Vvti?
- Thread starter SrT4_OwNeR
- Start date
Andre;1034723 said:
Translation?
That valve cover looks badass! along with the upper timing cover.
tturnpaw;1034804 said:
I would have gotten the vvti motor if I would have known the rods were the same size, its still a subject of debate, but apparently quite a few ppl have shown the vvti is just as good as the non vvti, but I've only seen tests on the 2j versions. the single on the 1j supposedly has a little more powerband to it though. still ceramic IIRC :3d_frown:
Dylan JZ;1034814 said:
if thats correct, then thats pretty amazing... i guess VVTi makes a difference. I was always told the VVTi puts a hamper on your power abilities....like 500hp. Never have seen one with more than 400. Could this possibly choke out with larger turbo more boost etc? The extra velocity could spin a larger turbo sooner....
Dylan JZ;1034847 said:
So the irony of this all is, noone bought them because of the weak rod belief, but they happen to be the same? What about forged internals? Nobody ever thought of that?
Anywho, there must not be enough duration in the VVTi cams to handle much more than that. Hence the switching. I wouldnt mind the midrange power and about 450whp out of a VVTi 2j. Id also like to hear one on the dyno with that much power.
The main thing VVTI does is vary the cam timing while the engine is running
Old VVTI does this hydraulically. New VVTI is electric.
VVTI is only on the intake cam, with the exception of the 4th gen altezza B.E.A.M.S. engine. The NA 2.0ltr 3SGE cranks out 210HP factory but can easily output ~300HP with out a turbo utilizing Standalone & sidedrafts.
Toyota has liked its performance so much they plan to use duel VVTI in the next gen scion & corolla to come.
VVTI allows you to vary your cam timing while the engine is running giving you more power on the whole powerband.
So in theory it can give you the same performance as an adjustable aftermarket cam gear but this sets at any RPM range. This can also give you great fuel economy.
The problem with it is its very hard to tune and requires an advanced ecu to manage vvti unless you dissable by changing the cam gear to fixed. Its been speculated some of the VVTI engines use weaker parts. Most tuners that want a 500HP + engine dont really care about the fuel economy and complex costly tunning.
So if you plan to keep your engine stock get VVTI if your good with wiring and dont care about stock HP numbers.
If you want a car to upgrade and run for performance get non-VVTI.
Old VVTI does this hydraulically. New VVTI is electric.
VVTI is only on the intake cam, with the exception of the 4th gen altezza B.E.A.M.S. engine. The NA 2.0ltr 3SGE cranks out 210HP factory but can easily output ~300HP with out a turbo utilizing Standalone & sidedrafts.
Toyota has liked its performance so much they plan to use duel VVTI in the next gen scion & corolla to come.
VVTI allows you to vary your cam timing while the engine is running giving you more power on the whole powerband.
So in theory it can give you the same performance as an adjustable aftermarket cam gear but this sets at any RPM range. This can also give you great fuel economy.
The problem with it is its very hard to tune and requires an advanced ecu to manage vvti unless you dissable by changing the cam gear to fixed. Its been speculated some of the VVTI engines use weaker parts. Most tuners that want a 500HP + engine dont really care about the fuel economy and complex costly tunning.
So if you plan to keep your engine stock get VVTI if your good with wiring and dont care about stock HP numbers.
If you want a car to upgrade and run for performance get non-VVTI.
Evilempire1.3JZ-GTE;1035003 said:
well said.. OT: sometimes I still think it could be fun to do a stripped mk3 with a beams 3s in it. the weight balance would be a utter work of art haha. I think you and I are the only real lovers of that motor and tech.
i really do think alltracs are one of the most underrated cars in the world...along with cosworths.
Im curious now...think it could be possible to adjust VVTi with a standard honda vtec controller? If it could then add that with a 264 exhaust...i think some good power numbers could be made....that would be some nifty tune for sure haha.
Im curious now...think it could be possible to adjust VVTi with a standard honda vtec controller? If it could then add that with a 264 exhaust...i think some good power numbers could be made....that would be some nifty tune for sure haha.
tturnpaw;1035369 said:
No, because VTECH is just off or on. The VVTi has a little more precision than that.
There are several standalone computers that can control them however, although honestly, if you left the stock ECU in there control it, I'm pretty sure you're going to get a near optimal curve.
annoyingrob;1035412 said:
Sorry, a little rusty on my hondarish. Im still intrigued, for some odd reason.
Dylan JZ;1034814 said:
yes 386 FT/lbs butt whatch at what RPM :aigo:
here in the Netherlands we se Newton / m