Mike00FRC

iTrader: (1)

If you run a tune on the street and see a flat 12.6:1 afr (LM-1) and then strap it on a Dynojet, will the afr on the dyno be leaner or richer?

I know that the load will be higher on the street, so I would think that the dyno would be richer, but I'm not sure.

Any opinions?

TILEMAN

I say richer.

red ws6 99

It should be richer because the dynojet has a lot less load than the street. Now if it was eddy current dyno (mustang, etc) then it should be fairly close.

Gary

Mike00FRC

iTrader: (1)

Thanks.

Now, is there any way to estimate the afr increase if tuning is done on a dyno, and then driving it on the street. Say, tuning it to 12.4 on a Dynojet248 and then running it at WOT on the street/track.

MYTURBOT/A

they say that you`ll be a half a point leaner on the street so if your 12.5 on the dyno youd be 13.0 on the street. but thats just what i`ve heard. but it realy depends on how the dynos set up the calibration can be made to account for the extra load on the street