cobalt

AFR's are throttle dependent. Just cruising little to no throttle the car runs lean around 14.5 Of course the IYFGauges are constantly changing as they are not time delayed and are actual values which are not as constant as an EFI system. If I am at 3000 rpms and step on the gas hard it turns rich between 10.4 and 11.1 until it builds up in boost and the RPM range and then stabilizes around 12.0. If I downshift and punch it usually I see a solid 12.0 This type of driving shows the most stable readout some minor variations but pretty constant overall. I am running a HF K27 and I am not running an adjustable WUR.

turboholic

Thanks for the info Anthony.
13.0 AFR seems a little lean at full boost and higher rpm, shouldnt it be at low 12.0 AFR range??
When I punch it, AFRs first drop to 10.3 (pig-rich) and then quickly rise to 11.5 to maximum 12.1 thats pretty rich and I´m on the safe side @ 1bar of boost.
I dont run any adjustable WUR either.

cobalt

Wow you are correct. Shift all numbers down 13 should be 12 and 11 should be 10. Although the 14 is correct. I was talking to someone about the AFR's on my 928 earlier and that runs at 13 solid across the entire range until it hits 5500 rpms and then drops to 12.5. I will adjust the post to read correctly I was focusing more on the fractional part of the number and not on the primary number. The car was set rich to be safe.

One of the issues of owning too many cars and trying to keep all the different info in my head.

Francisco Martinez

Anthony, going back on your answer that a "tune" was key to getting the 380+ rwhp. This is exactly the info I am looking for, I have a Zeitronix and access to a Dyno should need be, what adjustments can be made per the "tune" you have referenced? Are we talking about adjusting the CO? I think this is the only tunable thing on the car without adding an Adjustable WUR and Solenoid, or am I wrong? Is there anything else? And what procedure was followed, disconnect the O2 sensor and adjust the CO? Please guide me...this may be obvious to others but I have not found any procedure to go about tuning the car on the dyno other than the disconnect the O2 and set the CO to 3%.

Thanks in advanced.