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Old 04-18-2009, 07:51 AM   #11
blue2000s
Porscheectomy
 
Join Date: Mar 2006
Location: Seattle Area
Posts: 3,011
Quote:
Originally Posted by jhandy
Air fuel was a little rich actually. I attached the printout.

To those who know this kind of thing,
Why did I loose HP and Torque in the middle, The dyno guy said that it was because it was running rich and told me to replace the 02 sensors, and that might help.
Can you rescan that so the scale shows?

If I were to venture a guess at your AFR plot, I'd say that either the stock map gets rich at high RPM/load for longevity (which is likely) or the exhaust mods have altered VE enough that the DME isn't metering correctly anymore. Either way, the car should be tuned if you want to really make the most power.

Oxygen sensors are only used at low loads and under steady state. They won't effect the AFR at WOT.

The dip in torque looks like the change-over point for the varioram system to me. It looks alot like 944boy's dyno run.

http://986forum.com/forums/attachment.php?attachmentid=9781

Last edited by blue2000s; 04-18-2009 at 08:04 AM.
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