Hi Guys. I'm a new poster to the boards (I've been a big troll til I got my evo) but anyways....

I was considering getting a UTEC, but I was wondering how much temperature variance one map could handle? I live in PA, so it's like 90 in the summers and 10 in the winters, so would I need a ton of different maps? Or would I just be better off with a more agressive map for the warmer weather and just let the stock ecu handle things in the winter? Thanks.

 

There is a couple things you could do. You could build an aggressive map for both conditions and change between them. Or you could just switch it back to map zero(pass through) for the winter. But I don't think youll see problems from a summer map in the winter because the intake charge is going to be colder and less prone to knock.

Ben

 

Actually, the biggest issue is Boost control.. The fuel and timing maps are relative to air density (MAF reading) therefore if you get the MAP sensor you can use closed loop boost control. With closed loop boost, you will no longer have any variance in boost since it uses a target boost and not duty cycle.

Once the car has warmed up to operating tempurature, only airflow and density with relation to boost is relevent. So your fuel and timing won't require any changes.

You *CAN* then run an alternate map for other reasons to take advantage of the cooler denser air, however..

 

Thanks a lot guys, that's what I was wondering