Previous Thread
Next Thread
New Reply
Print Thread
Joined: Oct 2003
Posts: 18
Kody
Member
Kody
Member
2000 Toyota Celica SS2 VVTLi

Joined: Oct 2003
Posts: 18
New Zeland, Wellington
Nov 20, 5:24am - #61944 
VTEC vs VVTLi vs VVTi vs MIVEC

Which one will win?? arnt they all the same?

Joined: Nov 2002
Posts: 344
tWiSteD
Member
tWiSteD

Member
2000 Toyota Celica

Joined: Nov 2002
Posts: 344
Marietta, GA
Nov 20, 6:33am - #61945 
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
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
Nov 21, 11:37am - #61946 
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
Unregistered



Nov 21, 10:00pm - #61947 
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
Unregistered



Nov 22, 12:51am - #61948 
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
2000 Black Toyota Celica
Member
2000 Toyota Celica

Joined: Jul 2003
Posts: 22
Pittsburgh, PA
Nov 22, 3:22am - #61949 
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
2003 Silver Toyota Celica
Specialist
2003 Toyota Celica

Joined: May 2003
Posts: 2,454
B.C. Coquitlam
Nov 22, 9:49am - #61950 
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
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
Nov 22, 2:47pm - #61951 
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
Member

Joined: Apr 2003
Posts: 71
Miami/Daytona Beach
Nov 22, 2:50pm - #61952 
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 Log In to add your comment


Moderated by  isaac 

Member Spotlight
BlkCelicaGT07
BlkCelicaGT07
2000 Toyota Celica GT
(818) Porter Ranch, CA

Posts: 688
Joined: August 2004
Thanks: props to Isaac and all the moderaters for this great site!!!
Random: Dont insult the ociffer, he has a stick!!!
Show All Member Profiles 
Shout Box
Recent Topics
WTB: 00-02 amp bypass harness
by MJ00GTS. 04/18/2017 7:36 PM
Does not seem to be much activity for the 5th gens???
by Coop301. 04/18/2017 7:51 AM
Cold wet weather hesitation
by GTS25430. 04/17/2017 6:15 AM
00-02 premium 8spkr 2din gps solutions?
by MJ00GTS. 04/17/2017 2:24 AM
WTB: valve assy, vacuum switch
by hydraea. 04/15/2017 5:32 PM
500awhp project
by Salman. 04/14/2017 8:20 AM
Please help!!
by Toastbuster. 04/13/2017 11:49 PM
K&N air filter on Celica
by Toastbuster. 04/13/2017 5:16 PM
Customize Your Toyota Celica Privacy Policy · About · Contact
Privacy 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, 2001-2017
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Snapshot build 20170416)