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V-AFC tuning lag?

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Old Sep 12, 2003 | 09:17 PM
  #1  
satan_srv's Avatar
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From: East Village, NYC
Default V-AFC tuning lag?

Has anyone noticed a tuning lag for the V-AFC? Like if I say +5 at 5500rpms on the high cam, does the desired effect on a/f show up right at 5500rpms? Or shortly after?

I'm just looking at my a/f graph and my dyno, going to add my +/- to the graph and fine tune it, so I just want to know if I should be compensating for a 1-30rpm lag if there is one. Thanks.
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Old Sep 13, 2003 | 10:42 AM
  #2  
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Default Re: V-AFC tuning lag? (satan_srv)

I notice a little bit of lag in the a/f ratio for a few hundred rpms one vtec hits... Not sure if it's the VAFC though, I always figured it's because of my non-vtec OBD-0 PM6 ECU.
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Old Sep 13, 2003 | 11:32 AM
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Default Re: V-AFC tuning lag? (MrTodd)

I mean like all the time...say you did a generic 4500,5000,5500,6000,6500 for increments. Obviouly the fuel needs aren't easily applicable in only 500 rpm increments. Just looking at my a/f it's not immediately noticeable that the different fuel change is affecting the a/f ratio...I'll build in a slight anticipation factor I guess.

Just if you look at the A/F curve I've made adjustments every 500rpms so you don't see immediate changes know what I mean?
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