tooter's manifold adventure... - Page 21 - Toyota Yaris Forums

Bluevitz-rs · 07-27-2012, 11:09 PM

Did you think of maybe running a Corolla TB on it later on down the road?

tooter · 07-28-2012, 12:38 AM

Quote:

Originally Posted by Bluevitz-rs

Did you think of maybe running a Corolla TB on it later on down the road?

I don't think so, because I don't want to deal with trying to rig up throttle linkage and fighting ECU issues. It's much simpler just to run the stock Yaris throttle body.

4/20 NEVER FORGET · 07-28-2012, 05:52 AM

I thought I read a thread where people were using a corolla TB with no wiring/ecu issues. Plug and play. Why not go that route? My plan is to buy another stock intake manifold and port match it to a corolla TB.

tooter · 07-28-2012, 11:25 AM

Quote:

Originally Posted by 4/20 NEVER FORGET

I thought I read a thread where people were using a corolla TB with no wiring/ecu issues. Plug and play. Why not go that route? My plan is to buy another stock intake manifold and port match it to a corolla TB.

Can you find where you saw that? Is the Corolla throttle body also drive by wire?

anomoly40 · 08-13-2012, 03:17 PM

$2000? I guess i forgot how much machine shop time costs since my time is free.

tooter · 08-13-2012, 06:23 PM

Quote:

Originally Posted by anomoly40

$2000? I guess i forgot how much machine shop time costs since my time is free.

You can drink your coffee again...

...because that's not just for the single prototype, but for a small limited production run of tooters.

I even have the marketing slogan:

"if it sucks... it's a tooter"

Bluevitz-rs · 07-28-2012, 11:29 AM

http://www.yarisworld.com/forums/sho...=throttle+body
http://www.yarisworld.com/forums/sho...=throttle+body

there's been a few threads on it...

tooter · 07-28-2012, 11:44 AM

Thanks for the threads, Blue.

I don't think I want to get involved in drilling out rivets, swapping chips, cracking idle screws, and rerouting coolant lines just now. Right now I'm focused on just one project... the manifold. Things turn out the best when I only do one thing at a time.

CrankyOldMan · 07-28-2012, 11:35 AM

There have been very mixed results with the 4-bolt DBW Corolla TBs, ranging from no issues to abject failure. They are electrically compatible, but the only real benefit from using one (w/o engine management) is that you effectively open the throttle faster. The corolla has a larger diameter TB, so you allow more air flow for the same throttle signal.

Beyond that, I really don't know the specifics. There's the potential to lean out your AFR too much at WOT because the ECU isn't expecting that much air to be available, and the stock fuel maps may cause it to misbehave.

Going to a 3-bolt, cable throttle with a separate throttle position sensor (TPS) is only practical with standalone engine management (this is how Garm gets away with it) due to unresolved issues with the stock TPS signal. I believe that CTScott poked around with a scope and meter on a stock TB but wasn't able (?) to make sense of the signals.

There has been a good deal of debate and experimenting with this, but no magic bullet solution. It mostly comes down to the stock ECU being a "learning" unit, and it's not happy with signals outside of the expected range.

cali yaris · 07-28-2012, 11:55 AM

Quote:

First, because it it is plenty strong to take being pressurized,

The stock manifold will handle 20+ psi of boost. It's pretty strong. Chris Rado ran his time attack tC the whole first season with a stock plastic mani on it. On the Yaris, I haven't heard of one failing, and we have quite a few turbo kits out there running various levels of boost.

tooter · 07-28-2012, 12:15 PM

Thanks for the info, Garm.

I know nothing about forced induction, and just figured that the stock plastic OEM manifold was designed for vacuum and not pressure.

tooter · 07-28-2012, 05:15 PM

Test fitting time...

It's a drop in fit!

Did a little fine tuning with the Dremel. Since these were both undercuts, I just did them by hand...

Clears the fuel rail perfectly with ~almost~ zero clearance...

Ports matched flawlessly...

Next up: test fit the throttle body.

tooter · 07-28-2012, 06:40 PM

The flange is now a drop in fit, the throttle body bolts onto the adaptor like a dream, and the rest of the manifold has no clearance issues... ( goody

)

However... nothing else fits!

All of the hoses are going to need rerouting, and I'm going to have to find a way to (gulp!) lose 2 3/4 inches on the already super short ram intake to make the air filter fit. But these issues are minor compared to getting the manifold itself to work out.

packetrace · 07-28-2012, 05:10 PM

where did you bought the oem gasket ?

I will need to pickup a bunch of gasket :)

vten · 07-28-2012, 07:17 PM

Wow I like how the first pic look !

Bluevitz-rs · 07-28-2012, 08:46 PM

you should do a little cleanup of the head while the flange has no runners on it. would make it SUPER easy to 100% port match it and get rid of the casting marks.

tooter · 07-29-2012, 01:03 AM

Quote:

Originally Posted by Bluevitz-rs

you should do a little cleanup of the head while the flange has no runners on it. would make it SUPER easy to 100% port match it and get rid of the casting marks.

