Quote:
Originally Posted by swchopper
Now you are talking in foreign languages  I did find a tuner for the Gen VI. It is a temporary fix. But I also do have quite a range of altitudes with what I do. So I'm putting in a new FAST system in 2 weeks! It looks like this may be the start of what I thought was NOT going to be a project car. But this website doesn't help. I keep finding things I want to "spruce up" or just flat out change! |
Don't bother with the new FAST XFI if you're looking for a step up when it comes to better performance over changing altitudes... because the XFI doesn't have
true real time barometric compensation feature either and it still won't run right for your particular application if you drive the car to another altitude without a power cycle! The XFI firmware pseudo-comps for altitude with a "load indexed" speed-density strategy in their new firmware. The problem is it uses the main MAP sensor and thus can only update the barometric parameters during key-on startup and WOT-- which works OK with naturally aspirated setups as it can read the WOT MAP value every time you floor it and use that for the new barometric value but with your turbos the feature is rather ineffective to say the least because at WOT it doesn't see the true prevailing barometric conditions. Thus, for your forced induction application to have it refresh the barometric value requires you to shut the car off and then restart so it can read the key-off MAP value to get the barometric conditions. It's better than no correction at all like your Gen VI but still a pain in the butt as you have to pull over, shut the car off, and then restart it.
If you drive the car over a wide range of altitudes then forget the FAST XFI, Accel Gen VII, and the other boxes that get most of the advertising time; none of them treat this condition properly!
I've never used one of Lance's 882C boxes but I do like the specs & capabilities and I'm considering upgrading my ECU to one of his; Lance uses a separate MAP sensor to get the barometric conditions (i.e. altitude) so it can comp for weather/altitude changes in real time without a key-off reset.