What is the Best Ecu for the Crossfire?
I found two Renntech or Upsolute (Rumor has that the Upsolute chip is a serious Con, Is this true???)

 

Upsolute is not a con, although I think that some have said that some of the distributors are questionable as to their ability to correctly "install" the chip. (I am not sure if they re-flash the ECU, either through the computer module's connector or by de-soldering it from the board-or even if that is what they do). I had no problem with mine.

The other choice is Powerchip.

The issue I had in going with the ECU upgrade is that here in Phoenix, the highest grade of gas is only 91. This was not a problem as long as the outside air temp was below about 70 degrees, which is only about 5 months out of the year. The other 7 months, the motor pinged. The warmer it got, the more it pinged. In the heat of summer with the A/C on, it pinged like crazy! But the car is faster with the chip...

 

Hey, just out of curiosity, where did you get your chip done and what was the cost?

 

if you go to the engine and exhaust section, you will witness the controversy with upsolute taking place...the vendor has yet to provide a dyno...and until they do i say PROTEST...no reason to believe renntech is any different.

 

Powerchip is the same as Upsolute except that you have to send your ECU by mail and have it done in their facility rather than in the reps garage (Upsolute). Both don't have dyno's of the chip in a Crossfire!

 

I think that the reason you won't see any published power graphs for performance chips on N/A cars in general is that the power gains are very modest and are unlikely to impress. However, that is not to say they are a 'rip off'. What these remapped chips can do is produce improvements in response and 'drivability' by altering the way in which the power is delivered - usually giving better torque in the lower to mid range where we all do most of our 'real world' driving. The remapper can do this by optimizing the fueling and ignition advance without having to worry about producing the good economy and emissions figures that the manufacturer had to. This will generally make the car feel more responsive and powerful but the absolute power gains will be small. I think the cost of these chips is still pretty reasonable for what they offer.

But the bottom line is that if you want more power you are going to have to alter something that increases airflow, like head/valve work and then remap the ecu to increase the fuelling accordingly.

One thing that specifically relates to the Crossfire is the variable length inlet tract system. I don't know if any of the chip companies play with this or not, but altering the way that the system switches between the long and short inlet runners would certainly alter the torque characteristics.

Just my .02's worth...

Simon.

 

I found that the Upsolute increased my mileage by around 2 mpg. Powerchip would do the same.

This of course only if you keep your foot out of the gas...