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? |
pete000 |
Mar 23 2017, 06:57 PM
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#2
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Senior Member Group: Members Posts: 1,885 Joined: 23-August 10 From: Bradenton Florida Member No.: 12,094 Region Association: South East States |
I have been playing around a bit with my AFM. I have a couple of them so I figured one would be a good test mule. I read about a mod the VW Bus guys were doing. The later Bosch AFMs had a jumper wire installed to help the conductivity. This is an easy upgrade to do by soldering a jumper wire from the wiper arm to the large connector bar (See blue wire). I also cleaned all the contacts while I had it apart. I did a before and after OHM test and the numbers seemed to smooth out a bit after the mod and tune up. There are You Tube videos on all of this.
Now to try to get some time to get out and test the AFR results. (IMG:style_emoticons/default/driving.gif) Attached thumbnail(s) Attached image(s) |
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