Toyota VVT-i vs. Honda VTEC

[4DoorsofFury]

oki know basically how the dohc and sohc vtec systems work, but hows does the toyota vvt-i work. does it also have the middle third lobe on the camshaft? on what toyota engines do the come with? and is the vvt-i "better" than the honda vtec?

[Razo-E]

i think VVTL-i is closer to i-VTEC...

[Camry2000]

VVTi = cam phasing where the ECU retards/advances the timing for maximum power

VTEC = VVTL = Lift, where a second more aggressive cam is lifted into play resulting in more power top end

iVTEC and VVTLi = uses both cam phasing and cam lifting

[4DoorsofFury]

thnx for the info bro

[jmschoep]

I asked the same thing and got this great link


http://www.onthenet.com.au/~billzila/vvtvtec.htm

There is one mistake- the 1ZZ-FE only makes about 72 hp per liter not 100!

[jwa276]

Originally Posted by jmschoep

I asked the same thing and got this great link


http://www.onthenet.com.au/~billzila/vvtvtec.htm

There is one mistake- the 1ZZ-FE only makes about 72 hp per liter not 100!

maybe the JDM engine makes 100+hp per liter? or maybe its included in the next generation.

jon

[jmschoep]

Well I talked to the guys on the Corolla forum- which is where I am most of the time- I have an 03 Corolla- and they said that the guy who wrote the page was wrong. The latest 1ZZ-FE, which is in my car make 130 hp, whick calculates out to around 72 hp per liter. Now the 2ZZ-GE, which I'm pretty sure is the Celica GTS motor- 100 hp per litler sounds about right- It make like 180 hp.

[F1 Chris]

Double VANOS and Dual VVTi have variable timing implemented on both the intake and exhaust. Honda has yet to make a car with dual VTEC. I think Toyota only has 2 cars with dual VVTi.

[jmschoep]

F1 Chris-
Both V-tech and VVTL-i change vavle timing and lift for intake and exhaust. I've never heard of a DUAL VVTL-i. Read the link-

http://www.onthenet.com.au/~billzila/vvtvtec.htm

[EKam]

Originally Posted by jmschoep

F1 Chris-
Both V-tech and VVTL-i change vavle timing and lift for intake and exhaust. I've never heard of a DUAL VVTL-i. Read the link-

http://www.onthenet.com.au/~billzila/vvtvtec.htm

From your own link:

The 3SGE has dual VVT controllers, one on the inlet and the other on the exhaust cams, and makes 210hp from 2 litres.

[jwa276]

only thing is that VVT is not VVTL-i. VVT is toyotas older version of cam timing, where the actual angle of the cam is changed and not the cam profile.

VVT was used in the mr2 4age (intake VVT only) and altezza 3sge, with dual controllers.

jon

[EKam]

Originally Posted by jwa276

VVT was used in the mr2 4age (intake VVT only) and altezza 3sge, with dual controllers.

jon

Sigh..................

1. The VVT version didn't exist in 1st gen MR2, VVT was available with the introduction of the 20v 4A-G engine in the Corolla.

2. Altezza 3S-GE has dual VVT-i, not the old VVT system in the 20v.

"BEAMS *1 3S-GE DUAL VVT-i"

http://www.toyota.co.jp/Showroom/All_toyota_lineup/Altezza/mechanism/index.html

[jmschoep]

My Bad F1 Chris-

I'm used to dealing with the newer versions, and too many times have heard people say VVT instead of VVTL-i (That is kinda a mouth full)

you're right about VVT

[jmschoep]

I musta skip thatlast paragraph when I read it and went straight to the VVTL-i description.

Sorry guys :cry:



What is BEAMS???

[Naito]

Originally Posted by F1 Chris

Double VANOS and Dual VVTi have variable timing implemented on both the intake and exhaust. Honda has yet to make a car with dual VTEC. I think Toyota only has 2 cars with dual VVTi.

i-VTEC in RSX-S engine is on both intake and exhaust valves, base RSX engine only has them on intake. I'm pretty sure the old 'teg Type-R's VTEC was on both too, as with NSX, tho I'm not sure of that. (I'd have posted engine codes but can't remember them right now)