tooter's manifold adventure...

[4/20 NEVER FORGET]

Originally Posted by tooter

I don't think I'll be dynoing it with a 1ZZ as I'm more of an economy driver than a performance one. The manifold is not only designed for the 1ZZ throttle body, it was also designed for a 1.8 engine so I don't think it would make that much difference in an normally aspirated application. However, a forced induction situation would be a completely different story. Even at the tooter's best +4hp at 5,600rpm that isn't nearly enough to be detected in actual driving. And remember that's at wide open throttle. Most driving is at partial throttle, where the difference between the tooter and stock manifold is too slight to feel. We've been running it on our daily driver Yaris for over 2,000 miles now and it works just fine. And the stock air box really quiets down the intake.

You're killing me here, man. You've come so far that not sourcing a 1ZZ TB and dynoing it seems weird to me, like you're aborting the project early. You even had the TB adapter made to match the 1ZZ throttle body, yet you aren't going to at least try and get one?

[tooter]

Originally Posted by 4/20 NEVER FORGET

You're killing me here, man. You've come so far that not sourcing a 1ZZ TB and dynoing it seems weird to me, like you're aborting the project early. You even had the TB adapter made to match the 1ZZ throttle body, yet you aren't going to at least try and get one?

Ok, I'll get one and dyno it even though that wasn't the goal.

Making the tooter fit both throttle bodies without any extra parts was an afterthought so that I wouldn't have to stock 2 adaptors. In fact it actually fits three, the stock 51mm three bolt cable controlled throttle body.

I still think that the results will be similar as these back to back runs (stock:red tooter:blue) done on the same day...



the stock engine is only capable of taking in so much air/fuel.

[4/20 NEVER FORGET]

Originally Posted by tooter

Ok, I'll get one and dyno it even though that wasn't the goal.

Making the tooter fit both throttle bodies without any extra parts was an afterthought so that I wouldn't have to stock 2 adaptors. In fact it actually fits three, the stock 51mm three bolt cable controlled throttle body.

I still think that the results will be similar as these back to back runs (stock:red tooter:blue) done on the same day...

Back when I worked on Hondas, when we would swap intake manifolds, whenever possible we would include whatever the largest stock throttle body that would fit the manifold. I think we have a similar case here, while not a huge bottle-neck, it's a bottle neck to the system, and you did make the adapter to fit the larger throttle body.

I'm sorry if I came off harsh at all in my last post, I've enjoyed this thread and your tinkering that has led you to where you are. It's a good looking manifold, and it was designed for a larger throttle body than that which you are using, and it's an easy swap to the larger 1ZZ. You have to at least try :) I think there are many others who are following the thread that are also very interested. I think with the change will come more tinkering, and more content too. I appreciate the informative posts.

[tooter]

Originally Posted by 4/20 NEVER FORGET

Back when I worked on Hondas, when we would swap intake manifolds, whenever possible we would include whatever the largest stock throttle body that would fit the manifold. I think we have a similar case here, while not a huge bottle-neck, it's a bottle neck to the system, and you did make the adapter to fit the larger throttle body.

I'm sorry if I came off harsh at all in my last post, I've enjoyed this thread and your tinkering that has led you to where you are. It's a good looking manifold, and it was designed for a larger throttle body than that which you are using, and it's an easy swap to the larger 1ZZ. You have to at least try :) I think there are many others who are following the thread that are also very interested. I think with the change will come more tinkering, and more content too. I appreciate the informative posts.

Hey Never,

No offense taken. I just got this 1ZZ 0D030 throttle body off ebay today...




...and will be running it soon. I read through the whole 1ZZ thread, and it looks like a real pain in the ass to get working half way decently with all the floating idles, wildly racing rpms, stripped screws, and repeated check engine lights. Hopefully, I can avoid some of the pitfalls knowing the experiences others have gone through.

I at least have some advantages over trying to make it work with the plastic stock manifold. The Corolla manifold was originally engineered for a 1.8 throttle body, and the tooter adaptor I designed will fit it perfectly.

I'll let you know exactly how all this shakes out.

[tooter]

Originally Posted by 4/20 NEVER FORGET

You're killing me here, man. You've come so far that not sourcing a 1ZZ TB and dynoing it seems weird to me, like you're aborting the project early. You even had the TB adapter made to match the 1ZZ throttle body, yet you aren't going to at least try and get one?

