View Single Post
Old 01-12-2017, 11:17 PM   #25 (permalink)
pgfpro
In Lean Burn Mode
 
pgfpro's Avatar
 
Join Date: Apr 2009
Location: Pacific NW
Posts: 1,528

MisFit Talon - '91 Eagle Talon TSi
Team Turbocharged!
90 day: 39.03 mpg (US)

Warlock - '71 Chevy Camaro

Fe Eclipse - '97 Mitsubishi Eclipse GS
Thanks: 1,243
Thanked 581 Times in 373 Posts
This is a issue I had when first attempting a 25:1 + A/F. I ended building a lean burn hole in my fuel map with my desired 30:1 in the middle and a leaner value on the outer perimeter to keep the engine from hunting to get out of the lean burn hole. One other thing I found out is I could only build one preset light load lean burn value in the map, because of the space it would take up.

My heavy load 10 to 14psi would run at 20:1 A/F with no knock on pump 91 octane.

Here is a pic of a light load 53 mph 30:1 A/F. The A/F shows 18:1 because this is a AEM wide band and the max value is 18:1. The mass air an fuel show around a 30:1 A/F ratio. This screen shot is a earlier version with out my pre heat intake setup and EGR enable. I'm now running as much as 2psi at this same mph.
__________________
Pressure Gradient Force
The Positive Side of the Number Line

  Reply With Quote
The Following User Says Thank You to pgfpro For This Useful Post:
Harlan (01-13-2017)