Thread: 14CUX MAF IAT Sensor???

NO.
MAF (Mass Air flow ) sensors measure air mass which automatically compensates for density ie temperature.

Therefore the Haltech does not need this info on a MAF vehicle but does need it on a MAP( Manifold Absolute Pressure) sensor or flapper.

Regards Philip A

Originally Posted by PhilipA

NO.
MAF (Mass Air flow ) sensors measure air mass which automatically compensates for density ie temperature.

Therefore the Haltech does not need this info on a MAF vehicle but does need it on a MAP( Manifold Absolute Pressure) sensor or flapper.

Regards Philip A

The haltech can be further mapped to allow for variations in inlet air temp. I thought this would be good to auto lean when colder air temps are available and richen when hotter?

I really just trying to learn as much as i can about this software and basic tuning and thought seein as thou the software has the ability to change fueling and ignition percentages it may be of great benefit.

But alas, the maf has no air temp sensor so I guees that rules it out for now, Unless I fit a sensor to the manifold myself.

Cheers
Anthony

You could fit one to the air inlet of the air cleaner well away from the engine, but remember you already have correction for fuel temperature. On Motec installations I have seen the air temp sensor is at the air cleaner inlet.

I think you would have to be careful that an additional sensor did not work against others.eg the fuel temp sensor increases injector duration to compensate for reduced density of hot fuel. Although not a direct relationship generally on a hot day the fuel will be hot and vice versa.

Regards Philip A

Thansk for the info Philip, Much appreciated.

I have now moved onto the Air Fuel ratio
As I am starting to gain confidence in tuning, I am toying with the idea of mounting a A/F gauge and getting right into the maps.

All i gotta do now is learn about what oxy sensor and gauges are compatible or if there even is any incompatibility with any.

Spent a total of about 8 hours to date reading up on stuff and only just got to the a/f segment in my agenda

I am currently running a map I spent about 3 hours compiling and so far it seems pretty good, I also advanced the timing another 2 degrees, but I think I may have leaned out a small section of the fueling, hence why the gauges are high priority.

Arghh, too many variables, too much to learn, hope I don't ruin anything

Grimace,
A/F gauges usually have a wideband sensor that comes with them. The most cost effective I have found is the NGK gauge.

see Ballenger Motorsports - High Performance Electronics

I have not gone to the expense of buying one mainly because the 14CUX has a set maximum injector duration and this cannot be overridden without a chip change to a Tornado or similar. Interceptors cannot do it.

Also the 14CUX stops adding fuel over 5500?RPM Most power shown to be added by the before/after comparisons by people such as RPi are in this full throttle high rev area. How often do you drive at full throttle over 5000RPM?

Most of the performance increase you get with an interceptor with a 14CUX is from more aggressive timing.

Didn't you have your Haltech dyno tuned? If so your A/F ratio should be pretty well OK.

Regard sPhilip A