THANK YOU!

[JustDidIt]

Originally Posted by 4/20 NEVER FORGET

You're killing me here, man. You've come so far that not sourcing a 1ZZ TB and dynoing it seems weird to me, like you're aborting the project early. You even had the TB adapter made to match the 1ZZ throttle body, yet you aren't going to at least try and get one?

Originally Posted by tooter

THANK YOU!

Awesome read!

[4/20 NEVER FORGET]

Originally Posted by tooter

THANK YOU!

No dude, THANK YOU!!! I am so happy you got it running good finally, and that there seems to be a noticeable difference. Looking at the two throttle bodies side by side, you would think there would have to be. The stock TB is so small!

Anyways, this has been a great thread to follow, and I know I can speak for the entire community when I say thanks for posting so often and clearly about the issues and wins you have been having. These threads help us all out. Again, congrats, and I can't wait to see what this sucker does on the dyno. Please post a vid with audio! I bet she screams!

[jetblast]

Staring at pic............................................... .................................................. .................................................. .................................................. .................................................. .................................................. ...........still staring at pic............................................... .................................................. .................................................. .................................................. .......damn nice.............................................. .................................................. .................................................. .................................................. .......still staring.

[tooter]

Originally Posted by 4/20 NEVER FORGET

No dude, THANK YOU!!! I am so happy you got it running good finally, and that there seems to be a noticeable difference. Looking at the two throttle bodies side by side, you would think there would have to be. The stock TB is so small!

Anyways, this has been a great thread to follow, and I know I can speak for the entire community when I say thanks for posting so often and clearly about the issues and wins you have been having. These threads help us all out. Again, congrats, and I can't wait to see what this sucker does on the dyno. Please post a vid with audio! I bet she screams!

Hey man, thanks for the kind words...
From this experience I'm pretty certain that the chips don't even need to be swapped. The butterfly just needs to close farther so that the ECU can find the right idle. Because when I ran both chips, both had the same symptoms. Reducing the idle speed alone is what resolved all of the issues.

So in the future...
If anyone wants to install a part number 030 Corolla 1ZZ throttle body on their 1NZ engine, don't mess with the chips, and simply turn the idle down by backing out the little idle adjustment screw counterclockwise one turn using a 5/64th inch hex key... and everything should work just fine.

I did quite a bit of driving today on the freeway and in traffic with shopping and running errands, and I'm so thoroughly pleased with how well the engine responds with the bigger throttle body.

It behaves like a completely different car!

[JustDidIt]

Originally Posted by tooter

If anyone wants to install a part number 030 Corolla 1ZZ throttle body on their 1NZ engine, don't mess with the chips, and simply turn the idle down by backing out the little idle adjustment screw counterclockwise one turn using a 5/64th inch hex key... and everything should work just fine.

Wonder if this works on my 1NZ-FXE....

[tooter]

Well... maybe.

Although hybrids use an Atkinson cycle engine which is quite different from regular Otto cycle engines. Atkinsons fire once per revolution, whereas Ottos fire once for every two revolutions.

So this means that your ECU likely has totally different running parameters seeing as the engine spins the generator to charge the batteries. That completely different style of intake manifold is the tipoff. It looks like it is made to operate optimally in a very narrow rpm range.

The bolt spacings are:

67mm
71mm
76mm

They'll also need to be in the right orientation and not flipped over. So if the 76.. is on the right and in a vertical position, the top left will be 67mm and the bottom left will be 71mm like this...



See if they match yours.

[Bluevitz-rs]

Originally Posted by tooter

Well... maybe.

Although hybrids use an Atkinson cycle engine which is quite different from regular Otto cycle engines. Atkinsons fire once per revolution, whereas Ottos fire once for every two revolutions.

I think you're confusing it with a 2 stroke. Atkinson cycle is the same as Ottos. The only difference is that Atkinson has a shorter compression stroke than power stroke. On the Prius, this is achieved through intake cam timing and duration. The intake valve is held open much longer allowing some of the intake charge to be pushed back on the compression stroke reducing the energy required to compress the intake charge. This in turn rises the efficiency of the engine by effectively making the power stroke longer extracting more energy.