AFR's at idle

Rotary Evolution · 03-02-2011, 12:57 AM

there is no target AFR for idle.

plain and simply adjust the idle until the idle starts to surge and then richen it up a tad. tap the throttle a few times to make sure the engine doesn't want to stall out when it sets down to idle, if it does richen it up a tad more.

that's all.. you don't even need a wideband to tune a car out of boost.

going based off of AFRs doesn't mean your wideband is even accurate, it may give you an idea if it is not however. most rotary engines will struggle to idle when going much leaner than 13.8:1 on my wideband.

RETed · 03-02-2011, 08:09 AM

Leaning out the idle isn't going to get you that much gain in your gas mileage...
Unless you sit in your car all day just idling, you might pick up 1 or 2mpg tops.

-Ted

03-02-2011, 12:57 AM	#1
Rotary Evolution rotaryevolution.net Join Date: Feb 2011 Location: Las Vegas, NV Posts: 248 Rep Power: 15	there is no target AFR for idle. plain and simply adjust the idle until the idle starts to surge and then richen it up a tad. tap the throttle a few times to make sure the engine doesn't want to stall out when it sets down to idle, if it does richen it up a tad more. that's all.. you don't even need a wideband to tune a car out of boost. going based off of AFRs doesn't mean your wideband is even accurate, it may give you an idea if it is not however. most rotary engines will struggle to idle when going much leaner than 13.8:1 on my wideband. Last edited by Rotary Evolution; 03-02-2011 at 12:59 AM.