tooter's manifold adventure... - Page 72 - Toyota Yaris Forums

7:34pm · 06-07-2013, 01:49 PM

Quote:

Originally Posted by tooter

Hey Garm,

Injen sent out a good replacement tube, and the intake looks great!

It was late so I only got to run it to see if there would be a CEL. No light.

What vehicle is this?

Yoda · 06-07-2013, 04:03 PM

Quote:

Originally Posted by cali yaris

Remove your header and see how much power you lose with no exhaust at all. A LOT.

I can attest to that

Shinare · 06-07-2013, 05:34 PM

Quote:

Originally Posted by cali yaris

Remove your header and see how much power you lose with no exhaust at all. A LOT.

Well that's strange, I never would have guessed that would even affect the performance of a car. So exhaust pipes on the header make the engine work better rather than having nothing there to restrict... to me that's just really weird, hehe

CrankyOldMan · 06-07-2013, 07:09 PM

Quote:

Originally Posted by Shinare

Well that's strange, I never would have guessed that would even affect the performance of a car. So exhaust pipes on the header make the engine work better rather than having nothing there to restrict... to me that's just really weird, hehe

It's all based on the Helmholtz principle, the Bernoulli effect and fluid velocity. Lots of crazy physics and maths to explain it, but not really relevant unless you're into that sort of thing. Here's my understanding of it: escaping exhaust pulses down each tube (Helmholtz), drawing a slight vacuum on the adjacent tubes (Bernoulli). Velocity and pressure of a fluid in a tube is decreased by increasing the diameter. Decreasing the pressure means easier flow, but lower velocity and less scavenging effect...I think.

tooter · 06-07-2013, 09:36 PM

Quote:

Originally Posted by 7:34pm

What vehicle is this?

It's my 2012 Toyota Tacoma. I'm a forever diehard loyal Toyota owner.

tooter · 06-07-2013, 09:39 PM

Quote:

Originally Posted by Shinare

^^^ RE: "long tube header" - Please forgive this noob question, it really is a question and not a troll, but why does it matter the length of a pipe? Don't you want the exhaust to just get out via the back of your car rather than in the engine bay?

I just got it because it looks really neato.

TOUGEghost · 06-07-2013, 10:48 PM

Quote:

Originally Posted by tooter

Nice wheels!

cali yaris · 06-07-2013, 10:59 PM

^ he puts them on everything.

xnamerxx · 06-07-2013, 11:15 PM

Quote:

Originally Posted by Shinare

^^^ RE: "long tube header" - Please forgive this noob question, it really is a question and not a troll, but why does it matter the length of a pipe? Don't you want the exhaust to just get out via the back of your car rather than in the engine bay?

Its about exhaust scavenging. At a certain length and diameter, the exhaust pulse will create a sonic negative pressure wave at the valve creating a vacuum. That vacuum helps pull up on piston, clear out the cylinder, and suck fresh air into the cylinder. The exhaust itself still exits in the original location in most situations. On most otto cycle engines exhaust contributes to about 5-15% of the engines theoretical performance potential, on 2 stroke engines it can be as much as 40%.
In my case I picked up 7hp and 6 tq over a DC header with the long tube header I designed.

tooter · 06-08-2013, 12:53 AM

Quote:

Originally Posted by TOUGEghost

Nice wheels!

Thanks,

They were the closest truck wheel match to the ones on our Yaris.

CrankyOldMan · 06-08-2013, 06:31 AM

Quote:

Originally Posted by xnamerxx

In my case I picked up 7hp and 6 tq over a DC header with the long tube header I designed.

Is that design, by chance, available for the rest of us? I'm sure there's a thread, but I'm really lazy in the morning.

malibuguy · 06-08-2013, 07:37 AM

That header is georgeous. Do you have any pictures of inside the collector?

tooter · 06-08-2013, 11:52 AM

Sorry, no. But the runners are as clean and neat on the inside as it they are on the outside. And I agree, it's an excellent example of the exquisite beauty of flow design, and I bought it solely because of its visual appeal.

