Just curious....as it says up top. I noticed with the E-manage there are 900 different sensors and harnesses that would equal out to almost the price of a Stand alone.
Any input on this system would be appreciated, I have read up on it, but I would like to hear some comments from you owners.
As far as the tunability. I read up on the EMS system and was told if you don't like adjusting and playing around with it all the time then it is not for you. I would like to just have a couple different settings for different scenarious and be done with it. Of course I understand you have to retune when you add parts.
The reason I don't want a piggy back is because I'm looking at upgrading the turbo and don't see the need to spend the cash on two different systems. Thanks!

 

The only things you need with the UTEC is an afr logger (pref. a TXS tuner so it can append you log), a map sensor (great for logging boost with the UTEC), and two more very important tools Patience, and knowledge. The knowledge can be obtained right here in the UTEC forum.

You don't have to play with the UTEC all of the time, but when there is a massive weather change, it is a good idea to build a map for this change. One for hot weather, and one for cold weather (or here in Houston, one for hot weather and another for really f*cking hot weather ).

I had a good map for my setup until I changed turbos. I am still trying to develop the new map, but I am having to use on of the important tools, patience.

This forum has been very usefull for me, and I am pretty sure that it can be for you as well.

 

I'm digging up a slightly old thread here...just purchased a UTEC. Why, on a MAF-equipped car, would you need to retune based on climate? I'm used to tuning with speed density systems (L-Jetro) with no MAF but utilizing a MAP and air intake temp sensor. I always thought the MAF would compensate for air density and temperature? Also, doesn't the stock ECU have a temperature comensation table? The UTEC doesn't do away with the MAF as I understand things. Does the UTEC have a table for temp correction in relation to the fuel injection? Can someone elaborate a bit more on why our cars don't correct for temp? We have "fairly" dramatic temp changes here in Florida...it's either 93 degrees, sunny w/80% humidity or during season, between 50 and 70 with no humidity. It's enough to pop a highly tuned rotary motor without the right correction tables. Thanks in advance!
Michel

 

I think the issue is how the UTEC is set up.. If you set up the UTEC to offer enough headroom where your fuel and timing maps are targetted to hit 90% load column, then increased air density will go into the 100% column and you can compensate for it.. If your already in 100%, you can't compensate for any additional climate changes.. I always tune to generally fall into the 80-90% columns and all my maps add more fuel at the 100% range (when I refine on very cold dense days..)

 

I "think" I undestand what you're saying Jack I don't have the software or the UTEC in front of me yet to look at the different tables/maps, etc...I'm just surprised the stock MAF system itself doesn't do the compensation automatically. But as you're saying the UTEC may set limits based on the way it's used to tune.

 

Well, the MAF does compensate for air density automatically.. its the mapping of the ECU (or UTEC in this case) that can go out of range.. the MAF itself will tell you how much air is there to be used.. that will change based on temp, altitude, and humidity, the Karmann sensor reads vortices and that represents a particular volume of air, knowing the altitude (the stock baro sensor) and the air temp, you can calculate the density of the air.. but the main difference is that the sensor is a real indication of how much air the engine sees, any other method would determine this from calculations which can be in error for many reasons.

Even the stock ECU and any other ECU that uses compensation tables (or maps) will eventually see a limitation where you can no longer compensate.. The trick is to configure these maps that a majority of the tuning is done, while still leaving headroom for when things go out of range...