tooter's manifold adventure... - Page 60 - Toyota Yaris Forums

malibuguy · 03-18-2013, 11:28 AM

they welded them like that for easy access & it smooths out the lip that would be there if they were externally welded

xnamerxx · 03-18-2013, 11:51 AM

^ that and it would be next to impossible to weld them externally.

JustDidIt · 03-18-2013, 12:12 PM

Interesting... whats the next step??

malibuguy · 03-19-2013, 11:33 AM

Quote:

Originally Posted by JustDidIt

Interesting... whats the next step??

procharger

tooter · 03-19-2013, 12:07 PM

Quote:

Originally Posted by JustDidIt

Interesting... whats the next step??

I don't exactly know just yet... I'm thinking about it while finishing another regular tooter.

For sure, I'll need to have a plain throttle body base plate made and figure out a way to attach it securely as the aluminium hemisphere shell is pretty thin. I was thinking of a short bellmouth on the inside like this extending a couple of inches into the center of the hemisphere directly aligned with the axis of the 4 runners so the flow is a straight line.

The throttle plate will use the same CNC information for the outer surface minus all of the adaption machining. It'll be one inch thick to raise the throttle body enough for the chip to clear the hemisphere.

Here a flow simulation for a bell mouth...

http://www.youtube.com/watch?v=jFwo_3IxZyo

If it works one way... it'll also work the other.

Bluevitz-rs · 03-19-2013, 08:42 PM

P.S. Tooter, you can clip that wire screen out of the gasket. Someone here flow benched a TB with and without it and it just causes restriction.

tooter · 03-20-2013, 01:15 AM

Quote:

Originally Posted by Bluevitz-rs

P.S. Tooter, you can clip that wire screen out of the gasket. Someone here flow benched a TB with and without it and it just causes restriction.

How many cfm difference did it make at WOT?

I was told that the screen helps to break up the positive crankcase venting oil fumes. Whenever a manufacturer makes a more expensive casting to fit a more expensive part, they have a good reason to do it.

Bluevitz-rs · 03-20-2013, 07:36 AM

If you were at all concerned about emissions you would have left the stock airbox in with the charcoal pre-filter. But no, that screen is there to make the air turbulent as it enters the stock plastic intake manifold.

tooter · 03-20-2013, 11:33 AM

Quote:

Originally Posted by Bluevitz-rs

If you were at all concerned about emissions you would have left the stock airbox in with the charcoal pre-filter. But no, that screen is there to make the air turbulent as it enters the stock plastic intake manifold.

Hey Blue... take a look at this flow simulation.

http://www.youtube.com/watch?v=WzWsUB79e-A

And look at this one that shows the difference in the timing of the air flow past each side of the butterfly...

http://www.youtube.com/watch?v=k-MN6igceog

Notice how the flow on the backside of the butterfly is way more turbulent than the tipped in side. This means that the screen actually helps to stabilize the turbulence the back side.

The person who did the flow testing must have had an instrument that generated a numerical comparison. Do you know how much cubic feet per minute that difference was?

Here's another one showing what happens on the backside of a butterfly in the flat position...

http://www.youtube.com/watch?v=0z_hFZx7qvE

A screen would help to stabilize the flow by breaking up those rotating eddys.

I've watched a lot of these simulations over and over again to help me to understand the dynamics of flow. It's totally fascinating.

Bluevitz-rs · 03-20-2013, 06:34 PM

I think it it was only a cfm more but didn't know about the airflow thing. Maybe it's better to leave it in then. I guess it's more of a part throttle thing than full throttle.

tooter · 03-20-2013, 06:57 PM

Quote:

Originally Posted by Bluevitz-rs

I think it it was only a cfm more but didn't know about the airflow thing. Maybe it's better to leave it in then. I guess it's more of a part throttle thing than full throttle.

I'm pretty sure you're right. I had already cut the screen off of on a O ring just to see what would happen and couldn't feel any difference, so I put another gasket back in with the screen.

tooter · 03-28-2013, 06:08 PM

Just finished up another tooter today...

We start on the throttle body base plate for the experimental tooter next week...

The design will combine the base plate and reverse velocity stack together in one part. Then I'll drill a hole in the hemisphere and have it welded into place.

CrankyOldMan · 03-28-2013, 06:19 PM

It's like necromancy, but with beautiful results!

junorico24 · 03-28-2013, 07:10 PM

Looks like something from star ship enterprise.

tooter · 03-28-2013, 07:19 PM

Quote:

Originally Posted by junorico24

Looks like something from star ship enterprise.

Yeah, it does sort of have that retro-futuristic space look...

I'll call it the tooter e.t.

cali yaris · 03-28-2013, 07:26 PM

rather phallic if you were to ask me...

tooter · 03-28-2013, 07:31 PM

I didn't ask because I already know the answer...

Bluevitz-rs · 03-28-2013, 07:43 PM

Quote:

Originally Posted by cali yaris

rather phallic if you were to ask me...

I had to look that word up LMAO!

03-18-2013, 11:28 AM	#1
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 908	they welded them like that for easy access & it smooths out the lip that would be there if they were externally welded __________________ -Greg...the Exhaust Freak. -10 PW sedan 107whp/110wtq, full exhaust, suspension bits, TRD LSD -06 Highlander 3mzfe Limited AWD -82 Malibu, 1uzfe swap -97 Tercel coupe, 1nzfe/4.31 -96 Tercel coupe, Turbo 5efe, autoX -96 Tercel 4dr

03-28-2013, 06:08 PM	#12
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Just finished up another tooter today... We start on the throttle body base plate for the experimental tooter next week... The design will combine the base plate and reverse velocity stack together in one part. Then I'll drill a hole in the hemisphere and have it welded into place. Last edited by tooter; 03-28-2013 at 06:21 PM.

03-28-2013, 07:26 PM	#16
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,857	rather phallic if you were to ask me... __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

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03-18-2013, 11:51 AM	#2
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	^ that and it would be next to impossible to weld them externally.

03-18-2013, 12:12 PM	#3
JustDidIt Drives: '08G2T Prius Join Date: Oct 2012 Location: United States Posts: 163	Interesting... whats the next step??

03-19-2013, 08:42 PM	#6
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	P.S. Tooter, you can clip that wire screen out of the gasket. Someone here flow benched a TB with and without it and it just causes restriction.

03-20-2013, 07:36 AM	#8
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	If you were at all concerned about emissions you would have left the stock airbox in with the charcoal pre-filter. But no, that screen is there to make the air turbulent as it enters the stock plastic intake manifold.

03-20-2013, 06:34 PM	#10
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	I think it it was only a cfm more but didn't know about the airflow thing. Maybe it's better to leave it in then. I guess it's more of a part throttle thing than full throttle.

03-28-2013, 06:19 PM	#13
CrankyOldMan 2ZR swap. DO IT! Ask how! View User's Garage Drives: 09 Meteoric Metallic HB Join Date: Feb 2011 Location: West Michigan Posts: 2,332	It's like necromancy, but with beautiful results!

03-28-2013, 07:10 PM	#14
junorico24 Drives: toyota yaris yrs Join Date: Jun 2007 Location: Sydney Posts: 642	Looks like something from star ship enterprise.

03-28-2013, 07:31 PM	#17
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	I didn't ask because I already know the answer...