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10-02-2014, 08:52 PM | #1 |
Drives: 2007 Toyota Yaris Sedan Join Date: Mar 2013
Location: MA
Posts: 105
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When exactly does VVTi kick in?
2007 Yaris sedan here. I was just wondering at what rpm this feature kicked in. Also, does it give more power or simply save us fuel?
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10-02-2014, 10:35 PM | #2 |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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When exactly does VVTi kick in?
VVT is always active for best fuel efficiency.
It's not like Honda VTAAAKK. |
10-03-2014, 08:10 AM | #3 |
Drives: 2007 Toyota Yaris Sedan Join Date: Mar 2013
Location: MA
Posts: 105
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10-03-2014, 11:28 AM | #4 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
Posts: 4,790
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And certainly not like the Ford YAPYAPAAAP!
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10-03-2014, 12:59 PM | #5 |
Drives: Sedan 07 Join Date: Oct 2012
Location: Asia
Posts: 478
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10-03-2014, 01:07 PM | #6 |
Drives: 2011 Yaris RS 5 door 5 spd Join Date: Aug 2012
Location: Toronto, Canada
Posts: 449
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I think all valves open up at around 33-3500 rpm.
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10-03-2014, 03:34 PM | #7 | |
Drives: 2007 Toyota Yaris Sedan Join Date: Mar 2013
Location: MA
Posts: 105
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Quote:
That is awesome. I don't really understand the images though.. Like the white and black semi circles and what they represent. I'll have to do some additional research and self-learn a thing or two about valve timing. Thanks for the post! Sent from my iPhone using Tapatalk |
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10-03-2014, 04:57 PM | #8 |
Drives: Sedan 07 Join Date: Oct 2012
Location: Asia
Posts: 478
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those are the cam shafts of the intake (IN) with respect to the exhaust (EX). Imagine you are viewing the engine from the side (the 3 pistons blocked from your view by the piston closest to you)
Both of them in reference to 0degrees of timing or TDC (top dead center). |
10-03-2014, 08:12 PM | #9 |
2ZR swap. DO IT! Ask how!
Drives: 09 Meteoric Metallic HB Join Date: Feb 2011
Location: West Michigan
Posts: 2,333
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Funny, I thought it kicked in at 4k rpm, since that's where the power band starts. Something new every day, eh?
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10-04-2014, 10:54 PM | #10 |
Drives: 2011 Yaris 5 dr LB Join Date: Apr 2011
Location: OR Coast
Posts: 22
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And I thought VVTI meant " Very Very Tiny Injun"...
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