My Long Tube header build - Page 3 - Toyota Yaris Forums

tooter · 11-19-2012, 07:22 PM

Looks really neatol!

Will you put the runners inside the flange holes?

xnamerxx · 11-19-2012, 07:32 PM

sorta I'm either going to flare the tube or cut and wedge the pipe in the flange. I matched the flange port diameter to that of the gasket so I don't induce any extra sharp edges that will mess up the initial shockwave from the exhaust.

I'm going to speak with the welder and see if I can get this started tonight.

tooter · 11-19-2012, 08:24 PM

I had a similar issue building the manifold, and had little "shelves" machined into edges of the ports to hold the runners in alignment while they were being welded up. It worked great because the weld filled in the shelf and covered it up smoothly...

...leaving the inside relatively clean.

Bluevitz-rs · 11-21-2012, 02:30 AM

are you going to dyno the results before and after?

MBSPE · 11-21-2012, 03:46 PM

nice work

xnamerxx · 11-21-2012, 05:04 PM

It will but I'm a ways from being able to weld the bung in place. It might be difficult to extend the primary length for the WR header which is what you would want to do.

Thanks :)

tooter · 11-21-2012, 07:04 PM

I only was thinking about lengthening the secondaries as its easier.

The logical place to cut would be at the first welded joint up from the bung where everything is pointing straight at each other.

xnamerxx · 11-21-2012, 07:10 PM

I don't think you'll see any benefits to doing so just because the primaries are far more important than the secondaries for base scavenging.

What I would do is cut the point before the primaries join get a u bend SS in the right diameter cut and bend it so the pipes sit on top of each other like a 4-1 and pull them out about 18-30"s and use the existing merges as a way to terminate the pipes.

Jason@SportsCar · 11-21-2012, 07:15 PM

Quote:

Originally Posted by tooter

I only was thinking about lengthening the secondaries as its easier.

The logical place to cut would be at the first welded joint up from the bung where everything is pointing straight at each other.

Cut the tubes off at the flange and start over, it would be less work.

A lot of fab guys hate coming in and trying to piece stuff together from an existing part - they seem to look at it as fixing the previous guys screw up. In the end the labor to piece together cost more than building from scratch.

tooter · 11-21-2012, 07:46 PM

Quote:

Originally Posted by Jason@SportsCar

Cut the tubes off at the flange and start over, it would be less work.

A lot of fab guys hate coming in and trying to piece stuff together from an existing part - they seem to look at it as fixing the previous guys screw up. In the end the labor to piece together cost more than building from scratch.

But I'm the fab guy.

Autocross72 · 11-23-2012, 03:57 AM

Subscribe

1.5 · 11-23-2012, 02:32 PM

oooo already a prototype. Good work Namer.

4/20 NEVER FORGET · 11-23-2012, 02:39 PM

Looks strangely similar to a dc header in that pic. :)

Awesome project, can't wait to see the finished product!

xnamerxx · 11-23-2012, 02:58 PM

Yeah i guess it kinda does...although i still need to add secondary pipes top it ;)

xnamerxx · 11-23-2012, 03:05 PM

Yeah i guess it kinda does...although i still need to add secondary pipes top it ;)

tooter · 11-23-2012, 03:14 PM

Quote:

Originally Posted by 4/20 NEVER FORGET

Looks strangely similar to a dc header in that pic. :)

It's a smart move to use a similar profile to the DC as it fits into the available space.

xnamerxx · 11-23-2012, 03:19 PM

I didn't borrow from any existing designs, but with the given lengths I need to work with it just happened to follow their design.

Jason@SportsCar · 11-23-2012, 04:07 PM

If you find yourself needing to test fit for clearance, my car is up in the air while I wait for the struts to be serviced.

11-21-2012, 03:46 PM	#5
MBSPE Custom Exhaust Drives: Yaris Sedan Join Date: Nov 2012 Location: Pasadena, MD Posts: 15	nice work __________________ -Greg @ MBS Custom exhaust fabrication! www.mandrelbend.com www.mandrelbendingsolutions.com

11-23-2012, 02:32 PM	#12
1.5 Form>Function Drives: 07 Flint Sedan Join Date: Dec 2009 Location: Tampa Posts: 4,018	oooo already a prototype. Good work Namer. __________________ Instagram: @southernstreets_phil Facebook.com/southernstreetsempire

11-23-2012, 04:07 PM	#18
Jason@SportsCar Drives: 2015 H Production Yaris Join Date: Oct 2009 Location: Debary, FL Posts: 1,953	If you find yourself needing to test fit for clearance, my car is up in the air while I wait for the struts to be serviced. __________________ 2005-2008 SCCA Solo BS National Champion 2017-2018 SCCA H Prod National Champion

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11-19-2012, 07:22 PM	#1
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Looks really neatol! Will you put the runners inside the flange holes?

11-19-2012, 07:32 PM	#2
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	sorta I'm either going to flare the tube or cut and wedge the pipe in the flange. I matched the flange port diameter to that of the gasket so I don't induce any extra sharp edges that will mess up the initial shockwave from the exhaust. I'm going to speak with the welder and see if I can get this started tonight.

11-19-2012, 08:24 PM	#3
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	I had a similar issue building the manifold, and had little "shelves" machined into edges of the ports to hold the runners in alignment while they were being welded up. It worked great because the weld filled in the shelf and covered it up smoothly... ...leaving the inside relatively clean.

11-21-2012, 02:30 AM	#4
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	are you going to dyno the results before and after?

11-21-2012, 05:04 PM	#6
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	It will but I'm a ways from being able to weld the bung in place. It might be difficult to extend the primary length for the WR header which is what you would want to do. Thanks :)

11-21-2012, 07:04 PM	#7
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	I only was thinking about lengthening the secondaries as its easier. The logical place to cut would be at the first welded joint up from the bung where everything is pointing straight at each other.

11-21-2012, 07:10 PM	#8
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I don't think you'll see any benefits to doing so just because the primaries are far more important than the secondaries for base scavenging. What I would do is cut the point before the primaries join get a u bend SS in the right diameter cut and bend it so the pipes sit on top of each other like a 4-1 and pull them out about 18-30"s and use the existing merges as a way to terminate the pipes.

11-23-2012, 03:57 AM	#11
Autocross72 Drives: 2009 3rd Polar white Join Date: Apr 2011 Location: Seattle Posts: 31	Subscribe

11-23-2012, 02:39 PM	#13
4/20 NEVER FORGET Drives: 2008 Yaris HB MT Join Date: Jan 2009 Location: Portland, OR Posts: 100	Looks strangely similar to a dc header in that pic. :) Awesome project, can't wait to see the finished product!

11-23-2012, 02:58 PM	#14
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Yeah i guess it kinda does...although i still need to add secondary pipes top it ;)

11-23-2012, 03:05 PM	#15
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Yeah i guess it kinda does...although i still need to add secondary pipes top it ;)

11-23-2012, 03:19 PM	#17
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I didn't borrow from any existing designs, but with the given lengths I need to work with it just happened to follow their design.