Quote:
Originally Posted by JohnnyGrey
You'll probably see great gains from keeping your turbo's wastegate open during lean cruise. You can open that throttle wider while relieving the exhaust path.
I'm running a closed loop 17.4:1 ratio right now and it's working out pretty well. No pinging to speak of and power delivery is smooth enough. I'm using an AEM wideband gauge with some custom circuitry to lie to the ECU. I can train the ECU around two different variable AFRs with the flick of a switch.
Don't worry about the emissions. Even during lean burn, your 2.0L will produce fewer NOX compounds than your average V6 family car. If you look at total NOX compounds produced instead of PPM, they're rather low.
|
Apparently the lean ping is more of a myth
From an aviation website
Pelican's Perch #43:<br>Detonation Myths
I figure they should be a good source concerning mixture since they tend to adjust it on the fly.
Understanding compression on a pump gas street motor - Engine Masters
The popular hot rodding article has quite a bit of good information, somewhere on the site they have a good article on mixture as well that confirms the avweb website's statement about leaner than stoch reduces pinging, as does richer.