

Didn't wagner/perf pull 120 peak whp with their unit on a stock p5? Definately seems worth it to the hardcoreN/A enthusist.

 

[DooMer_MP3]

Yeah I have no doubts that tuning will net an additional 15-20HP on a car, depending on mods. But I'm curious if the MPI can do it as is, or will need some additional RnD. Nobody's tried it on a NA car yet that I'm aware of. I wonder how much the ECU will fight you when you try to pull fuel.

Chris

 

[shinzen]

Definitely an interested party here, I would love to see this move forward for us N/A enthusiasts....

 

[blackp5ca]

I am hoping to purchase the MPI tuner in the next week or two, after speaking with Nick I think this is the next logical step for my car. I'll be sure to keep everyone up to date on my progress and try and post as much feedback as I can.
Looking forward to being the guinea pig.

 

[DooMer_MP3]

Cool, well keep us posted.

Chris

 

[changedman]

i tried it for a day- got rid of it until i install my turbo. It was a b**** to tune it. It was hesitating, everything, and this was with the map zeroed out. everyone said it'd be ok as long as everything was 0s, but it wasn't. Because of tuning this way and running overly rich (and getting a loud 'pop') i now have CEL p0401 and it keeps coming back. no idea what happened. it was WAY TOO FRUSTRATING. i'd never do it again.

 

[MPNick]

i tried it for a day- got rid of it until i install my turbo. It was a b**** to tune it. It was hesitating, everything, and this was with the map zeroed out. everyone said it'd be ok as long as everything was 0s, but it wasn't. Because of tuning this way and running overly rich (and getting a loud 'pop') i now have CEL p0401 and it keeps coming back. no idea what happened. it was WAY TOO FRUSTRATING. i'd never do it again.

Not sure what the problem is here. Think about what you are saying. That would mean that everyone who has the MPI tuner would have their car run like s*** off of boost. This is 100% not the case at all. The cars when tuned right will run better then stock off of boost. You should have had not problem at all. The 0 is for the timing at idle. You would to have had to tune the car. I did not see any posts about you having problems with the tuning. So if you were stuck then why did you not ask for help? We have a lot of people in the MPI Tuner family on this forum. When tuned right they are very good running cars. It seems to me that you could not get a handle on the tuning end of it. I suck at video games, some of them sell millions of them a year. Because I suck at them does not mean that the game is no good. It means that I am not the good at playing that video game. I would bet the more I paly it the better I would get.

I have seen one other member try to tune the stock injectors. He would not listen to anyone on what to do or how to tune the stock injectors. Then after two days he makes a post the stock injectors cannot be tuned with the MPI Tuner. My guess is that he to did not have a handle on how to tune the can yet. But rather then ask for help or work the problem he make a about what the MPI tuner cannot do.

The MPI Tuner is more then able to tune any NA car or Turbo car. It will take the person who is hitting the key pad understanding what needs to be done.
If you still have the system and you would like help in getting it set up please let me know. I will be more then glad to help you get your car running 100% spot on.

 

[changedman]

It wasn't the MPI tuners fault- it was mine- i was just frustrated.

 

[DooMer_MP3]

So MPNick, can you chime in with any info on an NA vehicle? Do you think the stock ECU will try to ADD fuel when the MPI is trying to lean it out a bit?

Chris

 

[changedman]

i was running insanely rich.

 

[MPNick]

So MPNick, can you chime in with any info on an NA vehicle? Do you think the stock ECU will try to ADD fuel when the MPI is trying to lean it out a bit?

Chris

Not if done right. Just like the MPI Tuner on the turbo cars. We can control the fuel. Anyone how whats to work with the MPI Tuner on an NA car let me know. I would do a NA setup at a real good discount in exchange for feedback.

Thanks again

Later.....Nick

 

[bazooka joe]

i'd be interested....tell me more....what kinda numbers do you think you could do?? thanks!

 

[stdntDrvr]

i'm interested...here's my mods:
http://www.cardomain.com/memberpage/523852

 

[mp3moose]

someone take this that has some tuning experience. I want an mpi unit, but I have zero knowledge here.

 

[FC3s Boy]

p.m sent we have a test mule and can tune it