GT35R maf readings..

MalibuJack · Aug 21, 2006, 10:04 AM

Hey, anyone running a GT35r with a stock MAF that can let me know what their MAF reading is at different RPM points (And boost level)

I'm having a hell of a time calibrating the blowthrough sensor to get consistent results..

MalibuJack · Aug 21, 2006, 10:08 AM

Any chance I'll be able to use my ford MAF and AIT with the ECU+?? This way I don't have to rely on that converter box anymore.. If the input functionality is there, I can create the calibration for it once I have more data. I don't want to have to dump that MAF I'm using and switch to a GM Maf, up here in the northeast the humidity has caused problems for me and the GM Maf in the past.

Sean@Iveytune · Aug 21, 2006, 10:13 AM

Jack this is what I was telling you.
With the bigger turbos you run into areas like peak torque etc where it is totally non intuitive as to how you have to map it.
Big part of that is overrunning the maf sensor and fixing this issue would require physical recalibration not in the SW.
You can use the Speed density conversion of the MAP ecu with the stock ecu and that works well when setup correctly.

Sean

MalibuJack · Aug 21, 2006, 10:35 AM

I'm not running a stock MAF, The load obviously reads artificially high at peak torque the way the sensor is calibrated.. Speed density isn't really an option for me (for several reasons, but I have to consider it if it becomes available for the ECU+)

I have actually gotten most of the quirks out, but I was trying to figure out what I was fighting, the sensor or my injector calibration.

MalibuJack · Aug 21, 2006, 01:36 PM

Quick update, I remapped my Blowthrough setup to match the AFR's in the fuel table on the ECU, I can now tune the car with a fair level of confidence that the number I put in, will be roughly what AFR the car will run (realistically it won't be.. But close enough to tune)

If this were a stock MAF, I'd be seriously overrunning the MAF, I am already reading over 2000hz, probably closer to 2500hz, likely will hit 3000hz by the time I hit the boost levels I want.. The ECU handles it well with it scaled to 320% It doesnt appear to go outside the highest load cells at peak torque..

I still would like to know what the stock MAF sensor hits before it starts clipping.. I know the ECU+ is capable of over 4000hz, and my blowthrough sensor is calibrated to 3500hz..