Would appreciate some tuning advice for new 2056, Having trouble dialing in the AFR |
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Would appreciate some tuning advice for new 2056, Having trouble dialing in the AFR |
rbzymek |
Oct 6 2019, 09:02 AM
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#1
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Member Group: Members Posts: 195 Joined: 5-April 19 From: Northville, MI Member No.: 23,013 Region Association: Upper MidWest |
So I replaced the 1.8L with a SCAT 2056 long block with a Web 73 cam and 42x38 valves. They provided 4 bolt (intake) heads so I could use the 1.8 tin and carry over L-Jet system. The CR is 8.5 and I have an adjustable FPR. The injectors are stock 1.8L L-Ject. I can dial in the idle AFR easily but I get rich 9.0 AFR on very light tip in. I also go lean at higher speeds (>4000). I suspect the static is set too high on the AFM. Any suggestions?
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914forme |
Oct 6 2019, 09:20 AM
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#2
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Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None |
Switch to Megasquirt, HalTec, AEM, SDS........... (IMG:style_emoticons/default/confused24.gif) you're expecting a lot from a system designed when it was. Can it be cleaned up, sure, is it worth spending huge amounts of time, nope.
Issue is your testing ancient technology with Modren tools and expecting Modren near perfect out comes. To get that you need a processor and data maps beyond what transistors and diodes with resistor can provide. (IMG:style_emoticons/default/dead horse.gif) |
rbzymek |
Oct 6 2019, 11:32 AM
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#3
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Member Group: Members Posts: 195 Joined: 5-April 19 From: Northville, MI Member No.: 23,013 Region Association: Upper MidWest |
Switch to Megasquirt, HalTec, AEM, SDS........... (IMG:style_emoticons/default/confused24.gif) you're expecting a lot from a system designed when it was. Can it be cleaned up, sure, is it worth spending huge amounts of time, nope. Issue is your testing ancient technology with Modren tools and expecting Modren near perfect out comes. To get that you need a processor and data maps beyond what transistors and diodes with resistor can provide. (IMG:style_emoticons/default/dead horse.gif) Stephen, I think with the L-Jet knobs at hand (fuel pressure, AFM static, AFM dynamic and CHT resistor adder if needed) I should be able to arrive at a safe calibration. Like 12.5-13.2 moderate load, maybe 12.0-12.5 WOT and 13.2-13.5 at idle. I think I will start with WOT calibration since that will determine my fuel pressure needed with the 1.8L injectors. Then I can adjust for moderate load and idle. |
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