Mass Air and injector mismatch

[Hef]

I bought a new set of Seimens Deka 95lb injectors as well as a used SCT BA3000. The Mass air is calibrated to 60lb injectors from previous owner. Question is when I install everything will I have to roll it on to a trailer and take it to my tuner or is there a way to half a$$ sync them enough to load it?

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[01yellercobra]

The days of MAFs being calibrated to certain sized injectors are long gone. You'll either need a start up tune from your tuner to drive it there or you'll need to trailer it.

 

[cj428mach]

Calibrated mafs and a blower is a bad idea.

 

[Hef]

School me on this, I guess I assumed even though the mass air ran with 60's from previous owner, it could be changed to run with 95's with a different tune.

 

[Blkkbgt]

School me on this, I guess I assumed even though the mass air ran with 60's from previous owner, it could be changed to run with 95's with a different tune.

The MAF itself is not calibrated to the injector size as it's in the tune. Whatever the previous owner did has nothing to do with your car. You need a base tune from whoever is tuning the car to start it up and have it run decent. Hopefully whoever is tuning the car will do that for you as I know some refuse to and will tell you to trailer the car to them.

 

[Hef]

The MAF itself is not calibrated to the injector size as it's in the tune. Whatever the previous owner did has nothing to do with your car. You need a base tune from whoever is tuning the car to start it up and have it run decent. Hopefully whoever is tuning the car will do that for you as I know some refuse to and will tell you to trailer the car to them.

Thanks, this is what I thought as well. I was confused about the calibrated MAF and blower is a bad idea. I probably should not have used the term calibrated. I will by the way be trailering my car.

 

[cj428mach]

A calibrated Maf lies about how much air is coming into the engine. Airflow is how load is calculated by the engine, load is how the ecu determines what timing and afr to command. In most cases a calibrated Maf is going to report lower airflow so load will be lower, this means the car will run leaner and with more timing.

In a boosted application that means....boom.

 

[03cobra#2]

I was in a similar spot as you a few months ago. I finished the car and the couple shops I was debating on taking it to didn't want to do a start up tune. I found a retuable guy online and had him do a start up tune for a descent price. All I wanted to do was start the car and make sure there were no leaks or anything before taking it to a shop for a dyno tune. To make a long story short, it didn't work out well and I ended up buying software to tune the car myself. Got it mostly done then took my car to a dyno shop to finish the tune. So glad I did because I now have complete control over what is going on with the car. Just figured I would share my expierence.

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[cj428mach]

I should add that you can use a calibrated MAF as long as the tuner tunes for it, and basically feeds the correct information to the ecm instead of letting it be mislead by the "calibrated" MAF.

 

[c6zhombre]

It is probably too late.....but my advice......do not buy parts until you figure out the person doing the tuning. They are the most critical part of the equation. They WILL have an opinion about what parts combo they are most comfortable tuning with, for your power goals....so you arrive at the end with a quality, safe, reliable setup. Don't just buy parts.....then search for a tuner that is willing "to take it on....". Those situations don't end well. You need a cohesive plan with a reputable tuner and buy parts accordingly.

OR.....you tackle tuning on your own. That's an entirely different enchilada.