ClubLexus - Lexus Forum Discussion

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-   GS - 2nd Gen (1998-2005) (https://www.clublexus.com/forums/gs-2nd-gen-1998-2005-184/)
-   -   what's the difference between VTEC and VVTI? (https://www.clublexus.com/forums/gs-2nd-gen-1998-2005/324267-whats-the-difference-between-vtec-and-vvti.html)

swat1727 Dec 15, 2007 05:38 PM
what's the difference between VTEC and VVTI?
 
Does anyone know?!

GSteg Dec 15, 2007 05:41 PM
a quick summary

https://www.clublexus.com/forums/sho...9&postcount=20

LiCelsior Dec 15, 2007 05:42 PM
honda and lexus. close thread.

swat1727 Dec 15, 2007 07:43 PM
wow nice summary gsteg. thax

Lettuce Dec 17, 2007 12:02 AM
whats vtec......oh...nevermind..I remember it only turns on after 7000 rpm.

CK6Speed Dec 17, 2007 03:58 AM
Originally Posted by Lettuce (Post 3129556)
whats vtec......oh...nevermind..I remember it only turns on after 7000 rpm.
It doesn't have to. It is different depending on the car. The Civic VTEC engaugement is different from the NSX VTEC engaugement and different from the ITR and such. It is tuned for the car.

VTEC and VVT-i are similar but are not the same.

VTEC varies cam lift, but not cam phase. VVT-i varies came phase, but not cam lift.

i-VTEC and VVTL-i are much more similar as the both control valve lift and cam phase/timing.

Lettuce Dec 17, 2007 10:59 AM
Originally Posted by CK6Speed (Post 3129665)
It doesn't have to. It is different depending on the car. The Civic VTEC engaugement is different from the NSX VTEC engaugement and different from the ITR and such. It is tuned for the car.

VTEC and VVT-i are similar but are not the same.

VTEC varies cam lift, but not cam phase. VVT-i varies came phase, but not cam lift.

i-VTEC and VVTL-i are much more similar as the both control valve lift and cam phase/timing.

I use to have various vtec motors, and was just making a point.;)


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