Note the similarity?

xnamerxx · 06-08-2013, 09:40 PM

Quote:

Originally Posted by CrankyOldMan

Is that design, by chance, available for the rest of us? I'm sure there's a thread, but I'm really lazy in the morning.

Nope, spent a bit too much time with it to show off.

tooter · 06-08-2013, 10:31 PM

Who could forget the freaking awesome sound of your dyno runs, namer?

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

I thought of your project every time I saw these.

But like you said, they only adjust for attitude, but not for length.

Had you come up with any other ideas to resolve the issue of engine arc travel? You seemed to be so close to a functional product.

xnamerxx · 06-08-2013, 11:45 PM

I did, it ended up being a bit of a compromise but a flex joint placed in the right place took care of that problem. So far I have 6+ momths of testing on the car and no failures to speak of(knock on wood).

The main reason I couldn't put it into production because I was never able to find a shop that I could get to mandrel bend the tubes for a reasonable cost. The total cost with labor and mending would have been well into the $1000+ range, so it didn't seem viable as something I could sell.

With all that being said I still don't get tired of the torque it produces, it almost feels like a jeep motor now.

tooter · 06-09-2013, 11:53 AM

I totally understand. New one-off products are always expensive. Could your header have a bung to accept the stock 02 sensor? And does it end before the stock cat? I'm just curious how much it alters the stock exhaust configuration. Oh, and does it hit anywhere under accel or decel?

xnamerxx · 06-09-2013, 03:26 PM

No it doesn't hit anywhere.
I'm not sure how it affects the stock cat configuration because I have a custom midpipe, but If I'm guessing you'd need to remove one and move the other. As for the o2 sensors it accepts both in close to the stock location. I chose to do that rather than move the o2 sensors since I have no way of modifying the timing delay for the o2 signal, the downside is I only read half the cylinders.

06-07-2013, 10:59 PM	#1286
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,857	^ he puts them on everything. __________________ 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.

06-08-2013, 07:37 AM	#1290
malibuguy Obsessed with 1.5L Drives: '10 PW Yaris Sedan Join Date: Feb 2011 Location: Westminster, MD Posts: 908	That header is georgeous. Do you have any pictures of inside the collector? __________________ -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

06-08-2013, 11:52 AM	#1291
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Sorry, no. But the runners are as clean and neat on the inside as it they are on the outside. And I agree, it's an excellent example of the exquisite beauty of flow design, and I bought it solely because of its visual appeal. Note the similarity? Last edited by tooter; 06-08-2013 at 01:19 PM.

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06-08-2013, 10:31 PM	#1293
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Who could forget the freaking awesome sound of your dyno runs, namer? http://www.youtube.com/watch?v=fpkgkDjwHVg I thought of your project every time I saw these. But like you said, they only adjust for attitude, but not for length. Had you come up with any other ideas to resolve the issue of engine arc travel? You seemed to be so close to a functional product.

06-08-2013, 11:45 PM	#1294
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I did, it ended up being a bit of a compromise but a flex joint placed in the right place took care of that problem. So far I have 6+ momths of testing on the car and no failures to speak of(knock on wood). The main reason I couldn't put it into production because I was never able to find a shop that I could get to mandrel bend the tubes for a reasonable cost. The total cost with labor and mending would have been well into the $1000+ range, so it didn't seem viable as something I could sell. With all that being said I still don't get tired of the torque it produces, it almost feels like a jeep motor now.

06-09-2013, 11:53 AM	#1295
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	I totally understand. New one-off products are always expensive. Could your header have a bung to accept the stock 02 sensor? And does it end before the stock cat? I'm just curious how much it alters the stock exhaust configuration. Oh, and does it hit anywhere under accel or decel?

06-09-2013, 03:26 PM	#1296
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	No it doesn't hit anywhere. I'm not sure how it affects the stock cat configuration because I have a custom midpipe, but If I'm guessing you'd need to remove one and move the other. As for the o2 sensors it accepts both in close to the stock location. I chose to do that rather than move the o2 sensors since I have no way of modifying the timing delay for the o2 signal, the downside is I only read half the cylinders.