If the head was off the engine I'd give it a whirl. But with the head on, I don't want to risk getting metal chips in the engine.

Bluevitz-rs · 07-29-2012, 08:26 AM

Quote:

Originally Posted by tooter

If the head was off the engine I'd give it a whirl. But with the head on, I don't want to risk getting metal chips in the engine.

There's no risk if the valves are closed. Then just blow it out with compressed air.

08-13-2012, 03:17 PM	#5
anomoly40 Depot Damager Drives: '08 Liftback Join Date: Jul 2012 Location: Central Arkansas Posts: 35	$2000? I guess i forgot how much machine shop time costs since my time is free. __________________ 2008 Yaris Liftback - Bought in '12 with 80k Sold in '17 with 180k Bought back in '20 with 270k Currently collecting parts for the 2zr swap

07-28-2012, 05:10 PM	#14
packetrace Drives: Yaris Sedan 2009 Join Date: Sep 2010 Location: Quebec Posts: 566	where did you bought the oem gasket ? I will need to pickup a bunch of gasket :) __________________ Interior:ALL red, black roof Exterior:RTX scorpion painted GOLD, side and rear visor, oem spoiler, MI mesh grill, Hella supertone horn, RS badge, Vios badge, CF pillar, Led mirror cover, fog light HID 3000k, Projector retrofit HID 8000K Performance :MI CrankPulley, Tein springs, UR and TRD bar, TURBO IN PROGRESS Audio : Pionner DEH-80PRS, HAT L1V2, PowerBass 1100.5X 5 channel amp

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07-27-2012, 11:09 PM	#1
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Did you think of maybe running a Corolla TB on it later on down the road?

07-28-2012, 05:52 AM	#3
4/20 NEVER FORGET Drives: 2008 Yaris HB MT Join Date: Jan 2009 Location: Portland, OR Posts: 100	I thought I read a thread where people were using a corolla TB with no wiring/ecu issues. Plug and play. Why not go that route? My plan is to buy another stock intake manifold and port match it to a corolla TB.

07-28-2012, 11:29 AM	#7
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	http://www.yarisworld.com/forums/sho...=throttle+body http://www.yarisworld.com/forums/sho...=throttle+body there's been a few threads on it...

07-28-2012, 11:44 AM	#8
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Thanks for the threads, Blue. I don't think I want to get involved in drilling out rivets, swapping chips, cracking idle screws, and rerouting coolant lines just now. Right now I'm focused on just one project... the manifold. Things turn out the best when I only do one thing at a time.

07-28-2012, 11:35 AM	#9
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,333	There have been very mixed results with the 4-bolt DBW Corolla TBs, ranging from no issues to abject failure. They are electrically compatible, but the only real benefit from using one (w/o engine management) is that you effectively open the throttle faster. The corolla has a larger diameter TB, so you allow more air flow for the same throttle signal. Beyond that, I really don't know the specifics. There's the potential to lean out your AFR too much at WOT because the ECU isn't expecting that much air to be available, and the stock fuel maps may cause it to misbehave. Going to a 3-bolt, cable throttle with a separate throttle position sensor (TPS) is only practical with standalone engine management (this is how Garm gets away with it) due to unresolved issues with the stock TPS signal. I believe that CTScott poked around with a scope and meter on a stock TB but wasn't able (?) to make sense of the signals. There has been a good deal of debate and experimenting with this, but no magic bullet solution. It mostly comes down to the stock ECU being a "learning" unit, and it's not happy with signals outside of the expected range.

07-28-2012, 12:15 PM	#11
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Thanks for the info, Garm. I know nothing about forced induction, and just figured that the stock plastic OEM manifold was designed for vacuum and not pressure.

07-28-2012, 05:15 PM	#12
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Test fitting time... It's a drop in fit! Did a little fine tuning with the Dremel. Since these were both undercuts, I just did them by hand... Clears the fuel rail perfectly with ~almost~ zero clearance... Ports matched flawlessly... Next up: test fit the throttle body.

07-28-2012, 06:40 PM	#13
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	The flange is now a drop in fit, the throttle body bolts onto the adaptor like a dream, and the rest of the manifold has no clearance issues... ( goody ) However... nothing else fits! All of the hoses are going to need rerouting, and I'm going to have to find a way to (gulp!) lose 2 3/4 inches on the already super short ram intake to make the air filter fit. But these issues are minor compared to getting the manifold itself to work out.

07-28-2012, 07:17 PM	#15
vten Drives: red bare bone yaris hb 3dr Join Date: May 2009 Location: columbus Posts: 1,022	Wow I like how the first pic look !

07-28-2012, 08:46 PM	#16
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	you should do a little cleanup of the head while the flange has no runners on it. would make it SUPER easy to 100% port match it and get rid of the casting marks.