Throttle Body Swap Fail, help needed

[Ryze268]

Hey guys,

I have a 1300cc 2NZ-FE with a tiny 3 bolt throttle body. I recently attempted to upgrade it to a 51mm TB from a 1.8 7AFE corolla engine.

http://www.yarisworld.com/forums/showthread.php?t=51176

Unfortunately it didn't fit, the vacuum point didn't line up and the stock bolts are too short :thumbdown:.

My next attempt to upgrade the throttle body relies on one you awesome fellas on the forums.

The stock US Yaris intake manifold uses 4 bolt throttle bodies, it should also mount directly to my engine.

I would like to know if anyone would be willing to sell me the stock intake manifold.

It would be greatly appreciated.

-Justin

[tooter]

Hey Justin,

Sorry, man... :frown:
My CNC engineer had told me two months for a throttle body adaptor, but now he isn't available to do any of my tooter stuff. He's totally occupied working on really big projects now so I'm out of luck.

That's a better idea just to get a stock intake manifold. It would be way cheaper than an adaptor. :smile:

Greg

[Ryze268]

Its all good Greg, trial and error is key to moving forward.

The hardest part will be finding a used manifold, I haven't seen any on eBay.

[Bluevitz-rs]

So as per your other thread, we said the 1ZZ throttle body works and you get one from a 7AFE :confused:

Um, why?

[IllusionX]

? OP have a 2002, which have a cabled TB.

[Bluevitz-rs]

I have a 2005, which also has a cable TB and so does the corolla before '03 with 1ZZ

[IllusionX]

OH.. interesting, cuz i kept reading about 1zz DBW TB...

[Bluevitz-rs]

Just like the 1NZ went from cable to wires, as so did the 1ZZ.

[mr_miles]

I might be able to get my hands on a stock intake manifold for you. I had an extra and a friend was going to use it on his XB, but he never did. I'll ask him if he still has it.

[Ryze268]

So as per your other thread, we said the 1ZZ throttle body works and you get one from a 7AFE :confused:

Um, why?

Also in that same thread, we discussed that my stock throttle body is 3 bolt while a 1zz throttle body is 4 bolt and wouldn't work. The 7AFE trottle body was the largest 3 bolt I could find.

I might be able to get my hands on a stock intake manifold for you. I had an extra and a friend was going to use it on his XB, but he never did. I'll ask him if he still has it.

Thanks much, I'd really appreciate it

[Bluevitz-rs]

http://www.ebay.com/itm/351087676377


Sent from my iPod Touch

[Ryze268]

http://www.ebay.com/itm/351087676377


Sent from my iPod Touch

Sorry but that looks exactly like the one I have which didn't fit, I'll post some pictures when I get a chance

[Bluevitz-rs]

http://www.clubxb.com/forums/showthread.php?t=28510


Sent from my iPod Touch

[Ryze268]

Thanks, it seems I have the 1zz throttle body after all but as suggested in that thread, I'll have to do some modding.

Thanks

[Bluevitz-rs]

did you get this working?

[Ryze268]

did you get this working?

Sadly I didn't, got some longer bolts, made the sandwich plate, installed everything and had a massive vacuum leak between the intake manifold and the tb.

I don't know but it seems the 2NZ-FE manifold is way smaller :iono:. I don't even think this mod makes sense on the stock manifold as the entry point on the manifold itself is about 35mm :thumbdown:.

I'm going to try and source a 1NZ intake manifold or port out the stock one I have.

Trial and error is necessary, hopefully I'm helping someone who might attempt this as well

[tooter]

Sadly I didn't, got some longer bolts, made the sandwich plate, installed everything and had a massive vacuum leak between the intake manifold and the tb.

I don't know but it seems the 2NZ-FE manifold is way smaller :iono:. I don't even think this mod makes sense on the stock manifold as the entry point on the manifold itself is about 35mm :thumbdown:.

I'm going to try and source a 1NZ intake manifold or port out the stock one I have.

Trial and error is necessary, hopefully I'm helping someone who might attempt this as well

There are always challenges to adapting things to an unintended purpose. A 2NZ FE intake manifold is on ebay for $118. It includes free domestic shipping so that would offset some of the cost to ship where you are.

Greg

[CrankyOldMan]

I don't know but it seems the 2NZ-FE manifold is way smaller :iono:. I don't even think this mod makes sense on the stock manifold as the entry point on the manifold itself is about 35mm :thumbdown:.
...
Trial and error is necessary, hopefully I'm helping someone who might attempt this as well

I reached a similar conclusion about the 1ZZ throttle body on the Blitz supercharger: the hole in the mounting face on the intake tube was the diameter of the stock TB, so I had to make a custom adapter that used the larger gasket, then connect the adapter with silicone couplers to a different version of the Blitz intake tube. Even if the original Blitz intake tube wouldn't have leaked, there would be very little HP gain because of the small tube inner diameter.

It took almost a year (on the calendar) to get all of the custom parts purchased and fabricated, and three separate tries to machine the adapter. I could repeat the process in about a week if I needed to, but the first attempt always takes me a long time. The next change will be to find and remove the new bottleneck, but that's probably going to require custom fabrication of cast or welded parts.

[Bluevitz-rs]

Maybe just an upgrade to a 1NZ manifold and throttle body might be all the upgrade you need. It would make sense that the 2NZ TB is smaller than the 1NZ.


