1zz Throttle body review/tips

[Rigaud]

Originally Posted by MedMantle

I still have the stock intake. Like 'scod' said, just give it all you've got! :P I had to turn my stock intake pipe around to get it to fit and it was still quite tight and difficult to get over, but I eventually got it. I would have loved to be able to use a adapter like that but we have almost no aftermarket car stuff where I live. :)

You don't get the full benefit of the 1ZZ TB with a stock air intake pipe/filter and stock intake manifold. Everything is 46mm while the 1ZZ is about 55mm. I did the same as you at first but ended up installing a proper tube and filter. Next is the intake manifold and port polish the head. Only way to benefit 100%

[MedMantle]

Originally Posted by Rigaud

You don't get the full benefit of the 1ZZ TB with a stock air intake pipe/filter and stock intake manifold. Everything is 46mm while the 1ZZ is about 55mm. I did the same as you at first but ended up installing a proper tube and filter. Next is the intake manifold and port polish the head. Only way to benefit 100%

Rigaud, what air intake did you use for your setup? Do you maybe have a picture? I'd imagine the ribbed stock intake pipe causes some disturbance with flow. I wanted to get an aftermarket intake (specifically the Injen CAI) mainly for eye candy.

In the future I'm gonna look at doing an engine swap to the 1.5 (yes, I am driving the 2NZ-FE ) and once I have the engine I'm gonna do a bit of work on it like porting and stuff regardless of the gains, mainly for fun though 'cause I'm still learning. I'm happy to hear there are still potencial gains to come :D

This forum was my first introduction to how cars work so my Yaris is kinda my guinea-pig :P

[phaznet]

Originally Posted by Rigaud

You don't get the full benefit of the 1ZZ TB with a stock air intake pipe/filter and stock intake manifold. Everything is 46mm while the 1ZZ is about 55mm. I did the same as you at first but ended up installing a proper tube and filter. Next is the intake manifold and port polish the head. Only way to benefit 100%

What options do we have for changing our intake manifold?

[CrankyOldMan]

Originally Posted by phaznet

What options do we have for changing our intake manifold?

Bolt-on options are pretty few and far between: golden eagle, MicroImage, and possibly Weapon-R. The Corolla manifold requires a custom TB adapter and machining a flange for the engine block. Tooter made a short run of them a few years back, and is no longer making them. If you want to go that route, I've posted a PDF of the flange dimensions in another thread.

[invader166]

Originally Posted by CrankyOldMan

Tooter made a short run of them a few years back, and is no longer making them. If you want to go that route, I've posted a PDF of the flange dimensions in another thread.

I'd actually be interested in going that route. It would be a cool project to take on. Which thread did you post the flange dimentions in?

[phaznet]

Originally Posted by invader166

I'd actually be interested in going that route. It would be a cool project to take on. Which thread did you post the flange dimentions in?

Me too!

[invader166]

Update: Ok. Found the template for the flange that can connect the 1zz intake manifold runners to the 1NZ engine block intake ports.

http://www.yarisworld.com/forums/sho...24&postcount=7

Beautiful piece of work. Thanks Cranky!

Next, gotta find some info on the bolt pattern adaptor for the throttle body...

[CrankyOldMan]

Originally Posted by invader166

Beautiful piece of work. Thanks Cranky!

Next, gotta find some info on the bolt pattern adaptor for the throttle body...

Thanks. The other adapter plate was made by tooter, but I don't think he published the design. I may have the dimensions for both bolt patterns in my CAD library and could post them if I do.

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