Worlds best O2 tuner/clamp by MPI

[joka1]

how much psi with 2 extra injectors??

 

[Bigg Tim]

very much thanks Big Timm...

I have one question... does your AEngTemp 1X16 map moves from top to bottom? top = no load, and bottom = big load?

Yes, but you don't get the full resolution of the column, it's only about half or less of the column.

 

[Bigg Tim]

how much psi with 2 extra injectors??

Dean is up to 22psi. I wouldn't think too much more then that. 22psi may even be at the limit.

 

[Kooldino]

I guess I'm not quite clear on what this does exactly. IIRC, the FM voltage clamp makes it so that when you boost in closed loop, it reports a stoich AFR, right?

So what's the advantage of this? Does it just make it so that it can report ANY AFR instead of just being limited to stoich?

And what exactly does the -100 mean?

Can you have this voltage clamp hooked up along with the MAF or MAP?

 

[Kooldino]

Yes, but you don't get the full resolution of the column, it's only about half or less of the column.

Can't that be tuned with the sensor calibration?

 

[MPNick]

I guess I'm not quite clear on what this does exactly. IIRC, the FM voltage clamp makes it so that when you boost in closed loop, it reports a stoich AFR, right?

So what's the advantage of this? Does it just make it so that it can report ANY AFR instead of just being limited to stoich?

And what exactly does the -100 mean?

Can you have this voltage clamp hooked up along with the MAF or MAP?

You are programing in a AFR for the stock O2 to read.

For turbo people it is a very easy way to get your AFR in check without alot of tuning.

For the NA guys it is a great way to tune for any mods.

-100 means you are sending the stock PCM a very lean AFR.

Yes you can still run a MAF or a MAP.

 

[MPNick]

Can't that be tuned with the sensor calibration?

When you run the MPI tuner in O2 tuning mode the input becomes 0 to 1 volt. So the sensor calibration will not work for the analog in. It will still work on the AMP scale. So if you are running a MAF or a MAP to control your extra injectors you still have the full calibration. The same will hold true for the boost retard.

 

[joka1]

so what do you suggest as the safe boost level with 2 extra injectors tuning with the mpi as an o2 clamp???

 

[MPNick]

so what do you suggest as the safe boost level with 2 extra injectors tuning with the mpi as an o2 clamp???

More then stock motor can take.

15psi.

 

[Kooldino]

You are programing in a AFR for the stock O2 to read.

Right, just what I thought.

-100 means you are sending the stock PCM a very lean AFR.

So that way the stock injectors open up as much as possible?

But wouldn't this cause a "bank 1 too lean" CEL?

Yes you can still run a MAF or a MAP.

Will your MAF or MAP still be used in the AMP column under the timing and injector maps?

 

[joka1]

ok, so what do i need to do?

 

[MPNick]

Right, just what I thought.


So that way the stock injectors open up as much as possible?

But wouldn't this cause a "bank 1 too lean" CEL?


Will your MAF or MAP still be used in the AMP column under the timing and injector maps?

Not sure if they go 100% duty cycle but they do add alot of fuel.

Have not seen a cel with the NA or the Turbo car. You have some room to work with the O2 so I do not see this as a problem.

Yes you have full tuning of the extra injectors just as you have now. The AMP column is still used and working.

 

[joka1]

hey nick can you pm me or e-mail me the way to run this please??? thanks alot
rob

 

[Kooldino]

Not sure if they go 100% duty cycle but they do add alot of fuel.

Makes sense.

Have not seen a cel with the NA or the Turbo car. You have some room to work with the O2 so I do not see this as a problem.

Interesting. I'm suprised it doesn't freak out and report a lean error. In theory, I figure it should.

Yes you have full tuning of the extra injectors just as you have now. The AMP column is still used and working.

Cool.

 

[MPNick]

Makes sense.


Interesting. I'm suprised it doesn't freak out and report a lean error. In theory, I figure it should.


Cool.

I would guess if you gave it a 21 to 1 afr it may trip a code. But if you give it normal numbers 14s to 16s you will be fine.

 

[MPNick]

Makes sense.


Interesting. I'm suprised it doesn't freak out and report a lean error. In theory, I figure it should.


Cool.

With you running a MAP sensor you might fine a little better AFRs at lower boost and light throttle.

 

[Bigg Tim]

No CEL's and still running strong. A/F numbers are still the same as before and I know I have enough miles on it for the ECU to of learned it. Sometimes I hit 13's or so when not in boost if I hit the right load condition, but that's about the only thing I've seen. I still think it pulled harder the original setup.

 

[Kooldino]

I would guess if you gave it a 21 to 1 afr it may trip a code. But if you give it normal numbers 14s to 16s you will be fine.

And what would the -100 value give it? Somewhere in the 16s?

 

[Kooldino]

No CEL's and still running strong. A/F numbers are still the same as before and I know I have enough miles on it for the ECU to of learned it. Sometimes I hit 13's or so when not in boost if I hit the right load condition, but that's about the only thing I've seen. I still think it pulled harder the original setup.

Original meaning the TM + MAF setup?

Are you able to MAF tune right now?

 

[igdrasil]

And what would the -100 value give it? Somewhere in the 16s?

I think is better to see output voltage and compare the actual voltage of the O2 sensor and how the MPI interprets it in A/F ratio.