Had my truck on the dyno for the first time last week, and it was an interesting experience, one that has given me a few things to sort out.
One unexpected question that came up was the accuracy of the SpeedPro's WBO2 sensor. The SP sensor did not agree with the WBO2 the dyno operator was using, with the SP sensor generally reading 5% richer than the shop's sensor (e.g., the shop's tailpipe-sniffing WBO2 would read 12.2, while the SP would read 11.6). FWIW, I am confident that I don't have any leaks in the exhaust between the WBO2 and the tailpipe, as the system does not have any flanged joints in that that section, and that section has recently been replaced with with new pipe. So let's assume that the problem is not related to an exhaust leak.
Is this sort of discrepency common? While I realize it could be the shop's sensor that's inaccurate, is there any way to verify the accuracy of my sensor short of sending it in? I'm starting to tune this engine in earnest, and i want to make sure I can trust the WBO2.
TIA,
Jeff
One unexpected question that came up was the accuracy of the SpeedPro's WBO2 sensor. The SP sensor did not agree with the WBO2 the dyno operator was using, with the SP sensor generally reading 5% richer than the shop's sensor (e.g., the shop's tailpipe-sniffing WBO2 would read 12.2, while the SP would read 11.6). FWIW, I am confident that I don't have any leaks in the exhaust between the WBO2 and the tailpipe, as the system does not have any flanged joints in that that section, and that section has recently been replaced with with new pipe. So let's assume that the problem is not related to an exhaust leak.
Is this sort of discrepency common? While I realize it could be the shop's sensor that's inaccurate, is there any way to verify the accuracy of my sensor short of sending it in? I'm starting to tune this engine in earnest, and i want to make sure I can trust the WBO2.
TIA,
Jeff