Is the target slightly different on a turbo car?

Been out in my 205 today,
out of interest hooked a Wideband up to it.

shows a steady 13.2 :1 afr when under load in 4th gear,
does that sound about right?

just wondering what would be the ideal for maximum power
on an N/A car.

 

max power is based around 12.6:1,



Do you know you AFR meter is reading correct, have you tested it against a calibrated system?

 

thanks mate!


its dont belong to me, so ive no idea if its been done,, however it is
very new so i guess it would of been done from factory?

just put it on my car out of interest more than anything,
not gonna mess with it i dont think, lol

 

There is no one ideal AFR. The ratio that produces maximum power varies from engine to engine and with rpm. Forced induction engines often run a mixture richer than necessary to provide cooling from the extra fuel.