Lean idle question
#1
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From: Austin, TX
Lean idle question
Is it possible to be too lean at idle? I've always maintained an idle in the high 12s at around 1100 rpms with RC 750cc injectors and it would occasionally flip out when the fan would come on. Just never spent the time to get it right. That is until yesterday, I started to lean it out a bit and got the best idle with an afr of 17-18 at 900 rpms with my 750cc injectors. The fan would come on and it wouldn't flip out or anything. Since there isn't much load on the engine, I wouldn't think it would be a problem, but I would rather ask then risk damage.
#3
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From: Austin, TX
I usually like to keep it pretty rich overall, but I've been experimenting a bit lately. Did some pulls yesterday at 19# and had it as lean as 12.0 while I was getting it dialed in just to see the change in my injector duty cycle. It's back down to 11.5 now. I also finally installed a wideband, besides the one that the Hydra uses. Since idle and cruise is about the only time I will actually look at that thing I figured this would be a good place to start.
#6
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From: Austin, TX
The sensor on the Hydra isn't the best at low flow rates, so I'm going by what the plx sensor is telling me. I'll put in the spare sensor and see if it does anything different. I did also just change out the exhaust cam, not sure if it would affect things much, it's pretty mild.
#20
Just found all this, thanks for prompting me to look.
http://www.ideasandsolutions.biz/Meg...eAnalysis.html
Third of the way down this page, apparently I need to "Show Advanced Settings"
Rock on!
http://www.ideasandsolutions.biz/Meg...eAnalysis.html
Third of the way down this page, apparently I need to "Show Advanced Settings"
Rock on!