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11-19-2012, 11:07 AM | #37 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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cool
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11-19-2012, 04:38 PM | #38 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
|
Just picked this up from the shop
I need to do some finish work on it but overall everything came out better than I hoped. |
11-19-2012, 06:22 PM | #39 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Looks really neatol!
Will you put the runners inside the flange holes? |
11-19-2012, 06:32 PM | #40 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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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, 07:24 PM | #41 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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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. |
11-19-2012, 09:11 PM | #42 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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All cleaned up and ready to be welded on :)
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11-21-2012, 12:05 AM | #43 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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Well its time for me to post a real update
I now understand why Richard Holdener went with a 4-1 design its so much easier to package and get the correct length out of. I'm about 1/3 to about a 1/2 of the way finished with the primaries. Thank god the welder who is helping me out had experience building motorcycle race exhausts because I made some bone headed mistakes. All in all my primaries are longer than the stock primaries and my secondaries will be cake on top of that. So to keep you guys tided over here is a picture of the first tube being tacked in place. |
11-21-2012, 01:01 AM | #44 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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It's so exciting to see your project begin to take shape.
It's like creating a work of functional art! What are you using to cut the tubing so cleanly? |
11-21-2012, 01:25 AM | #45 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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I'm a bit fortunate to have access to shop equipment but I've been cutting everything with a band saw, grinder, or belt sander.
So in order to get the clean cuts after I make the initial cut I deburr the edge of the tube both inside and out and it makes that nice clean lines, makes it way easier to weld as well apparently too. I can't take all the credit though, I'm getting lots of help from the welder on how to properly work with tubing. I'm amazing on how much work it is to make these pipes, its been quite fun, but quite a bit of work. I wish I took some more pictures after I got the collector on but it was getting late and I needed to home. Hopefully I'll get the other 2 pipes welded up tomorrow and a initial test fit to see if everything's kosher. Something I thought was a bit funny but my primaries right now on my tri-y header are longer than the primaries on the stock header and I still have about 2 feet of secondaries to add. |
11-21-2012, 01:30 AM | #46 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
Location: Oshawa, Ontario, Canada
Posts: 2,967
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are you going to dyno the results before and after?
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11-21-2012, 02:26 AM | #47 | |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Quote:
(just joking ) |
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11-21-2012, 10:28 AM | #48 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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I have dyno results from when I was stock, but I'm going to dyno it against a DC header after its been vetted.
LOL its going to be close but thats all I'm going to say Another taste ;) |
11-21-2012, 02:30 PM | #49 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
Location: Los Angeles
Posts: 1,961
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Is your header going to have an 02 sensor bung? I was thinking of chopping my WR header in half and adding a couple of straight tubes to lengthen it.
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11-21-2012, 02:46 PM | #50 |
Custom Exhaust
Drives: Yaris Sedan Join Date: Nov 2012
Location: Pasadena, MD
Posts: 15
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nice work
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11-21-2012, 04:04 PM | #51 |
0-60 in slow
Drives: light blue liftback Join Date: Aug 2009
Location: so cal
Posts: 926
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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, 06:04 PM | #52 |
play every day
Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012
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Posts: 1,961
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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, 06:09 PM | #53 |
Drives: 2015 H Production Yaris Join Date: Oct 2009
Location: Debary, FL
Posts: 1,953
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Good stuff, cant wait to see dyno numbers.
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2005-2008 SCCA Solo BS National Champion 2017-2018 SCCA H Prod National Champion |
11-21-2012, 06:10 PM | #54 |
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. |
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