Reply to thread

See what others are reading now! Try Forums > Current Activity

Message: <blockquote data-quote="Motronic" data-source="post: 4464829" data-attributes="member: 61151">LOL ... Same discussion which we had few years back. Actually toyota VVT-i and daihatsu DVVT is not develop by their own. The vvt founder was YAMAHA. Toyota buys the technology from YAHAMA and comply in their latest. Earlier daihatsu engine wasn't feature with VVT system. The VVT is part of the feature after toyota acquire daihatsu many yrs back. Both system is similar in mechanism and functionality. Why vvt happen to have one side at intake ? For fuel efficient purpose , continuosly cam phase shifting need to happen at intake alone. The cam phase shifting will be advance at low revving and low load. The cam phase shifting is continuosly retard with every increment of RPM. As we know , by advance the cam angle of intake cam will help to improve pick up at low end. But vvt system is designed to advance 50 degree max at initial. The design was aimed to draw back the burnt gas into intake port and purge back to cylinder when intake open later. The burnt gas will mixed fresh mixture and burn again. As claimed , burnt gas still consist with some unburn fuel element and draw back to burn once again. With this concept , the less fresh mixture needed for every suction stroke. Dual vvt-i is happened to see in 3sgte or Altezza engine. That is performance setup and not really fuel save setup . In the world emission controlled is being urge to take serious act in japan and euro . V-tec system at intake exhaust is not longer apply unless vvt system use along with this system. Same goes to other variable valve timing system develop by lotus which used in Porsche and current CPS. Due to emission controlled , proton only allow to have intake VTC . They had the VTC system for both intake and exhaust during development . They can't comply them if they need to pass the emission test.</blockquote>

Verification

The Marketplace Latest

original rare 5zigen 5ZR 18x7.5jj offset +48 5H pcd...
- Started by david tao
- Chassis and Wheels
BMW F10 Mperformance front skirt lip
- Started by jeff6126
- Exterior and Body
Perodua Alza convert new facelift body parts
- Started by jeff6126
- Exterior and Body
BMW E60 Msport Body Kit
- Started by jeff6126
- Exterior and Body
BMW F30 M3 mperformance front skirt lip
- Started by jeff6126
- Exterior and Body
Honda City 2014~19year Drive68 body kit
- Started by jeff6126
- Exterior and Body
Perodua Alza gear up body kit / spoiler
- Started by jeff6126
- Exterior and Body
Proton Saga Mix body kit
- Started by jeff6126
- Exterior and Body
Mitsubishi Lancer JS GTwing spoiler
- Started by jeff6126
- Exterior and Body
Honda Civic FD TypeR body kit
- Started by jeff6126
- Exterior and Body

Posts refresh every 5 minutes

Best EMS for Evo 9

Dear all sifu,

Wanted to install a EMS to my E9 but duuno which brand should I go for! For light mod only !
Purpose to install cos need stable fuel supply to handle high boost! Correct me if I am wrong! I am newbie...

consider to buy 350z unreg 2005.. plz helps sifus

fairlady 350z manual is 6 speed.. so, the automatic is how many speed??

is it the fairlady center console there will got heat same like my current mazda rx8??

maybe i will change my rx8 auto 4 speed to fairlady...

The Final Calling for Time To Attack This Sunday!

https://www.zerotohundred.com/wp-content/uploads/2010/07/Zerotohundred.com-Time-To-Attack-Rd.2-7-copy-copy-600x401.jpg

If you’re gunning for a spot in the final round of the Time To Attack event come December, the...

Search

Enjoying Zerotohundred?

Log-in for an ad-less experience

Reply to thread

The Marketplace Latest

original rare 5zigen 5ZR 18x7.5jj offset +48 5H pcd...

BMW F10 Mperformance front skirt lip

Perodua Alza convert new facelift body parts

BMW E60 Msport Body Kit

BMW F30 M3 mperformance front skirt lip

Honda City 2014~19year Drive68 body kit

Perodua Alza gear up body kit / spoiler

Proton Saga Mix body kit

Mitsubishi Lancer JS GTwing spoiler

Honda Civic FD TypeR body kit

Posts refresh every 5 minutes

Recent Posts

Performance Tire Prices(Pls Contribute The Price & Location to buy)

Tire Price list Zth

Paging for Hyundai Coupe owner, CCGT @ 28th May 2005

New GR Yaris Automatic & GR Supra Track Edition Now in Malaysia

2025 Volvo EX90 Wins World Luxury Car Award

Search

Online now

Enjoying Zerotohundred?