www.CVOHARLEY.com

CVO Technical => Intake/Exhaust/ECM => Topic started by: 1roadking on March 18, 2018, 12:43:02 PM

Title: AFR on my 117
Post by: 1roadking on March 18, 2018, 12:43:02 PM: Can a tuner take a look at the AFR on my dyno sheet and make any suggestions? I’ve been told it’s set up to lean for WOT.
Title: Re: AFR on my 117
Post by: hd-dude on March 19, 2018, 12:03:30 AM: Yes it has a lean area. AFR should be 12.8-13.2 for a wide open pull. You will also notice that the torque and horsepower dip slightly where it goes lean.
Title: Re: AFR on my 117
Post by: 1roadking on March 19, 2018, 08:05:37 AM: Thank you.
Title: Re: AFR on my 117
Post by: grc on March 19, 2018, 08:18:42 AM: Visual representation below. The green dashed line is the target AFR for WOT.

Jerry
Title: Re: AFR on my 117
Post by: 1roadking on March 19, 2018, 09:05:42 AM: No bueno 🤪
Title: Re: AFR on my 117
Post by: 1roadking on March 30, 2018, 05:41:07 PM: Much better now:)
Title: Re: AFR on my 117
Post by: grc on March 31, 2018, 08:59:45 AM: No AFR scale on that last chart, but at least the midrange dip on the hp and torque lines are gone. Without the AFR scale can't really tell if it's now really that good, or did they just compress the scale to make it look better. I'm guessing the latter. The important thing though is, how does it feel to your butt dyno? If you're happy with how it runs, that's the important thing. If you're still not sure, I'd suggest finding another dyno operator to just do some pulls to verify that last chart.

Jerry
Title: Re: AFR on my 117
Post by: hawgzilla on March 31, 2018, 08:31:05 PM: The dyno operator doesn’t seem to know which line is horsepower and which one is torque! I’d question the entire tune.
Title: Re: AFR on my 117
Post by: hd-dude on March 31, 2018, 11:41:07 PM: Did you question why they started this run so much later in the RPM? ~1800 originally vs. ~2700....
I'd wonder if they were hiding something going on lower in the RPM range?
Title: Re: AFR on my 117
Post by: 1roadking on April 01, 2018, 09:33:39 AM: I’m going to ride it for s while and then bring it up to a top tuner in Maine if it doesn’t feel right.