View Single Post
Old 01-28-2011, 05:02 PM   #27
Brad Roberts
Registered User
 
Brad Roberts's Avatar
 
Join Date: Aug 2004
Location: Alta Loma, CA
Posts: 1,334
Very interesting!


I safety wire the second set of 02's under the car so they can read "fresh air". Never throws a light. The secondary 02's do not effect the tune of the car and are only looking for cat efficiency (as stated above)

I have done this 20-30 times on the 2.5 race cars running the 5.2 ecu and the 7.2 cars (2.7/3.2)

The later 7.8_40 (997/987) does not like this. Porsche actually dumps a ton of full into the system to see if the secondary 02's exist in the system and throw the CEL if they do need read the predetermined amount of fuel. Porsche does this during normal freeway steady state cruisng


B
__________________
Engine Builds, Transmission Builds, Engine Conversions, Suspension Installs, Suspension Tuning, Driver Coaching, Data Acquisition, Video, SCCA/PCA/POC/NASA/GRAND AM/ALMS.
We have worked with amateur and professional drivers for over 26 years. In house machinist, In house fabrication. Our cars, our parts, our engines, our transmission's run nationwide at events every weekend. We work side by side with industry names developing parts.
Brad Roberts is offline   Reply With Quote