here are my AFR graphs from Innovate; opinions wanted

Mike Mercury · 06-27-2004, 05:25 PM

From my new Innovate LM-1 AFR meter (thanks to Phil).

These were short runs:

WOT started at the 6 second mark:

and:

looks like I'm rich ???

gojo · 06-27-2004, 07:37 PM

Mike,
It does look rich. You have an A4 right? You should do your WOT runs in 3rd gear as you would on a dyno. If these are not in 3rd I'd be curious to see a comparison.
Nice clean graphs with that setup.

itsonlyairandfuel · 06-27-2004, 08:47 PM

What are your factory O2 sensors reading at these levels?

Mike Mercury · 06-27-2004, 11:41 PM

Quote:

What are your factory O2 sensors reading at these levels?

I don't have a clue. I've ignored the factory sensors since they're not wideband anyways.

Automag928 · 06-28-2004, 01:43 PM

Were these runs on the street or dyno (if dyno - which one?) A dynojet doesnt put the load on a car like a mustang dyno or running on the street would. If you ran that on the street you are defintely runnin a tad rich. I'd feel comfortable with 12.5-12.6:1 but nothing past that. Not worth the few extra HP you would get to lean it out more IMHO...

Umrswimr · 06-28-2004, 02:24 PM

Is the second one AFR vs RPM or time?

Either way, I'd say you were a little on the rich side. AFAIK, most people tend to tune for 12.8 at WOT.

Mike Mercury · 06-28-2004, 03:04 PM

these are on-the-street runs.

The graph is capable of showing RPM, but I don't have the RPM input to the LM-1 unit... yet. SO right now it shows AFR only - over a period of time

MrEracer · 06-28-2004, 07:48 PM

There are several things that you could do to improve your tune. I assume your fuel trims are near zero. If not, adjust IFR until they are. Then reduce your PE above the torque peak (pull fuel) until the graph is flat from min. to max. rpm. Once AFR is flat, reduce PE across the full rpm band to raise the AFR to 13:1 (street data, third gear, 3000 rpm to rev limit). This will give you the best power for your set-up. Good luck.
Shirl
SDRE

Mike Mercury · 06-28-2004, 08:27 PM

WOW; great specific info Mr. Eracer.

Sadly, my Predator programmer will only adjust AFR during WOT - using a fixed curve. But, I'm not an avid racer, so the Predator should give me the averages that I want.

When I can get time to altering the AFR, I'll log more runs and post the newer graphs.