Wideband guys

[jbsupra89t]

Hey,

I'll be heading to the dyno soon, but I just DLed the Techedge software and was curious to try out the logging feature. Anyone ever tune (using logging in conjunction with whatever else you might use to tweak the a/f) on the street, kinda like a "coarse" tune just for some driveability, as opposed to the "fine" tune you get spending time on a dyno. The car is great now, I'm just wondering if I would be ill advised to try messing with it on the street. The ONLY reason I'd rather try it on the street is because it's more of a real world load setting, meaning I've seen guys pull a certain A/F on a dynojet, then once on the street it leans itself out a few tenths (from what I hear, mustang dynos compensate for this...?) If anyone has any feedback or even corrections for my flawed logic, feel free to shoot it over. Thanks!

-J

 

[dbsupra90]

yes a/f street vs a/f dyno will be different because of loading. will run leaner on the street, thats why most go w/ 11.7-11.8 on the dyno. that will equate to ~12:1 on the street. yes a mustang dyno can vary load and "simulate" road loading, but still not exactly the same because you dont have the same airflow across the ic.
you can street tune to get it close, then fine tune on the dyno. if your a/f is that screwy then its a good idea. if it isnt too bad i'd just wait til the dyno.
so, a/f not too bad, wait for the dyno. if its got a lot of room to get close, do some street tuning to get it closer. if you run on dynojet, tune for 11.7-11.8. if you tune on a mustang dyno w/ loading, can tune 12-12.1. every car is different, but on my car it kept making power til 12.3:1 then started to fall off.
good luck!

dave

 

[jbsupra89t]

Sweet thanks for the insight, much appreciated.

-J