Mazda3Club.com  

Go Back   Mazda3Club.com > General Discussion > Mazda3/Mazdaspeed3
Sign in using an external account
Register Forgot Password?

Mazda3/Mazdaspeed3 General/Maintenance Discussion of the Mazda3 and MazdaSpeed3

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old August-12th-2004, 10:19 PM   #1
Registered User
 
[-GibZ-]'s Avatar
 
Join Date: Aug 2004
Location: montreal, lasalle
Posts: 6
[-GibZ-] is on a distinguished road
Variable Valve Timing (VVT) VS VTECH

i am wondering if the mazda variable valve timing is the same thing then Vtech i know how vtech works (switch of cam a 4500 rpm) but couldnt find good information about VVT as i can see in my 3 sport the engine seem to get excited at high RPM too.. (110 km/h in second gear ) can someone explain it to me or give a link please?
[-GibZ-] is offline   Reply With Quote
Old August-13th-2004, 01:20 AM   #2
The man behind the mask
 
Roddimus Prime's Avatar
 
Join Date: Oct 2003
Location: Birmingham, AL
Posts: 11,572
Roddimus Prime has disabled reputation
Send a message via AIM to Roddimus Prime Send a message via Yahoo to Roddimus Prime
Vtech is honda's name for valve timing....VVT is mazda's name for variable valve timing. VVT-i is toyota's name for variable valve timing WITH intelligence.

It's all 100% the exact same thing. It just changes the cam profile at a pre-determined point to allow the engine to breathe better based on its current rpms.
__________________
Get Paid to answer Questions...seriously. https://www.surveysavvy.com?id=3217386&action=join
Roddimus Prime is offline   Reply With Quote
Old August-13th-2004, 02:24 AM   #3
Moderator/ Pocket Tuner
 
macdaddyslomo's Avatar
 
Join Date: Apr 2002
Location: Tampa,Fl
Posts: 4,150
macdaddyslomo is on a distinguished road
no its not Matty....Mazda's S-VT is a continuously variable cam timing system....V-TEC is LOW-TECH(it's basically on or off) compared to S-VT..It is however similar to the VVT-I...however note torque numbers on the Mazda S-VT engines compared to Toyota and Honda's Variable Valve timing systems...Mazda's have MUCH more torque
__________________
Different CAR NOW !

2007 Ford Focus ST SAP
macdaddyslomo is offline   Reply With Quote
Old August-13th-2004, 02:52 AM   #4
Registered User
 
ZOOM_X_TWO's Avatar
 
Join Date: Jul 2002
Location: Chicago
Posts: 146
ZOOM_X_TWO is on a distinguished road
Send a message via AIM to ZOOM_X_TWO
but vtec is way cooler! Mmm i can still smell the vtec from my GSR...ahh the good old days.
__________________
<02 badgeless black mica Pro5 5 speed>

*Monsterflow polished SRI.

...still lovin' the daily clutch chatter...

Take me to the twisties!
ZOOM_X_TWO is offline   Reply With Quote
Old August-13th-2004, 07:38 AM   #5
Registered User
 
[-GibZ-]'s Avatar
 
Join Date: Aug 2004
Location: montreal, lasalle
Posts: 6
[-GibZ-] is on a distinguished road
ok thx macdaddy,i knew that it wasnt the same they can't copy the honda technology...
VVT is relly defficient because compare to a P5 the performance is much better
[-GibZ-] is offline   Reply With Quote
Old August-13th-2004, 10:24 AM   #6
The man behind the mask
 
Roddimus Prime's Avatar
 
Join Date: Oct 2003
Location: Birmingham, AL
Posts: 11,572
Roddimus Prime has disabled reputation
Send a message via AIM to Roddimus Prime Send a message via Yahoo to Roddimus Prime
Quote:
Originally Posted by macdaddyslomo
no its not Matty....Mazda's S-VT is a continuously variable cam timing system....V-TEC is LOW-TECH(it's basically on or off) compared to S-VT..
I knew that but I was trying to keep it simple so no'one gets confused. Also, I'm a lazy poster and didn't feel like going into specifics but the toyota vvt-i is also continuously variable like the mazda and even the new hondas now have it.
__________________
Get Paid to answer Questions...seriously. https://www.surveysavvy.com?id=3217386&action=join
Roddimus Prime is offline   Reply With Quote
Old August-16th-2004, 01:08 PM   #7
fdb
Registered User
 
Join Date: Aug 2003
Location: Ontario, Canada
Posts: 77
fdb is on a distinguished road
Mazda's system continuosly varies valve timing, but does NOTHING to lift and duration of the cam. Those are constant.

The latest version of VTEC, found in the RSX, varies timing continuosly like Mazda's system and still switches cam lobes at 6000rpm or whatever it is.....

Advantage Honda.
fdb is offline   Reply With Quote
Old August-25th-2004, 11:42 AM   #8
Registered User
 
Join Date: Aug 2004
Posts: 2
mazda3team is on a distinguished road
Cool

Quote:
Originally Posted by fdb
Mazda's system continuosly varies valve timing, but does NOTHING to lift and duration of the cam. Those are constant.

The latest version of VTEC, found in the RSX, varies timing continuosly like Mazda's system and still switches cam lobes at 6000rpm or whatever it is.....

Advantage Honda.

Correct Honda's is still more advanced interms of internal engine timming controling with its cam profiles. However Mazda has along with their static cam shaft that does kick its timming at 4500rpm, is VAD (Varible Air Duct) VLIM (Varible Length Intake Manifold) VTCS (Varible Tumble Control System) VVT (Varible Intake Valve Timming ( Cam-phasing intake cam only). These are all addition ways to give control to the static VVT. Our VVT is more benificial then Hondas in the sence that it give us more torque at a more brodem RPM range, but not controlled. The control comes in to play wth the others mentioned above.

So in essence instead what Mazda has done was realize that the controling cam while timmimg is not going to acheive the best power gains in terms of torque. They decided to let put controled valves in the intake runners and Air ducts of the air intake system. This give the flexiblity lost with none controled cams but the added full torque with the static VVT.

his is another form of valve tuning, and it works on the principles of Helmholtz Resonance. This was created in the 1991 Mazda 787B Rotory car that was banned. It was the first rotory & Japanese car to win the Lemans 24hr race.
__________________

Last edited by mazda3team; August-25th-2004 at 12:03 PM.
mazda3team is offline   Reply With Quote
 
 
 
Reply

Tags
active, cam, continuosuly, continuously, control, mazda, mazda3, sale, sky, timing, valve, variable, vtech, vvt, works


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
J&S Safeguard For Sale (timing controller) big_ben Parts For Sale or Wanted 0 January-22nd-2003 12:54 PM
Mysterious Valve Cover AcoupDetat Photo and Video Gallery 9 January-21st-2003 01:42 PM
Putting in new valve seals... SLPRprotege 1st gen/323/GLC Engine and Drivetrain 5 January-15th-2003 08:05 AM
Need help with timing belt Craig 1st Gen Protege/323/GLC 12 October-29th-2002 05:18 PM




All times are GMT -5. The time now is 10:02 AM.


All content Copyright © 2012 by Internet Brands, Inc.