Vtec controller
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From: Dallas, PA
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my civic has no boost
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i've heard alot about vtec engagment and air fuel ratio.....but the downside would be running to lean or to rich...i really want to educate myself on this a lot more i dont like being in the dark.
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From: Milwaukee, Wisconsin, US
Rep Power: 399 a vtec controller doesn't do much good unless you dyno tune it.
one thing you should NOT do is change the factory settings without dyno tuning. the good ol "butt dyno" does jack in this case, and without proper dyno tuning you could run too rich or too lean and really mess up your engine.
other than lowering your vtec engagement point just a slight bit, you can't do much with a vafc without dyno tuning.
one thing you should NOT do is change the factory settings without dyno tuning. the good ol "butt dyno" does jack in this case, and without proper dyno tuning you could run too rich or too lean and really mess up your engine.
other than lowering your vtec engagement point just a slight bit, you can't do much with a vafc without dyno tuning.
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From: so cal djmota=oscar
Rep Power: 323 With a stock cam the best vtec setting is stock. You can raise it to feel a nice kick but you are losing the lower end and not gaining anything up top. Changing your vtec setting is a waste. I've done it on the dyno. 
<-sounds a bit dirty huh? vafc2 is good as a fuel tuning tool and who knows, with the introduction of a few cams for the d17 by crower a vtec adjustment might actually help....we'll see.
<-sounds a bit dirty huh? vafc2 is good as a fuel tuning tool and who knows, with the introduction of a few cams for the d17 by crower a vtec adjustment might actually help....we'll see. 
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From: Dallas, PA
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Originally Posted by djmota
With a stock cam the best vtec setting is stock. You can raise it to feel a nice kick but you are losing the lower end and not gaining anything up top. Changing your vtec setting is a waste. I've done it on the dyno. <-sounds a bit dirty huh? vafc2 is good as a fuel tuning tool and who knows, with the introduction of a few cams for the d17 by crower a vtec adjustment might actually help....we'll see.
<-sounds a bit dirty huh? vafc2 is good as a fuel tuning tool and who knows, with the introduction of a few cams for the d17 by crower a vtec adjustment might actually help....we'll see.yeah, i wouldn't mess with vtec.........i'd just get the safc.
but if it's not recommended changing the vtec setting then safc II is suffucient. i read on a different thread that someone changed their vtec setting to kick in at 3900RPM ant they gained like 8whp. any conformation it that's possible?
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Originally Posted by kornsined
but if it's not recommended changing the vtec setting then safc II is suffucient. i read on a different thread that someone changed their vtec setting to kick in at 3900RPM ant they gained like 8whp. any conformation it that's possible?
well may be a worthy investment down the road. how much dyno time is needed? i remember gearbox stated he got a whole 2whp after tuning.
Last edited by kornsined; Jan 31, 2005 at 03:57 PM.
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Originally Posted by kornsined
well may be a worthy investment down the road. how much dyno time is needed? i remember gearbox stated he got a whole 2whp after tuning.
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Originally Posted by kornsined
how hard is it to figure out how to tweak?
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