Quote:
Originally Posted by Diesel_Dave
 Um, something's wrong with your numbers. If you're running a 9:1 air-fuel ratio you'll be blowing so much smoke that your car will kill mosquitos and various other small animals as you drive down the road. For gasoline, an AFR of at least 14.7:1 is required to have enough oxygen to burn all the fuel.
Most gasoline cars run at almost exactly 14.7:1. The exception is lean-burn engines which go a little higher. Diesels run higher and much more varied AFR's from 16:1 or so all the way up to 50:1 or more in some cases (like idle). |
No, I was being quite literal with those figures. Here is just one reference to stock AFR between 9-10:1.
SoCalEvo.net: Almost Stock Evo X: +37 hp & +29 ft-lb