But with that 400:1 there goes all your acceleration, and isn't that half the fun, racing from stop light to stop light?@chillman88 is spot on.
Adding to it.
Most diesels when rolling coal are actually about 18:1 afr, with normal driving in the 25-40:1 ratio, and can run as lean as 400:1
The leaner the better fuel eco
Yes I'm being sarcastic, rolling coal is just a lazy way of going fast at the cost of lots of money. Sadly I got stuck behind someone in an idi yesterday who was rolling mad coal, just to red light hop. Gives us all a bad name.