tooter's manifold adventure...

[tooter]

I combined the Simota intake tube with the BLOX velocity stack because the Simota is larger in diameter which matches the larger diameter of the Corolla throttle body throat...



Now no adaptor coupling is needed, as everything is all the same size straight through from the velocity stack to the throttle body...



Notice the throttle body?... you'd never know that was an 8 year old junkyard part. Stainless steel micro bead blasting makes the old casting look like it's brand new.

I think I'll go for a ride now.

[discomark10]

Glad to hear you got it running sweet!
cant wait for the dyno!

[suckerface]

That's awesome you got it all straightened out. I wanted to adjust the idle screw on mine, but it didn't bother me enough to go out of my way to take the time to do it. Now I kind of wish I had...however, I agree, the throttle response is AMAZING! My fiance, who used to have a Yaris, even commented on the difference it makes!

Can't wait to see what the dyno puts down for you!

[tooter]

Originally Posted by suckerface

That's awesome you got it all straightened out. I wanted to adjust the idle screw on mine, but it didn't bother me enough to go out of my way to take the time to do it. Now I kind of wish I had...however, I agree, the throttle response is AMAZING! My fiance, who used to have a Yaris, even commented on the difference it makes!

Just came back from running errands in town, and the engine runs so GOOD.

I can't believe that it works so much better than the stock throttle body. Especially in low rpm response. You barely touch the pedal and the car is right up to speed. Haven't taken it on the freeway yet, but I'll do that tomorrow. It's all gassed up and ready to take mileage readings.

Can't wait to see what the dyno puts down for you!

Neither can I. I'm so excited!

Now the 1.8 throttle body matches the 1.8 manifold as well as the oversized SRI.

[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.

[tooter]

Originally Posted by Bluevitz-rs

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.

You're right. Hybrid engines acheive the Atkinson effect with valve timing.

Found this by searching How does a Prius hybrid engine work:

"Its engine only runs at an efficient speed and load - In order to reduce emissions, the Prius can accelerate to a speed of about 15 mph (24 kph) before switching on the gasoline engine. The engine only starts once the vehicle has passed a certain speed. And once the engine starts, it operates in a narrow speed band."

The bottom line is that installing a different throttle body on the engine might impair the optimum performance in that very narrowly tuned rpm range.

This explains why they use that weird intake manifold.

[JustDidIt]

Originally Posted by tooter

In order to reduce emissions, the Prius can accelerate to a speed of about 15 mph (24 kph) before switching on the gasoline engine. The engine only starts once the vehicle has passed a certain speed. And once the engine starts, it operates in a narrow speed band."

Currently I have enabled the EV mode hack which is standard on the EU and JDM Gen2 Prius This allows the prius to use the Electric motor only up to 34mph as long as the there isn't much demand for power. If I romp on the gas from the start - during heavy acceleration or hills both the ICE and MG2 move the car along.

Because I use the Torque android app paired thru Bluetooth with the ELM327 to monitor the cars sensors (no OEM tachometer) I can see the ICE running & RPM at all most all times except during stops at lights when the ICE shuts off to conserve gas.

Originally Posted by tooter

The bottom line is that installing a different throttle body on the engine might impair the optimum performance in that very narrowly tuned rpm range.

This explains why they use that weird intake manifold.

If I wanted to maintain the MPG vs HP, i'd prob leave the intake manifold and throttle body as is....but since HP is more what I am looking for with MPG to spare....guess I won't know unless I try. :)

[tooter]

Originally Posted by JustDidIt

If I wanted to maintain the MPG vs HP, i'd prob leave the intake manifold and throttle body as is....but since HP is more what I am looking for with MPG to spare....guess I won't know unless I try. :)

That's the spirit.
If it doesn't work out you can always simply go back to stock.

[JustDidIt]

Ya, I get snickered at often over at the PriusChat - buncha eco modders.. But its my car, I'll do what i want. I read up on the Bonneville Salt Flats Prius



When they set the 'record' in the G2 Prius, they did it by swapping the 1NZ-FXE for the 1.5L 1NZ-FE otto cycle motor swap from echo, modified the intake routing (but used the 1NZ-FXE intake manifold - no room for the 1NZ-FE manifold because of the Invertor and MG1&MG2 configuration under the hood), JDM TRD ECU, inverter upgrade (550V from 500V), final gear changes, transmission cooling system, custom 1-off suspension, larger front diameter tires and custom exhaust.

[cali yaris]

What was the record, and how long was the course?

final gear changes

How did they do that with a CVT?

[JustDidIt]

Originally Posted by cali yaris

What was the record, and how long was the course? How did they do that with a CVT?

How - dunno?? Not a lot of info on this: The transmission final drive gear ratio for the gas engine was modified from the stock 4.23:1 to 3.2.

Toyota's Landspeed Prius gas-electric hybrid vehicle debuted in Bonneville, Utah as the first production hybrid to race across the Bonneville Salt Flats. The advanced technology of the popular hybrid mid-size sedan was taken to another level as Car and Driver editor Aaron Robinson drove the modified Prius on the three-mile short course, and set a hybrid record speed of 130.794 miles per hour. Other Landspeed Prius drivers included Prius executive chief engineer Shigeyuki Hori, and Fumiaki Kobayashi, group vice president technical and regulatory affairs, Toyota Motor North America, Inc. The Landspeed Prius' historical run also paved the way for a hybrid class to run at Bonneville.

http://www.youtube.com/watch?v=fjKntmE4jlA

http://www.theautochannel.com/news/2...21/308572.html

This was all done in 2004... so prob not much of a record anymore. Jetta set one this past year at 186mph but using a 1.4L with a turbo. Class - H/PS. The class is for production cars with engines of less than 1.5 liters that use forced induction. So not in the same class as the Prius...

The all-new 2013 Jetta Hybrid marries a 1.4-liter turbocharged, direct-injection four-cylinder TSI® gasoline engine with a seven-speed DSG® dual-clutch automatic transmission and an electric motor. The combined output of the engine and electric motor is 170 horsepower, along with 184 pound-feet of torque.