AFR Cooper S

[Alfa Veloce]

Hi guys!

I have a chip that I don't know whether was intended for use with or without pulley..

Have any of you measured the air fuel ratio on your stock/tuned car?
Can anyone tell me very short how the afr was throughout the rev-range...?

Mine was by the way 14.6 in the mid-range and dropped to 10.3 at the top (about 7000rpm) started to drop around 5000rpm..

Just wondering if the MINI's usually run this rich or if mine proberbly was supposed to have the pulley along with the chip..
(I guess the afr would be leaner if I had the pulley since the supercharger therefore would spin faster and the engine get more air... 10.3 AFR is a bit too rich for a every-day car)

I'd be happy for any opinions on the matter

[Fisher]

Yes, MINI has very rich AF.

You have some reserve with power on it.

[Alfa Veloce]

Quote: Originally Posted by Fisher (original)

Yes, MINI has very rich AF.

You have some reserve with power on it.

I know the MINI has rich afr, but 10.3??
It spits out black spots all over the rear end and the tail pipes are wet....?!

Has anyone measured the afr on your car?

[giwasa]

dont worry. it sonly to protect the engine at high rpms.

to no blow. it's better rich than lean.