Thread: Cheap HP chips?
View Single Post
Old Nov 20, 2007 | 06:29 AM
  #5 (permalink)  
Cincinnati Slim's Avatar
Cincinnati Slim
Forum Regular
Joined: Mar 2007
Posts: 434
Likes: 0
From: Cincinnati
Default Re: Cheap HP chips?
We've been down this road before. There are previous threads regarding these.
The Bosch ECU in the Crossfire is pretty sophisticated and adaptable. It will try and maintain a fairly lean 14.7:1 AFR under most conditions. These resistors cause the air temp sensor to tell the ECU that it is cooler than it really is. So for a while, the ECU will run richer. But after enought time in "closed loop mode" the O2 sensors will sniff out the over-rich condition and bring the AFR right back to where is was. After enough start/run cycles the ECU will think the Temp sensor is bad/out of spec and probably "throw a code" and light the dreaded "Check Engine" light.

But for a really short term use, like a few runs at the local dragstrip or a Auto-X event on a hot day, You might actually pick up a little extra power in the short term.

But I'd be willing to bet that after 15-20 miles of normal "closed loop" non WOT driving the ECU would simply adapt and You'd be right back where you started.

Slim
 
Reply
0