After years of working with 4ag motors "especially the rare blacktop 20v engine" I have noticed that the vvti is very similar to the 20v "just on a mega reduced rpm scale" From all the dyno information it looks like it activates at 3500rpm and shuts down at 5500rpm under full throttle. Can anyone confirm this..?

If this is the case, look at the torque curve without vvti in the lower rpm. I know they do not want it activated at lower rpm for the engine will be more prone to detonation. but it does look like there is allot of tuning room down low with better gas.

Man after looking at everything, this engine is screaming for standalone!

Another question. Is the 2az useing the normal toyota style oil control valve to operate vvti..? Anyone know how the logic is setup on the vvti as in how it activates and when during anything under wot?

Another question, what is the total advance on the intake cam under vvti? and since it is vvti is it changing lift on the cam as well..? Does she start out at 0 and advance to 15 or start out at 15 and advance to 30 like a blacktop? Or totally different!

Also is there anyone making an adjustable ex cam for the tc or a vvt eliminator cam?

Sorry for all the questions, but the time has come for me to start doing some serious mods to the car when it arrives today or tommorow and start developing the engine into what I want it to be.

 

The intake timing varies by 43degs, with a range of 3deg - 46deg.

Getting more info....

 

Sweet. Now can she vary it at will meaning from 3-20 or 3-35 or whatever she feels like, which may be why they are calling it vvt"i"

The 20v stuff I am used to working on is kinda like an on off switch. starts at 15 and goes to 30. or on a silvertop she starts at 0 and goes to 15.

I am very curious about that because the car is super lumpy before 3500rpm when it comes to torque. Looks like the ecm is trying to figure out what to do with the cam and it give is a little advance, yanks it and advances it again then yanks it and then comes on full advance at 3500rpm.. all happening in a mili second...

 

Here's a chart illustrating what the VVT-i is doing.



At idle and low engine speed, it retards the timing.

 

Now here is another question that might explane the mega lumps in torque down low... does anyone have a good dyno run with a/f ratio..? Every one I have seen does not have a/f attached during the run...

 

Ah good to know, she can advance / retard to whatever she feels like in the 3-46 degree range. Thoguht that was why they were calling it vvt"i" now instead of just vvt.

 

^^^ yepp....the "i" is intelligence

 

No one else has info on this kind of matter..? Wow no wonder tuning is so limited on this engine so far!

 

hence why people are blowing their engines when they put turbos on their cars!

companies don't know how to properly "tune" our motor!

btw, we have the camry motor....i haven't seen a camry all tricked out!

 

I'm getting real tired of this "Camry motor" B.S. The motor is used in 3 other models. The tC is tuned differently than the Camry. And only 1 person has blown a motor. Stop being so damn negative, you've done this to like 2 or 3 threads now.

 

I hear ya, that and this engine while strong is no performance motor. Crap it is an f-series engine! That means it is the economy based heads! I mean it is a good engine and all and decent internals but tuning toyota f-series engines to really perform like a g series head is like like putting a gold chain on a dog turd. Sure looks good on the surface but overall it stinks!

They need to come out with a 2az-ge and I will be all over it haha

 

I think people talk about it as a camry engine and not say a rav 4 engine because it the camry is what it is sold out of the most. Now do not get me wrong fella's I love my tc and the engine is a nice build for an economy based aluminum block but I do wish toyota gave us somthing better to work with than an f series head.

 

not being negative, everyones got opinions and comments. dont get all huffy man jesus.....

people just love to jump all over people on here

 

x2 well put

 

Sorry to come off as all jumpy and stuff, but you're beating a dead horse with the blown motor, no name turbo thing. IDK, maybe it's the crappy weather out here, it's making everyone crabby.

Yeah, it would have been nice to get a G-series head but I doubt we're going to be seeing many of them anymore. That's the challenge and part of the fun and the result is that much more rewarding. The engine has proven it's stout nature so far and it's still an infant. Give the aftermarket time to seriously unleash the beast that lies under our hood.

 

nah, dont worry about it man, its alright. i just rant sometimes i guess, i probably should stop doing that. weather? hmm its like mid 80's out here in AZ

I always say, if you have the money, you can always do motor work and really unleash the beast until then, i'm taking things slow and watching my money, probably getting tyc tails and tint done soon.

 

You got it, the sad part is since toyota went away from the cast iron alloy blocks we will basically have to treat these bottom ends as honda bottom ends. Not sure how tough they are since I have not had the chance to really wail on one but it does still look to be a good design. I can say that even though it is an F version head, technology has gotten to the point were the new F series heads are outperforming early 90's g series heads flow wise. That is a nice thing

 

is there any possibilty that we can do a head swap.

FE for a GE head and use our stock cams?

or maybe jus take the GE head off a 3sg or 2zz and swap?

i've been tinkin about that (with my honda head). they did that with a k24 bottom and k20 head swap. added 20whp. instantly

2zz-ge head with 2az-fe bottom = 2az-ge?

unless we shoud wait for the JDM tc and jus buy the GE head from japan :D

 

hm... it may work with the 2z head... possible but the tc being a 2.4" and the 2zz being a 1.8L the combustion chamber would be really funky small on the headside. Would be interesting to compare the two, valve size, port size and all. Mabey see them side by side on a flow bench.

 

If you're so concerned with the head, then why not just buy an aftermarket tuned head, as in the "stage whatever."

Its a camry engine. So? While some get tired of calling it a camry engine, I get tired of others thinking its the best thing since sliced bread. Its a great motor, but certainly not a "beast" by any means.

As far as putting the 2z head on... if the motor has matching bores and matching head studs, it could be possible, but I would bet tuning for it would require a standalone.


Hell, the real advantage to a 2z head is the "lift" portion of the VVTiL, and that doesn't occur until well after our redline. Granted, you might be able to run a higher redline, but I dont know if our bottom end was built for that. Long stroke = low redline.