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General Minitrail Talk
Tech Area
tuning challenge - off throttle issues
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<blockquote data-quote="69ST" data-source="post: 171699" data-attributes="member: 5"><p>Just to be clear here...I'm talking about taking the idle A:F mixture into pig-rich territory, only as a temporary/diagnostic measure. If the lean spot is improved, or goes away, you'll know where to start looking, i.e. getting more fuel earlier in the throttle opening/rpm curve. FWIW, my first foray into VM22 tuning began by testing the as-delivered 30/100 jetting. Of course, we know how bizarrely off-the-charts that combo is...now. But, for the initial firing & around-the-block test ride, it was instant cold-start and EFI-like off-idle throttle response. I presume you recall, clearly, how the taming-of-the-VM22 (with apologies to Shakespeare) saga played out from there. My point is to make use of the lesson learned from starting off with a pig-rich idle-1/8 throttle A:F ratio.</p></blockquote><p></p>
[QUOTE="69ST, post: 171699, member: 5"] Just to be clear here...I'm talking about taking the idle A:F mixture into pig-rich territory, only as a temporary/diagnostic measure. If the lean spot is improved, or goes away, you'll know where to start looking, i.e. getting more fuel earlier in the throttle opening/rpm curve. FWIW, my first foray into VM22 tuning began by testing the as-delivered 30/100 jetting. Of course, we know how bizarrely off-the-charts that combo is...now. But, for the initial firing & around-the-block test ride, it was instant cold-start and EFI-like off-idle throttle response. I presume you recall, clearly, how the taming-of-the-VM22 (with apologies to Shakespeare) saga played out from there. My point is to make use of the lesson learned from starting off with a pig-rich idle-1/8 throttle A:F ratio. [/QUOTE]
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tuning challenge - off throttle issues
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