Worlds best O2 tuner/clamp by MPI

[MPNick]

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

It would depend on the car, boost and how you add fuel. -100 is very strong lean signal. How lean depends on all of the things above.

 

[MPNick]

Original meaning the TM + MAF setup?

Are you able to MAF tune right now?

No you only read the MAF with this setup. You cannot tune the MAF and the 2 at the same time.

 

[Bigg Tim]

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

When I put in a -100, it took the numbers from around the 14's to the low 13's or so. I then added fuel with the xtra injectors to put it in the 11-12's.

Original meaning the TM + MAF setup?

Right, It seems to pull harder the way I had it. It runs absolutly no different pre-boost right now, except maybe hitting the 13's sometimes. The transition to boost from no boost is the same, except it seemed to pull harder. I could be full of s***, but that's how it seemed. I will be going back to the other way because I think it's more efficient. Right now I have a 95 as the highest value on my injection tab, whereas I think the highest before was a 25.

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.

The SW doesn't show the change becasue it is still reading the true voltage from the O2. I would have to have a scan tool or get down there with a meter while I drive. So, I can't do that for ya man. I should be claming it at .59v, at least that's what I have in the global settings on the analog tab under the fuel upper limit. I tried to lower it, but I really didn't see much difference, so I stuck with what worked. The only real difference I saw when I lowered it was I would sometimes hit lower then 13's when not in boost if I hit the same load, so the .59 works.

 

[joka1]

ok can i please have the how to so i can do it this weekend? pretty please......

 

[Bigg Tim]

ok can i please have the how to so i can do it this weekend? pretty please......

You don't like the TM way??? Call Nick about it, I can send it to you, but I would make sure with Nick first. I want to be sure my wiring is the way he is going to tell everyone else who wants it.

 

[Kooldino]

It would depend on the car, boost and how you add fuel. -100 is very strong lean signal. How lean depends on all of the things above.

I just figured there would be a flat kind of chart deal.

For example:

-100 = .7v = the car interprets a 17:1 AFR
-90 = .55v = the car interprets a 15:1 AFR
etc

 

[Kooldino]

Cool, I may go with this sometime. I assume I can also pull fuel from the stock injectors at times too? And this all works indepenently of my MAP sensor since it's the analog tab?

If that's the case, I wouldn't mind leaning out a few places while I'm off boost.

 

[Bigg Tim]

Cool, I may go with this sometime. I assume I can also pull fuel from the stock injectors at times too? And this all works indepenently of my MAP sensor since it's the analog tab?

If that's the case, I wouldn't mind leaning out a few places while I'm off boost.

You could lean out things like the N/A guy does. I don't think you could use it with the MAP because it uses the Analog tab to tune the O2. You also use the AEng Temp column for the load tuning on it. I may be wrong, Nick would be a more definate answer.

 

[igdrasil]

it works this way...i think we dont need the FM O2 sensor anymore.

right now im setting it with the switch feature to activate the relay, more like FM pressure switch does...but this way is smarter, but i think without the relay will also work.

And I think we could also cut and tap the 2nd o2 sensor and send the same signal to the ecu and not need a mil eliminator....this way the 2nd O2 sensor will also read lean.... just a thought.

 

[MPNick]

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

Here is the info. Updated.

 

[Kooldino]

You could lean out things like the N/A guy does. I don't think you could use it with the MAP because it uses the Analog tab to tune the O2. You also use the AEng Temp column for the load tuning on it. I may be wrong, Nick would be a more definate answer.

Well, I figured I could leave my MAP where it is now (for the AMP column), and hook up the clamp to some other wire in the MPI so that the AEng temp could read it?

But if that were the case, then you could run your MAF and the clamp in combination...and for some reason you're not.

 

[Kooldino]

it works this way...i think we dont need the FM O2 sensor anymore.

right now im setting it with the switch feature to activate the relay, more like FM pressure switch does...but this way is smarter, but i think without the relay will also work.

And I think we could also cut and tap the 2nd o2 sensor and send the same signal to the ecu and not need a mil eliminator....this way the 2nd O2 sensor will also read lean.... just a thought.

The 2nd O2 sensor, eh? Does it actually make a difference in the tune of the car? I was always under the impression that it only checked for cat efficiency.

 

[igdrasil]

The 2nd O2 sensor, eh? Does it actually make a difference in the tune of the car? I was always under the impression that it only checked for cat efficiency.

well...if you clamp it, it will send to the ecu a LEAN situation when clamping, then, if you have a CEL caused by the 2nd O2 reading too rich, it may go away.

 

[Bigg Tim]

Well, I figured I could leave my MAP where it is now (for the AMP column), and hook up the clamp to some other wire in the MPI so that the AEng temp could read it?

But if that were the case, then you could run your MAF and the clamp in combination...and for some reason you're not.

Which wire do you use for the MAP?

 

[Little Beavis]

Very interesting. . .so this can all be done without even using the turbo module or the FM clamp. . .

Turf and I talked about doing a "trick" to the O2 before as well for exactly this. We just never got around to it.

Very cool, Nick. . .your help is always appreciated!

 

[Kooldino]

Which wire do you use for the MAP?

It's been awhile. I want to say the purple wire? Same wire you hook your MAF up to, I believe.

 

[MPNick]

Very interesting. . .so this can all be done without even using the turbo module or the FM clamp. . .

Turf and I talked about doing a "trick" to the O2 before as well for exactly this. We just never got around to it.

Very cool, Nick. . .your help is always appreciated!

We tried this back when we used the old SMT-6 but did not work right so we dumped it. With the MPI we have better control of the O2, both in hardware and software.


For now you will still need to keep the fuel cut under 5.0 volts.

 

[igdrasil]

We tried this back when we used the old SMT-6 but did not work right so we dumped it. With the MPI we have better control of the O2, both in hardware and software.


For now you will still need to keep the fuel cut under 5.0 volts.

FCD will solve that issue...

 

[igdrasil]

It's been awhile. I want to say the purple wire? Same wire you hook your MAF up to, I believe.

I wonder if thats the only wired needed for the MAP input if you want to see the output on all screens.

 

[Bigg Tim]

I wonder if thats the only wired needed for the MAP input if you want to see the output on all screens.

The purple wire is being used for the O2 with this wiring.