Thread: Prepping for MAP conversion

What really ticks me off is when I tune an area in my cruise either lean it or rich it the next day I gotta redo it.. an this is using the iat correction and no closed loop lol..


I been using the file u sent where u disabled the timers or some crap for closed loop and sometimes its bang on while others ot really has to hunt to get the afr settled it just goes really lean an then really rich, mostley at idle or low rpm low load driving.

Sorry for your troubles with Map.....but are there any real world benefits of going with map over maf????

Oh no worries im learning as I go

Benifits would be not having to recirc the bov thus easier intake routing

Even if you stay mag though I still recommend getting a map and iat sensor just so you can log boost and intake temps. That makes tuning soo much easier even on a maf..

As cool as an open-air BOV is, recirculating has been shown to increase throttle response as well as throttle tip in.

Also, you CAN run a boost control solenoid in conjunction with the MAF and still get the same benefits of running a speed density based setup. It's the factory setup on Evos and STIs. So in all honesty, if MAF is something you can more wrap your head around, installing a MAC boost control solenoid in conjunction and tuning from there is just as beneficial as using a Speed Density setup, Where the limitations come in are

1) To correlate TP to a physical quantity is somewhat difficult if you simply do not grasp the NISSAN ecu language
2) The MAF housing is a physical limitation, in respect to size/volume for airflow once you get into the higher numbers (however, old school Skyline guys used to use a dual MAF setup with the big singles)

On the other hand, formulating the correct IAT correction factors can be quite the task (as seen in this thread) and depending on weather conditions, can throw the tuner for a loop if the factors are off by too much either way. In contrast, this inability to tie down the IAT offset factors can cause severel amounts of headache.

At the end of the day, it's all what you personally prefer as one is not better than the other

Oh I forgot about boost control and boost by gear..

What im tryin to do is get the idle and crusie both perfect but its really fighting me.. im lucky to get 20mpg driving super conservatively while my wifes stupid VVL g20 using stock ecu an runs like crap gets 25-28mpg
On maf I get about 25mpg if I drive real nice, on nistune I got almost 30.. not sure wtf is up with all that (yes I've replaced tune up stuff)

I wish more people would try going with speed density also so we can maybe figure this shit out together... I know there are some guys out there running on it but most of them were pronably done by john lol

Would be nice if John made a how to video using the gm AIT and Honda map sensor or omni power map sensor. How to video would be mad helpful. I got everything I need to wire mine up including a custom intake made with bung for AIT but these issues keep me going in the maf route.

LG G2

@shingouki1 ...........Or you can just read John's instructions, wire it up, mess with it and ask John informative questions instead of getting spoon fed

In all honesty, its a sensor, which takes in a voltage based off temperature drop and spits it out to the ECU/Nismotronic software. Factor in correction factors and that should get you started. Don't be scared throwing the IAT in as you can still run the MAF inline with the sensor so if you cannot come to grips with the speed density setup, you can still run, drive, tune, whatever without it causing an issue

Ive been running SD with AEM for a few years now; my MPGs back with the 5 speed were 25-27 highway without an O2 sensor, and now with the 6 speed (and O2 feedback) I get 36-38 highway.

@Boostlee I have read the instruction and am ready to go. But seeing lynch and other have continuous issues (which I'm sure they will figure out) doest mean I want to be spoon fed. Just means I dont have time for trial and error as tuning isn't free. If it were aem ems I would have no reservations in doing the conversion as it seems to be a "set it and forget it" sort of deal.

John is always good about answering even the questions I have. If I lived close enough to have john do it personally I think I would of been map long ago.

LG G2