Okay guys got sixth fixed in my car. It was the 5/6 hub slider had went bad. Anyways I got my defective gauge back from aem. Gauge works fine it just seems a bit lean to me but I never took it high enough maybe. It's around 14.5-15 a/f at idle or just cruising. Then around 4-5k it is about 13.0. Is that lean or will it drop on down to the 11 af closer to redline? Idk how the af in the Evo's work this is my first wideband on them. I was curious what other ppls af at 5k was?

 

Around 11.3 when my gauge decides to work. Im having issues with it being stuck at 14.8 constantly and sometimes it will work, most the time its stuck at 14.8. 13 is a little too lean 12 is max I would say. And the afr should be pretty consistent once in boost it should swing down to 11s or even as low as 10 around 4k and hold to redline or taper a little

 

Okay how do you set the thing to your particular atmosphere?

 

NO..your wideband is fine. At idle any car is supposed to be at 14.7-15.5, and cruising the same thing. At 4-5k you are reading 13 which is good because it getting richer not leaner, then at WOT you should be in the 11's. When the a/f ratio number getts smaller thats rich, and opposite is lean.

 

Yea the lower the number gets the richer it is.

 

Okay I took it out earlier on 15 psi and saw 14.5-15 idle. 13-13.5 at 3-5k then about 5500 it dropped to 11.4-11.6 ish so I upped boost to 19 psi and it's the same result but the 5500 reading is about 11.8-12.0 that sound correct to you guys?

 

Yeah I know what the number means sorry of I came off stupid I just wondered where u guys where around 4k ish

 

12.0 is lean on pump gas..you'd like to keep it in the 11's

 

In what gear? It seems my air fuel gets rich from 3-4 then 4-5 etc. I'm reading like 12.2 in 3 Ed at 6500 then 11.8 at the same rpm in 4th. The tune on the car was done in Florida would me being in ky make it run leaner on that die due to atmosphere/elevation? Just curious

 

I have an AFX, says to caliberate for every 3000' altitude change. Involves removing sensor, let it hang in free air, power on, let sensor warm for 30 min., unplug senesor harness, let sensor cool, reinstall sensor, reconnect harness, power on, turn knob on back till reads CAL_.

 

Basically my question is.... The car was tuned in Miami on 23 lbs and I'm in Columbia Kentucky 800 feet higher elevation. Would it be possible for the car to run a bit lean or rich due to that change? It may be stupid but I didn't know. I personally thought it would be a little leaner maybe not drastic but .2-.3 off?? Thanks guys

 

you do not have to calibrate AEM widebands

 

yes, elevation will affect boost levels

you really should consider retuning your car for the correct elevation and gas....sure your gas might be 93 octane but no guarantee the formula is the same

 

It will affect it, however imho 12.2 at 6500 is too lean. I like to be safe than sorry I guess. As soon as u go wot it should drastically start to swing down and be mid tens to 11.5 as it approaches your set psi level in every gear.

 

what you need to do is log the car and see what kind of knock counts your getting. dont go off of the AFR