Previous Thread
Next Thread
New Reply
Print Thread
Joined: Oct 2003
Posts: 18
Kody
Member
Kody Nov 20, 12:24pm - #61944 
Member
2000 Toyota Celica SS2 VVTLi

Joined: Oct 2003
Posts: 18
New Zeland, Wellington
VTEC vs VVTLi vs VVTi vs MIVEC

Which one will win?? arnt they all the same?
Joined: Nov 2002
Posts: 344
tWiSteD
Member
tWiSteD Nov 20, 1:33pm - #61945 

Member
2000 Toyota Celica

Joined: Nov 2002
Posts: 344
Marietta, GA
from my understanding, vtec (variable/valve timing and electronic lift control) uses the alternation of the cam profiles to produce the band they get (however i think it can be changed to kick in at lower rather than higher RPM, but is no where near as drastic a "boost" as vvtli), vvtl-i (variable valve timing and lift intelligence) uses alternating camshafts to produce the power band we get at 6k rpm, vvt-i(variable valve timing with intelligence) i don't think uses alternating cams, but i know it makes the engine run at optimum performance, timing wise, throughout the whole rev range, mivec(mitsubishi innovative valve timing and lift electronic control system) uses a very similiar alternating of the cam profiles, i've never riden in one, but i hear they engage at about 3,500 RPM...of course they don't have the 7800 redline...

in all, i think vvtl-i is 'better' only because of the very noticable power it creates when hit, and it is a lot newer than vtec and all that...takin after variocam, from porche.

EDIT: i just touched base with all these, this isn't an entire explanation...there are articles on ecelica that would help you better understand vvtli and vvti. Anyone feel free to make corrections or add shit on thumbsup

Not just another girl's car...
Joined: Apr 2003
Posts: 71
Michael Aristide
Member
Michael Aristide Nov 21, 6:37pm - #61946 
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
VTEC utilizes cam-changing only. The only other companies that use this only are Nissan's NEO VVL and Mitsubishi's MIVEC. Toyota uses cam phasing (VVT-i) in the GT (I.E. i-VTEC in base RSX, Nissan NCVS, BMW Double VANOS), and cam-phasing plus cam-changing (VVTL-i) in the GTS (I.E. Honda i-VTEC in RSX Type S, Porsche VarioCam).

Cam-changing = Variable valve lift
Cam-phasing = Variable valve timing

IMO, the best technology is variable valve timing and lift which is incorporated in the Celica GTS, Acura RSX Type S, Porsche 911 Carrera, etc...

**DONOTDELETE**
Unregistered
Anonymous Nov 22, 5:00am - #61947 
Unregistered



not too sure but I say VVTL-I. I was riding in my friend's civic and asked if he could take the car up to VTEC, didnt kick in really hard as I thought. Then I had him get in my GTS and took it to lift...He said lifts kick in way harder than vtec...dont know anything about MIVEC tho

**DONOTDELETE**
Unregistered
Anonymous Nov 22, 7:51am - #61948 
Unregistered



VVTLi is best but still doesent have that much support in aftermarket like Vtec. Lift is best.
Joined: Jul 2003
Posts: 22
TeaQBD
Member
TeaQBD Nov 22, 10:22am - #61949 
2000 Black Toyota Celica
Member
2000 Toyota Celica

Joined: Jul 2003
Posts: 22
Pittsburgh, PA
I think they all use the same NA technology of valve timing and valve phasing. It's just 2ZZGE's VVTL-I kicks in harder because the cams were designed to do so. I'm sure Honda with their VTEC or Porsche with their Variocam could do the same if they designed aggressive high speed cams like the GTS. By the way, the kick when lift engages isn't too good of a thing in racing as it destabilizes a car during cornering.
Joined: May 2003
Posts: 2,454
Elec-FuYu
Specialist
Elec-FuYu Nov 22, 4:49pm - #61950 
2003 Silver Toyota Celica
Specialist
2003 Toyota Celica

Joined: May 2003
Posts: 2,454
B.C. Coquitlam
Originally Posted by TeaQBD
I think they all use the same NA technology of valve timing and valve phasing. It's just 2ZZGE's VVTL-I kicks in harder because the cams were designed to do so. I'm sure Honda with their VTEC or Porsche with their Variocam could do the same if they designed aggressive high speed cams like the GTS. By the way, the kick when lift engages isn't too good of a thing in racing as it destabilizes a car during cornering.

not if you stay in lift when you cornering...which prevents loss of power when exiting the corner too... idunno

I am a HID Maniac!!
Joined: Apr 2003
Posts: 71
Michael Aristide
Member
Michael Aristide Nov 22, 9:47pm - #61951 
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
How hard it kicks in has NOTHING to do with how effective a technology is. All that means is that maybe the low speed cam might be less agressive than say in a VTEC car so the changeover is more apparent. That type of logic spells R-I-C-E-R all the way. Research your shit first. My previous post says what different types of systems companies use. Read up on technical reports to decide which is best, not a butt dyno. rolleyes
Joined: Apr 2003
Posts: 71
Michael Aristide
Member
Michael Aristide Nov 22, 9:50pm - #61952 
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
Originally Posted by TeaQBD
I think they all use the same NA technology of valve timing and valve phasing. By the way, the kick when lift engages isn't too good of a thing in racing as it destabilizes a car during cornering.


You're so off on so many levels it's not even funny... Linked Image
Join the conversation - Register now or Sign in to add your comment


Moderated by  isaac 

Customize Your Toyota CelicaPrivacy Policy · About · Contact
CelicaHobby.com is an independent Toyota Celica enthusiast website. CelicaHobby.com is not sponsored by or affiliated with Toyota Motor Sales, USA, Inc. in any way. The Toyota and Celica names and logos are trademarks owned by Toyota Motor Sales, USA, Inc.
© CelicaHobby.com, 2001-2016