Benefits of going VVT-i? Options

[Random_Stranger]

Ok, so I just found out that VVT-i was like dual variable valve timing for HP and TQ. So anyone know how this is beneficial or worse in let's say a 3sgte engine? As I am aware there is a 4th gen engine that has this VVT-i technology (I think).

(I had made a n00b out of myself with the original posting, so I made this thread up to make up for it in another n00bish fashion, but with more to gain from it than my original thread, so my bad.)

This post has been edited by Random_Stranger: Dec 28, 2009 - 6:58 AM

[Smaay]

They're not exactly the same, but they are the same concept. VVTi is now VVTLi - which includes lift and can be found on most Toyota motors.

the only engine with Lift is the 2ZZ-GE in the 7th gen celica.


and you guys have no clue about VVT. yes economy is part of the reason for it, but VVT allows the cams to adjust to maintain a flat torque curve thus the horsepower to rise. goto newcelica.org and look at all the dyno sheets posted. horsepower just keeps climbing and torque remains flat. look at a car like the 3S-GTE. both curves rise then reack peak and fall off. which is why people changes cams. so those curves can be shifted. the benifits of VVT is that with some ECUs and piggyback you can adjust the valve timing making more power. let me give you an example.....in my 7th gen celica. i was making about 415 HP under 25psi. once we started adjusting the VVT tuning. i made over 130HP giving me 545HP.

VVT has amazing possibilities. you just have to know how to harness it

[HaysoosKreesto]

They're not exactly the same, but they are the same concept. VVTi is now VVTLi - which includes lift and can be found on most Toyota motors.

the only engine with Lift is the 2ZZ-GE in the 7th gen celica.


and you guys have no clue about VVT. yes economy is part of the reason for it, but VVT allows the cams to adjust to maintain a flat torque curve thus the horsepower to rise. goto newcelica.org and look at all the dyno sheets posted. horsepower just keeps climbing and torque remains flat. look at a car like the 3S-GTE. both curves rise then reack peak and fall off. which is why people changes cams. so those curves can be shifted. the benifits of VVT is that with some ECUs and piggyback you can adjust the valve timing making more power. let me give you an example.....in my 7th gen celica. i was making about 415 HP under 25psi. once we started adjusting the VVT tuning. i made over 130HP giving me 545HP.

VVT has amazing possibilities. you just have to know how to harness it

Out of curiosity, how do you keep your tires from spinning? As I understand it, anything above 300 hp is bad tire spin for FWD.

[richee3]

Out of curiosity, how do you keep your tires from spinning? As I understand it, anything above 300 hp is bad tire spin for FWD.

Depends on the weight of the car. For example, a Nissan Maxima/Toyota Camry/any other full size FWD car like that wouldn't spin near as bad as a Celica. In the instance of a 6th gen Celica, you can put a limited slip tranny in the car to reduce wheel spin.

That's an awful lot of power though, and I would imagine wheel spin is unavoidable. It's just a matter of how best to reduce it.