1zz Throttle body review/tips

[LTHatch]

MedMantle:Your Yaris is a 2nzfe 1.3? Have a look at this thread: http://www.yarisworld.com/forums/showthread.php?t=53087
Japle did a bunch of dyno runs with his 1nzfe yaris, for some reason his 1nzfe came with the 2nzfe intake manifold. After installing the 1nzfe intake manifold he gained 14whp, just a guess here but i think the 1nzfe intake manifold may be an upgrade to the 2nzfe guys. You definitely won't gain the power Japle did but there might be a few horsepower in there to gain.

[MedMantle]

Wow, that is amazing!! I'm actually still contemplating doing the engine swap to a 1NZ-FE! I just wanna make double sure that it's plug and play. It is my first car and the only car I drive and wouldn't want to sit with problems! I'm stupid when it comes to understanding HP figures.. how much of a difference would I feel going from 1.3l to 1.5l? is it worth the $1500 I roughly worked out for the engine and labour?

And just a side note, it has been a week driving with my TB, no problems apart from the high rev on startup! Can definitely feel the difference, especially when I accelerate after a gear change! :D

[LTHatch]

The difference would be noticeable, but worth 1500 that's completely up to your judgement. Being a plug n play swap i have no clue, but give it a few days i'm sure someone who has done it can give you the run down on all it takes to swap it.

Did the TB swap make your intake louder? How is your low end torque and mid range torque also?

[MedMantle]

It might cost a lot less and will work out a lot cheaper than doing anything else to my 1.3 :P will wait and see! :)

I originally had my OEM intake flipped with the filter exposed but the day I put the TB in I replaced my filter and mounted everything up stock, so unfortunately my intake got softer anyways. It does seem throatier, but it's hard to tell with my cat-back exhaust noise :/

I seriously feel a difference in all area's! Launching feels a lot more responsive and "grippier" and hill climbs feel a tad better! The biggest difference is in changing gears for me, it feels nearly seamless compared to the jerky nature it originally had... maybe it's all in my head? lol, but I'm happy and it only cost me $104 in total :) oh and I can hear and feel the extra air coming in when I depress the accelerator completely and my exhaust tone seems "higher" at that point than it normally was, so it MUST mean something! :D

[LTHatch]

Very nice MedMantle, are you planing any other mods in the near future for your Yaris?

[MedMantle]

I was planning a lot of things, but money is tight so I'm thinking more realistically.. gonna focus more on cosmetics and luxury! My sister traded in her T-sport for the 1.3 and moved to America, damn :'( , it's a tough downgrade but I'm making the best of it :P

Just recently fitted OEM Electric Windows that I bought second hand, I had to make the main harness though but so far so good!

I'm saving hard now to get the money to buy some lowering springs. I was gonna wait a bit longer and get coil-overs but I'm not dedicated enough to get the whole stance look so a decent drop is all I'm interested in!

I'm trying to keep the car as stock looking and sounding as possible, that is why I just went for a 8" sub and it's the reason I'm gonna get my cat-back "softened". I removed all my stickers and allready sold my angel-eyes..
I just kinda had a mindset change and its cost me a lot but I don't regret any of my purchases that I'm undoing! :P

[KTS]

I agree that the 1zz throttle body is a great mod. I loved driving my 2007 Vitz RS with it. The car had much better throttle response its quite noticeable

Is it worth doing this mod with the Blitz Supercharger Kit?? What you guys suggest?

I have the S/C installed about a month now and the car drives great. Can it really drive that much better if I install the 1zz tb. Of course I will have to port match the intake pipe.
Also if I do port match the intake will I be able to reinstall the 1nz tb with out any issues?

[invader166]

Is it worth doing this mod with the Blitz Supercharger Kit?? What you guys suggest?

Absolutely! By increasing the diameter of your throttle-body, you're further improving the air-flow by providing less restriction for the air to reach the intake manifold. More air means you can increase your air-fuel ratios.

Just be careful, there is a limit on how much the engine can sustain.

[KTS]

thanks invader166.

[HANZO_187]

Ok so I'm back from the dead...!!!

Hanzo is BACK!!

What are the parts for the throttle bodies that fit the 1NZ-FE?

I have the sedan, and I'm looking to make some good gains.
I read a few different tb's people have used and some have twisted the hex bolt and some haven't.

I haven't read through these threads lately, if some one could appoint me to the Throttle Body thread and can someone tell me if TOOTER still does custom work??

Miss this Forum, glad to be back!!

[phaznet]

Finally installed the 1zz from a corolla, got the part from the local wrecking yard.
The only part # I could find was the ODO31. At first I got a check engine light, diagnosed it and 5 things came up. The next day the check engine light was gone :) I'm glad I wont have to do the chip swap!!!

The engine starts with a high idle, close to 3000 rpm. Only thing now is that epoxied screw. Going to tackle that now and post back.

Also, for anyone not sure about whether they want to do this mod - DO IT!!! You will feel a difference, especially if you've done other performance mods to your Yaris.

[MedMantle]

After riding tonight I must say that after 100KmPH in 5th gear I can definitely feel the car pulling much harder and climbing in speed way faster! So definitely a improvement on the top end as well! One day I'll get the courage to port match my Intake Manifold to the TB and see what it does :P

[phaznet]

I'm stuck!

This damn epoxied bolt/screw. I can't turn the damn thing. I've chipped away all the epoxy, plus used a tiny bit of paint thinner to eat away at the epoxy. I tried something a member did, which was to tap a slightly larger diameter hex key, but I couldn't torque it enough to get it to turn, it just stripped it.

I need help!

[CrankyOldMan]

I did the same thing with mine. I ended up drilling it out and replacing it with a 1/4-20 bolt

Sent from my XT1031 using Tapatalk

[phaznet]

That seems a bit risky, but I might use it as a last resort. How long is the screw? What is it holding/pushing?

[CrankyOldMan]

Yeah, you need to remove it from the intake completely. I don't recall the length, probably 1 1/4" socket head cap screw. It's for adjusting the idle position of the butterfly valve.

Sent from my XT1031 using Tapatalk

[phaznet]

Finally got that screw to turn, was the hardest part of install for me.

I've turned it 1 full rotation counter clockwise, but I haven't really noticed a difference!

How much did you guys turn it?

Thanks

[scod4025]

With mine needed to get a tach on it to get it to idle right ended up buying a scan gauge II and then got it dialed in right and was closer to about two and half turns in to get it to 700 rpm at idle