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#1 |
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Location: Southeast Michigan
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What is hard to understand , is usually when your on the two step the O2 sensor is faked out , and will read very lean . This is because the two step interrupts the ignition which means some cylinders don't fire and the air passes right through the engine , and the O2 sensor reads that as excess O2 and therefore lean . Yours is reading rich , which is opposite from what I would expect . You may want to make a run without running the two step and compare the results .
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#2 |
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I firmly agree you have too much main jet. I think you should change the primary jets to # 68, then evaluate.
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#3 | |
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#4 | |
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Location: Southeast Michigan
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In a production car , when the engine misfires the O2 sensor reads lean , and then starts to add more fuel to correct . Most production calibrations will only allow so much correction , and once it reaches that limit , it sets a code . A misfire is similar to what a two step does only more controlled . I am surprised your engine reads rich when on the two step . Hopefully a few more folks will chime in with their experiences . As far as running as big a jet with no rods , I agree , too big , but remember that this particular carb has the POE system , which adds even more fuel into the primaries at WOT . He might have to put a very small primary jet , or reinstall the power piston and primary rods . |
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#5 | |
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Last edited by gsa612; 08-28-2018 at 10:50 PM. |
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#6 |
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Join Date: Aug 2017
Location: sweden
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when on the 2 step afr is 18-19 but afterreleasing the 2 step afr goes from 10.5-12 just before shifting to second gear. poe system blockt. best 60 foot 1.39 best et 10.69 in e/sa should change to 69 pri jet for the next race and but a gopro camera under the hood over the carburator.
Last edited by gearhead63; 08-29-2018 at 03:37 AM. |
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#7 | |
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#8 |
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Join Date: Aug 2017
Location: sweden
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it likes 36-37 degrees best but we are using vp motorsport 109 are not allowed to use leaded fuel here in Europe. our goal is go 1.1sek under index to be a little faster than the other e/sa cars here.
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#9 |
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the track were we ran 10.69 is 682 ft over sea level and we had 1700 ft of air.
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