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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djway |
Oct 10 2019, 02:53 PM
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#2
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Senior Member Group: Members Posts: 787 Joined: 16-October 15 From: Riverside Member No.: 19,266 Region Association: Southern California |
Have you checked the condition of your potentiometer. Partial throttle going lien tells me it is not adding additional fuel so the question is why. The flap could be sticky or the potentiometer is not giving a good signal at partial throttle. Lean at idle should not be that bad. I have read about guys trying to get above 15 on the freeway. Heat becomes a problem when lean but unless you’re at idle for long periods of time I would not think that would be a problem.
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rbzymek |
Oct 10 2019, 04:41 PM
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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 |
Have you checked the condition of your potentiometer. Partial throttle going lien tells me it is not adding additional fuel so the question is why. The flap could be sticky or the potentiometer is not giving a good signal at partial throttle. Lean at idle should not be that bad. I have read about guys trying to get above 15 on the freeway. Heat becomes a problem when lean but unless you’re at idle for long periods of time I would not think that would be a problem. It actually goes rich at part throttle. I just checked to AFM voltage output and it appears to be a smooth progression. |
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