Air/Fuel ratio, is there a quick answer? |
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Air/Fuel ratio, is there a quick answer? |
malcolm2 |
Feb 5 2017, 05:50 PM
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#1
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
OK, I have been tinkering with the new-to-me AFM on my 1911cc engine all weekend. I have adjusted the spring about 20 teeth CCW to get to this point.
I have been using an A/F sensor and gauge. can someone tell me, or direct me to a chart/table of what A/F I should be shooting for on my daily driver. The last adjustment of the CO screw has left me here: I have always had a strange idle situation, so lets ignore that for now. any normal adjustments to reduce the idle at normal operating temp eventually stall the car. A problem for another post. (IMG:style_emoticons/default/blink.gif) the idle is high.... at 1200 the A/F is a smooth 12.2. I found a long hill and drove up it at about 3800 rpm and the A/F was 12.5. thoughts? |
malcolm2 |
Feb 24 2017, 10:14 AM
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#2
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
No adjustments or significant changes to the readings:
3200 & 70 mph 12.5 - 13.4 WOT 13.2 HILLS 12.8 I have run 2 tanks of fuel thru the car while using and tinkering with the AFR. I have been getting just over 25.3 MPG. no special gas, just 87 oct, e-10. Looking back at some notes from 2016 with the OLD, now bent, AFM I averaged a bit over 22 mpg driving to work for a week. So fixing some vacuum leaks, replacing and adjusting the AFM have gotten me a few extra mpg on daily drives, but it is early. Looking forward to burning a tank on the interstate. (IMG:style_emoticons/default/driving-girl.gif) |
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