Piggyback installed

[Kooldino]

Cool. ..8 psi. . .no lean spots? Works like a champ?

So far so good, just a tad rich (mid 11's)

So, what about my question on determining load based upon the MAF. You can do it right? Why wouldn't you be able to do this.

Quite possibly. SO LONG AS the piggy gets the proper signal BEFORE it is clamped. I don't know if it "bottoms out" too early though.

Obviously given the ideal gas law, you have a known pressure, volume, and temperature. . .then you know how much air is coming in, which means you know how much fuel to add. . .and you know THE LOAD.

Sort of. I mean, redline OFF of boost at half throttle may have the same amount of air flow as full boost @ WOT @ 3500rpm, no? See where I'm going here? Dunno if it really works like that or not.

 

[BlueMP5Dave]

Good luck with this Kooldino it looks like you have entered a hole new world with your car. Definitely finally be able to tune. Once you street tune and get everything with the MAF and MAP worked out proper, Are you going to hit a dyno?

 

[Kooldino]

Good luck with this Kooldino it looks like you have entered a hole new world with your car. Definitely finally be able to tune. Once you street tune and get everything with the MAF and MAP worked out proper, Are you going to hit a dyno?

Possibly...if there's some kind of group dyno day. hMmm.

 

[BlueMP5Dave]

I was thinking about it, I think I would be just happy with a smooth running street tuned machine that pulls hard through all gears and isn't going to go bomb. Dyno's are mostly for status just to say look what I did. Rather be go than show.

 

[Kooldino]

Well, dynos are also good for getting more power...via proper tuning.

 

[BlueMP5Dave]

Good point and good luck with your project. Thanks for all the indepth info you guys are providing.

 

[70]

Well, dynos are also good for getting more power...via proper tuning.

But you need to tune on the street to cover all conditons the car might encounter.

Simply dyno testing won't do that.

I'm curious about the statement made by MPNick:

I could see how it sucks. He can now dial in his air fuel ratio as he needs to. He can retard the timing as he needs. His car starts and runs like stock until he hits boost, then the air fuel is perfect. All of the stock things still work because the stock computer is still installed. Installed in a few hours and tuned it right in. He only saved around $1,000.00 by not going with a standalone system.

Yes, life must suck now for him.



Thanks again


Later.....Nick

Like the sarcasm there buddy.

 

[YP5 Toronto]

I wasn't impressed with the level of professionalism either...espesically from someone that makes this type of information/communication part of his business.

 

[70]

I wasn't impressed with the level of professionalism either...espesically from someone that makes this type of information/communication part of his business.

Agreed...

 

[KzA]

I thinkk Nick just gets frustrated that no matter who comes on here saying that the piggyback works and works well, everyone seems to be ridiculously skeptical for some reason..

 

[70]

I thinkk Nick just gets frustrated that no matter who comes on here saying that the piggyback works and works well, everyone seems to be ridiculously skeptical for some reason..

I can understand that, but does he understand the reason why people think his system is skeptical.

There was a solid discussion going in the other thread and Nick just left it.

He refused to answer questions with th einformation people were asking for. Is that so hard?

I'm sure the MPI Tuner works just fine. That's great. My problem is that it doesn't seem to work in the manner he says it does, and he won't explain why...

 

[PaulMP3]

Possibly...if there's some kind of group dyno day. hMmm.

I would be down for this....


Also MPNICK can you explain the limitaions of using a MAP sensor in conjuction with the MPI tuner??????????????

 

[perfworks]

Right, but once the new MAF is tuned, your right back where Beavis is asking...

PS - i'm @ 8psi now.

Actually Dana we are not. It calibrates the output signal. So we are back to what i said about the input from the new MAF not being to scale with the stock unit or parameters

 

[KzA]

Nick..You ran 18 psi in your car at one time..And you never blew it up or had detonation...how did you tune yours to work? That would prally help alot of these people understand..

 

[perfworks]

I thinkk Nick just gets frustrated that no matter who comes on here saying that the piggyback works and works well, everyone seems to be ridiculously skeptical for some reason..

Maybe i can shed some light here KZA.
It is not that ANYONE is skeptical of the piggyback functioning. It is the responce from the stock ecu and his choice of words on the subject.
You cannot control the stock injectors. You CAN effect A/F ratio. There is a difference. The system will not support larger injectors on this ecu. If someone would like to prove me wrong then add the larger injectors on the rail and lets see. The reason why they wont idle "well" is because they cant be compensated enough with just the MAF signal manipulated. This is fact dude. Now to say with extra injectors you will have a fairly well enriched system , then i can agree. The other limitation is ignition advance. It will and can only retard a maximum of 8 degrees total. Personally i think its plenty.
People have to stop assuming that i or anyone is bashing the product. You are all protective over it because you have it installed in your vehicle. I would too. But as a consumer they have the right to know how it works.
You cant claim to control the stock injectors when you dont. Also the question was asked IF you can control both the stock O2 and MAF. Not one or the other but enough drivers to control both in the cycle.
Start with these questions and we will go from there.

 

[perfworks]

Nick..You ran 18 psi in your car at one time..And you never blew it up or had detonation...how did you tune yours to work? That would prally help alot of these people understand..

Yup and that setup kooldino will use in his car.
The map was used to "switch" the injectors on and off. The higher the boost the higher the duty cycle i would calculate. I used the stock narrow band sensor. It wasnt too accurate. I ran the 18psi rarely. Just to see how she felt. 10-14 everday. Power on demand basically.She was dialed in at 14 and depending on the throttle given she would respond.
If anyone wants to go into specifics i would be more than happy to.

 

[Little Beavis]

Sort of. I mean, redline OFF of boost at half throttle may have the same amount of air flow as full boost @ WOT @ 3500rpm, no? See where I'm going here? Dunno if it really works like that or not.

Those are different parts of the injector map are they not? You can change fuel by rpm. I'm not seeing the problem. It might be there, I don't know, but I would not think it would be an issue. Time will tell. . .time to figure this out!

 

[FSRbikr98]

quick question

So far i've read just about every post about hte MPI tuner, and have a question that i hope someone can clarify for me. I see that the tuner uses an 80mm MAF. Since the voltage still has to be clamped to 4.98 volts for the stock ecu, how exactly do u tune the extra injectors. Does the tuner read more then the 5.0v from the new maf, but only alows the ecu to see 4.98 volts and then u can add more fuel via the extra injectors? hmmm. confused......

 

[Kooldino]

I would be down for this....


Also MPNICK can you explain the limitaions of using a MAP sensor in conjuction with the MPI tuner??????????????

Hmm, I'll start a thread and try to gauge some interest...

 

[Kooldino]

Actually Dana we are not. It calibrates the output signal. So we are back to what i said about the input from the new MAF not being to scale with the stock unit or parameters

Right, but assuming you worked it out so it was calibrated correctly...