08-04-2012, 07:59 AM
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#10 (permalink)
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Enthusiast Member
Join Date: Dec 2011
Location: Cypress
Posts: 277
Drives: 2011 Nismo #4 MB
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Quote:
Originally Posted by wstar
^ VVEL is always active, it's pretty integral to how the ECU operates this engine (VVEL != VTEC). I'm pretty sure the normal throttle butterflies *do* vary in some situations though, they're not completely static.
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VVEL is not like Vtec. VVEL controls valve timing on intake and exhaust. VTec controls the valves in Honda you have a extra lobe on the cam when activated these open all the valves will open using this hotter lobe on the cam. Now i-Vtec adds the VVEL to the mix with variable valve timing to the intake and exhuast for better performance through the RPM band.
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