Thread: Nismotronic SA map tuning.

Has anyone messed with this much? I am pretty familiar with calums rt and tunercode. But, I just picked up an nx that has been converted over to gm 3bar map and I am waiting for the IAT to come in so I can install it. Any input on tuning this type of setup would be great. Thanks in advance.

Who was it tuned by I wonder? To my knowledge not a lot of us have messed with that stuff much.. if john tuned it id bring it back to him to tune again with the iat.

If you look in the nismotronic section here on the forum theres a thread by me stickied on my adventures. . Be sure to read it all to learn from my mistakes lol

It has a base map for the setup that was given to the original owner by JKtuning. I'll take a look at your thread and see what I can figure out. I just need safe tune on low boost before I get it in a dyno.

I've been running on a Omnibar 3bar Map for the last 3 weeks. The car has been more been driving pretty well overall. The biggest issue I had was I tried to tune my fuel map the same way I you tune a MAF fuel map. Big no no! I picked up one of the hybrid MAP base tunes and built on that, and car runs as good as it did with MAF (minus inconsistent AFR's with temperatures I was getting with the map!) Also I'm running without an IAT at the moment, so that's not a must to get the car running!

Lol does the car run an drive as is?

Without knowing how correct for air temps I havent been playin with map at all lately..

Without using the iat I will go from perfect afr when warm to lean when air is cold then if I correct on that my afr is rich when warm again.. real pita lol..

I dont really understand the iat tables very well, an I haven't had time to play with it lately..

One things for certain, the help section could definitely use some.more info on this lol

Lynch, can you post the values you had when your compares voltage to temp. Also, when you were doing this, did you have the 5k resistor in place? and at what points were you making your measurements?

say what?

i am using a 4.7k resistor..

if your using a gm iat i can probably just show u my values an u can enter em in..

but really u should get a harborfreight digital thermometer..

cut the lid off a pop can an put ice water in it, stick the sensor and thermometer in the ice water an watch the temps, then just enter the temps your seeing @ the voltage your seeing.. u can use a propane torch to start warming the water but do it little bits at a time so u dont lose resolution.. then once the water is ambient temp take the sensor and thermometer out and use the torch to boil the water in the can then stick them back in, this time the water will be cooling down, just sit there an enter the temps as u go.. pretty simple really..

Which ever resistor you are using. Basically, when you have the 5k resistor, (or 4.7k) you will not see a solid 5v across the IAT at max resistance. When you measure the voltage across the IAT you need to do it before the IAT and at ground. Measuring across the whole circuit will tell you the sum of the voltages across both resistors. In this case, the ecu uses the voltage across the IAT only, and that is what you need to measure voltage across.

you lost me...


you can see the raw adc voltage in nismotronic.. sooo... ya...

Oh, ok. I didn't know that.