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Uploaded by Toyota Vios Club Indonesia. Courtesy of PT. Toyota Astra Motor, Indonesia.
Variable Valve Timing Mechanism on Toyota
February 15th, 2009 | Toyota Vios
25 comments ↓
VTEC is good at performance and fuel economy as long as u don’t floor it all the time but i-VTEC is even better. VVT-i is just a little improvement on performance not as much as VTEC because it does not change the valves’ lift but it’s designed mainly for fuel economy. VVTL-i is the one that is similar to i-VTEC (RSX Type S). But, I cannot give a definate answer because there are many types of VTEC and i-VTEC out there that are designed for different goals. You should take a look at wikipedia.
soo which ones better? or I should say, which has the most impact, power wise, and fuel economy wise…?
greedy crossover (lol) that VVT-i … is
well explained
VVT-i is just overlapping valve timing. It has nothing to valve lift like VTEC. The valve-lift stays the same. Dual VVT-i means that both the intake cam pulley and the exhaust pulley have the variable timing controller on them. VVTL-i is the one that is similar to VTEC wich involves valve-timing lift control. i-VTEC is the new breed from Honda which involves both the regular VTEC and the variable valve timing controller on the cam pulley which is similar to Toyota VVT-i.
most supra’s are fatass too hahahahaaha
most guys running 2JZ’s with VVTI would run standalones to control the VVTi but some would just disable VVTi because the turbo pushes all the air in during the intake phase. Forced induction that is.
i-Vtec and VVT-i, i dont give a **** they are still great things to play with, lets include Dual VVT-i. I love systems that adjust lift duration and timing, its great technology.
Honda makes great NA motors, Toyota makes motors good for turboing, and Nissan owns with VQ37 w/ VVEL redline 7500
yeah you’ll end up replacing stock internals and stock **** if you’re building a race car, that would be dumb if you didn’t. Try to get a supra to run 7’s.. It’ll NEVER HAPPEN.
FYI, VVT-I is the same as IVTEC. And what do you mean they got boost for intake?
Now if you are making a 7 sec drag car why would it be street drivin? that makes no sense at all. **** i can make a civic run 12’s all motor with only a motor swap STOCK internals. Don’t beleive me look up eg hatch with a k20a or k20a2 swap.
anyway, you’ll end up replacing driveshafts and trannies and everything you will need to handle you so-called high powered 1.6 to 2.2 liter 4cylinder motors. sure they got lots of VTEC motors that honda makes, i myself enjoy my odyssey’s SOHC VTEC V6. but would i ever waste my time to make it run 7’s? no way dude, you gota do alotta chassis work, suspension, AND engine/ transmission to get that power down…
btw, some 2JZ’s have VVT-i, depending that is. but they got boost for intake =]
but which one is more easier to drive on the streets daily?
i think a 7 second civic owner would spend more time fixing than driving….
for a 7 sec civic you gotta gut it out and do huge motor work and swaps and stuff. plus it’s FWD……
NO VTEC NO PARTY!!
thats what i noticed also. that means this engine would need a very high octane fuel or else….. after a few years with normal wear the intake would also become the exhaust.
I don’t know. I was helping my friend clean his engine bay, and I asked what it runs, boost wise, and he said 24lb, unbuilt. Now, I trust the kid, because he knows what he’s talking about. But, I could have misheard him
i take it you’re talking about the 4G63DET? they would boost 12-13lbs stock. thats it. i had one with a real boost gauge not just the factory one lol.
my friend has one with a 16G evo turbo and all the supporting mods. he can get 25lbs if the conditions are right. and the 1st and 2nd gen 4G63’s came with a 14G. much smaller.
WTF are you talking about? The EPIC Tuning Civic runs well over 20psi (394hp) – on a bone-stock D16Z6! Then there’s the dozens of 500hp STOCK K20’s, 500hp STOCK F20’s, etc.
Boost pressure isn’t the end-all: 20psi on a T25 will barely get you 200hp, while 20psi on GT42 will get you FAR beyond 600hp.
BTW you realize what the Hemi principal is, right? A combustion chaimber with intake valves on one side, exhaust on the other, and the plug in the middle. Sound like…a modern HONDA. You fail.
I have a 67 Firebird with a worked 455 (and my neighbor with a 68 Firebird with a 500whp 455), and I much prefer a lightweight turbocharged vehicle. I get 3x the gas milage, but get better times in the 1/4 mile.
You honestly have never boosted a Honda…. the B20 only pulls 5psi, the K20 should never touch a turbo, it lags…. and the F20 barely pulls 8psi after some serious motor work… The only motor decent enough to hold serious boost pressure is the B18C.
why are you comparing the Hemi in this video its says nothing about a Hemi and second the Hemi is (OHV) not OHC or DOHC I see nothing about the Hemi in this video tard.
Ah yes ah yes, F22C is 2.2. I’d go F20C for the higher redline though, if I had a choice to put in my Accord
I dunno, I find Hondas rather tunable, I’ve never dealt with Toyotas, and I don’t really want to. As of now, the only car they have that is close to “race-ready” is the Matrix XR, which still only dishes up 158 or so, at the crank. An old supra or a new celica, that’s all cool and great, but, Toys just don’t don’t do it for me. Probably brand loyalty again
My only problem with VTECs is they make better circuit motors than anything else really. Honda tried to hard to make the “perfect” engine. Toyota motors are more varied in tuning options. But as far as Honda’s F-series motors the F20 is a 2L, but Honda made the series even better with the 2.2 F22C in the AP2.
I don’t really like Mitsu or Toyotas or Nissans (although I love Infiniti’s)
I think it’s funny that on the earlier eclipses, Mitsu had to run 24lb of boost to make the DOHC engine even close to “fast”
I’m sure it doesn’t, but I grew up listening to VTEC over the other stuff, and I just like it more. It may just be brand loyalty, but I prefer it. And as far as Hemis for me, I also like the idea of American muscle. I’d prefer an old Hemi with a six pack, but I also do enjoy clean air and decent efficiency. I will always love the F20C for it’s raw power pulled out of only 2.2 (or is it 2.3?) liters to put it on par with Turbo’d or larger displacement roadsters.
I will never ever get MIVEC.
Epic fail…. I’ll give VTEC props, but it doesn’t overlap valves that cleanly, trust me. Rip apart the block and run it like that, you’ll see it for yourself. As far as the new Hemis… I’d rather get a new MIVEC. The Hemi isn’t worth **** anymore, it’s a 5.7L V8, and stock it still gets pwned by an F20C or even a 2JZ-GTE under the same conditions.
The F20C stock ***** the **** out of the 5.7 Hemi in the new Charger…. what’s sad is the Hemi pwns it in size by 3.7L and 2 cylinders lol secondly i saw a stock Si **** a mustang with spray i mean sure the stang would own in a 1/4 mile but in 1000m in final drive VTEC kicks in yo and most american cars have no final drive just close gear ratio and JDM cars have a better power:ratio sad how the new hemi lose to 2.0 riceboys if it were the original hemisphereical engine no rice would exsist
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