Got UpRev with ARC features during the Black Friday sales and finally decided to flash the ECU with the Osiris tune. While data logging I noticed that my a/f mixture is constantly around 14.0-14.7 and at WOT it’s around 13.2-13.8. I wanted to know if this is normal? My upgrades are only stillen gen 3 and z1 tp’s. By the way I am NOT tuned yet. I still have more upgrades to do.

 

Definitely not normal. You need a tune. Your running lean.
I too am in the same boat with just test pipes. Waiting on my uprev software.

 

😩😩😩 Do you know the normal a/f mixture? Something tells me it’s around the 12’s.

 

NA. should be somewhere in the 12 ish WOT Could be wrong but that's what I've seen.

 

Steady-state throttle should yield 14.7± as that's stoichiometric ratio.

Full-throttle should be be no leaner than 12.5:1.

 

Well that gives me hope. I’m just glad that I’m not way off given the upgrades. I believe the intakes are what’s making it run leaner. I was trying to wait and get an FI exhaust but I don’t believe that would be smart. Any thoughts?

 

It's my opinion that you can live without the tune until the exhaust as long as you keep your foot out of the throttle.