Leaner burning engines

[findRED19]

1. Search “lean” and the top number 2 result is a thread about AFR ratios, with number 5 being a fuel mixture thread as well. (number 1 is currently this thread)

2. Automation “AFR slider” is more like a moving target with carbs, and a “richening limit / Fuel amount limit” with the efi stuff.

@Daffyflyer

Honestly it’s mostly because AFR is actually a really bad way of describing it. That slider is more accurately “How agressively do you want to enrich stuff to try and always get the best power/response, or lean for the best economy”

It does represent a much more dynamic system in the case of EFI cars, and that’s kind of simulated by the much better power/economy compromise you can get with them in game.

3. Having a 15:1 or leaner AFR at WOT is a recipe for piston-melting disaster…

@Daffyflyer

Even 15:1 is so ridiculously lean for full power mixtures, you’d have a very hard time making that not explode and melt pistons etc IRL

@Slim_Jim

The mixture number in the game (that you set) is the number for “power enrichment”. The cruise number is also given and can go into the 30s if you use direct injection.

To Summarize:

Automation AFR is really just “power enrichment at WOT” and Automation does “simulate” cruise AFR being much leaner, especially with any EFI systems in game.