Sent from my iPod Touch

[tooter]

That's an excellent suggestion. :smile:
An issue would be converting from cable to drive by wire. If I had a cable, I'd stick with it. The throttle response is so much better than electronic controls.

Greg

[Bluevitz-rs]

That's an excellent suggestion. :smile:
An issue would be converting from cable to drive by wire. If I had a cable, I'd stick with it. The throttle response is so much better than electronic controls.

Greg

Why would he convert to drive by wire?

[Ryze268]

Sounds good, still trying to source a 1NZ intake manifold. How far off is a 2ZZ intake manifold in terms on bolting up to our NZ engines?

[tooter]

Why would he convert to drive by wire?

Actually he wouldn't if Toyota makes 4 bolt cable operated throttle bodies. I wasn't aware they did, but I could always be wrong.

Greg

[CrankyOldMan]

The TB on my 1st gen Sienna was a 4-bolt cable style. I think I've seen some in the junkyard before. No idea if they're the same bolt pattern, and I'm sure they're HUGE compared to the one he already has.

[Bluevitz-rs]

Actually he wouldn't if Toyota makes 4 bolt cable operated throttle bodies. I wasn't aware they did, but I could always be wrong.

Greg


Re read the first post.


Sent from my iPod Touch

[CrankyOldMan]

Crap. Now that we've completely derailed the thread, perhaps we can figure out if a 1NZ intake manifold would work?

[Ryze268]

I'm sure it will, I just need to find one first.

How far off are the inlet ports between an 2zz manifold & a NZ engine, Do you think an adapter would make sense?

[Bluevitz-rs]

A 2ZZ manifold will not fit a 1NZ or 2NZ. It's ports for one are probably close to twice the size and is designed for an engine with an 8000+ RPM redline.


Sent from my iPod Touch

[fnkngrv]

1nz intake manifolds can be found easily. if anything ypu can find them all the time on facebook groups with folks from PTR on them.

[Ryze268]

A 2ZZ manifold will not fit a 1NZ or 2NZ. It's ports for one are probably close to twice the size and is designed for an engine with an 8000+ RPM redline.


Sent from my iPod Touch

Good thing I asked before I bought one.

1nz intake manifolds can be found easily. if anything ypu can find them all the time on facebook groups with folks from PTR on them.

Find me for cheap and I'll love you forever :laugh:

[fnkngrv]

Good thing I asked before I bought one.



Find me for cheap and I'll love you forever :laugh:

What do you consider cheap? You do realize that you are saying this in a Yaris community so in my book cheap is very relative....seems like expensive here is cheap elsewhere :thumbsup:

[Ryze268]

What do you consider cheap? You do realize that you are saying this in a Yaris community so in my book cheap is very relative....seems like expensive here is cheap elsewhere :thumbsup:

A new one is $100 on ebay so $50 for a used one seems reasonable

[fnkngrv]

I can sell you my stock intake for 50 plus shipping. only thing is it wouldn't ship for a week due to business travel.

[Ryze268]

I can sell you my stock intake for 50 plus shipping. only thing is it wouldn't ship for a week due to business travel.

Just PM me when you get back :thumbsup:

[Ryze268]

did you get this working?

I finally got around to doing the swap (3 bolt cable TB) yesterday, here is what I discovered;

The 1ZZ TB Requires longer bolts

A special 'gasket' had to be made

The Throttle Cable is it's stock position is too short

The car idles EXTREMELY high, minimum of 2000 RPM > http://youtu.be/XTNK8QxzM08

I'm still troubleshooting, hopefully I'll get it sorted out.

[Bluevitz-rs]

You'll need to back the idle adjuster screw off a bit. It's set to idle a 1.8L.


Sent from my iPod Touch

[Ryze268]

You'll need to back the idle adjuster screw off a bit. It's set to idle a 1.8L.


Sent from my iPod Touch

I did, it's completely backed out

[Bluevitz-rs]

You must have a vacuum leak somewhere then.


Sent from my iPod Touch

[Ryze268]

You must have a vacuum leak somewhere then.


Sent from my iPod Touch

Yes, I'll make a fresh gasket tomorrow.

Something I noticed is that my rev limit increased. It's topping out at 6700 rpm now, Not sure how that happened.

Regarding the cable being too short, I think this will have to be my solution;

http://img144.imageshack.us/img144/3851/dsc0266l.jpg

[Bluevitz-rs]

Did you port match the intake manifold.


Sent from my iPod Touch

[Ryze268]

Did you port match the intake manifold.


Sent from my iPod Touch

Yes I did, when I took it for a spin the engine felt more responsive. The hesitation I had with the smaller TB was no longer there.

I made a new gasket and it still wouldn't idle below 1500 rpm, I grew frustrated and put back on the stock TB.

I'm going to leave it to continue my turbo build.

I'll revisit this swap when I figure out where the leak is coming from.

[Bluevitz-rs]

It could be the idle air speed controller.

I know the bypass port look very different between the two throttle bodies.


Sent from my iPod Touch

[Bluevitz-rs]

If they can be swapped between the two, maybe that's the problem.


Sent from my iPod Touch

[Ryze268]

If they can be swapped between the two, maybe that's the problem.


Sent from my iPod Touch

Is that the sensor which is on the side with the coolant lines?