Long Tube Header Dyno results & Photo - Page 2 - Toyota Yaris Forums

PETERPOOP · 11-18-2008, 04:28 PM

wish i could run this but i'm planning on turboing later

pickledchang · 11-18-2008, 04:31 PM

Quote:

Originally Posted by hatchbackkid82

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...um... if you read the first post, you can see where he states it will be near $550. too bad im probably going to be out of cash from the manifold as well when/if he releases this for the xD. those are some seriously nice gains though, especially in the torque curve, good gains start around 3k rpms, i like :)

blacksandiegovitz · 11-18-2008, 06:06 PM

So this will be sold with a mid-pipe that will bolt up to aftermarket or stock axle-backs right ? Is there any dyno pulls with a yaris running the long tube header , mid-pipe , and the intake manifold ???? Would a yaris be able to lay down 130+ to the wheels with , only bolt-ons Ie : long tube header, Midpipe, intake , intake manifold , nst pulleys , and axle back muffler?

CASTREX · 11-18-2008, 06:14 PM

Quote:

Originally Posted by blacksandiegovitz

So this will be sold with a mid-pipe that will bolt up to aftermarket or stock axle-backs right ? Is there any dyno pulls with a yaris running the long tube header , mid-pipe , and the intake manifold ???? Would a yaris be able to lay down 130+ to the wheels with , only bolt-ons Ie : long tube header, Midpipe, intake , intake manifold , nst pulleys , and axle back muffler?

All your questions....

answered here:

http://www.yarisworld.com/forums/showthread.php?t=10840

whoguy · 11-18-2008, 07:05 PM

Richard..... the position of the O2 sensor is only on one exhaust pipe rather than at the join.

This will mean the o2 sensor will see lower readings and will run the engine rich......

Running rich may give the impression of more power/performance.

richardholdener · 11-18-2008, 07:33 PM

The oxygen sensor positon has no effect on the air/fuel ratio. You can run the sensor stuck in the end of the exhaust or in one individual tube, as long as each cylinder is runing the same-the readings will be identical. Not sure what you mean by lower readings or giving the impression of more power or performance. The dyno does not read impressions-it reads real numbers generated by the motor.

Quote:

Originally Posted by whoguy

Richard..... the position of the O2 sensor is only on one exhaust pipe rather than at the join.

This will mean the o2 sensor will see lower readings and will run the engine rich......

Running rich may give the impression of more power/performance.

whoguy · 11-18-2008, 07:39 PM

Thanks Richard.

I was thinking the same, that the Air/Fuel ratio should read the same regardless of position.

Sorry about me writing "Impression", I meant running rich WILL give more power/performance. That old resistor across the o2 sensor trick.

I'm with you now.

jkuchta · 11-18-2008, 10:27 PM

So....will this be available in 304 SS, or just the mild steel?

eTiMaGo · 11-18-2008, 11:26 PM

Quote:

Originally Posted by whoguy

Thanks Richard.

I was thinking the same, that the Air/Fuel ratio should read the same regardless of position.

Sorry about me writing "Impression", I meant running rich WILL give more power/performance. That old resistor across the o2 sensor trick.

I'm with you now.

Running rich does not actually give you more power, it's a common misconception. You actually have to run very slightly lean for the best combustion, if I recall correctly. You want to run richer in a turbo application so that the extra fuel acts as a coolant to prevent detonation.

CASTREX · 11-18-2008, 11:42 PM

Quote:

Originally Posted by eTiMaGo

Running rich does not actually give you more power, it's a common misconception. You actually have to run very slightly lean for the best combustion, if I recall correctly. You want to run richer in a turbo application so that the extra fuel acts as a coolant to prevent detonation.

Correct, rich (more fuel) does not mean more power. Is the other way around.

richardholdener · 11-19-2008, 12:12 AM

people get confused when they read rich or lean ads power. Optimum power comes from an optimum air/fuel mixture. This is usually 13.2:1 in an NA application and richer on forced induction applications-though a turbo motor very well at 13.2:1 air/fuel-just not for very long.

harveyjai · 11-19-2008, 02:05 AM

sorry to ask a dumb question...

but does that mean u can run this long header + bolt on muffler, no mid pipe?

AznGouki · 11-19-2008, 05:32 AM

damn this is sweet. 550 for head and mid sounds pretty good. I am concerned about the mild steel though. Being in Canada, wouldn't rust be a greater issue for me? In terms of power gains, so far you look the best. How much louder is the vehicle with this set up? Any chance for a sound clip?

richardholdener · 11-19-2008, 11:49 AM

It was real loud durign testing since we ran an open exhuast. Haven't run the system through a mid-pipe connected to axle back yet-we need to make sure there is sufficent interest before we make the production pieces. Sounded pretty cool at 6000 rpm!

Quote:

Originally Posted by AznGouki

damn this is sweet. 550 for head and mid sounds pretty good. I am concerned about the mild steel though. Being in Canada, wouldn't rust be a greater issue for me? In terms of power gains, so far you look the best. How much louder is the vehicle with this set up? Any chance for a sound clip?

anonymous user · 11-19-2008, 12:25 PM

Interested, but like others, fundage is tight right now. I may be able to commit sometime after december. Maybe january?

Yoda · 11-19-2008, 01:20 PM

does any1 one see that it is spit at the top. Never seen that on a header before. Was it a mistake or did it crack?

mikenacarato · 11-19-2008, 01:24 PM

i believe its for flexability. when the metal flange heats up if theres not a split it can warp and/or crack. its good to have a joint in there to allow expansion.

richardholdener · 11-19-2008, 01:35 PM

The split in the head flange was necessary to faciliate installation of the prototype. The header can't be installed if is is made as a full-length, 1-piece header. It will be a 2-piece design, but the production head flange will be 1 piece. The header will split mid-way down the primary tube-they will connect using a 4-bolt flange.

Quote:

Originally Posted by Yoda

does any1 one see that it is spit at the top. Never seen that on a header before. Was it a mistake or did it crack?

11-19-2008, 05:32 AM	#31
AznGouki Metsu Drives: NCP91 ; E36 Join Date: Oct 2008 Location: Calgary Posts: 154	damn this is sweet. 550 for head and mid sounds pretty good. I am concerned about the mild steel though. Being in Canada, wouldn't rust be a greater issue for me? In terms of power gains, so far you look the best. How much louder is the vehicle with this set up? Any chance for a sound clip? __________________

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11-18-2008, 04:28 PM	#19
PETERPOOP View User's Garage Drives: 08 white liftback Join Date: Oct 2008 Location: Oahu Posts: 3,674	wish i could run this but i'm planning on turboing later

11-18-2008, 06:06 PM	#21
blacksandiegovitz Your mom goes to college View User's Garage Drives: 08 Vitz Join Date: Oct 2008 Location: Just chillin' out brah ! Posts: 1,434	So this will be sold with a mid-pipe that will bolt up to aftermarket or stock axle-backs right ? Is there any dyno pulls with a yaris running the long tube header , mid-pipe , and the intake manifold ???? Would a yaris be able to lay down 130+ to the wheels with , only bolt-ons Ie : long tube header, Midpipe, intake , intake manifold , nst pulleys , and axle back muffler?

11-18-2008, 07:05 PM	#23
whoguy View User's Garage Drives: Yaris YRS Sedan Join Date: Sep 2006 Location: Sydney, Australia Posts: 65	Richard..... the position of the O2 sensor is only on one exhaust pipe rather than at the join. This will mean the o2 sensor will see lower readings and will run the engine rich...... Running rich may give the impression of more power/performance.

11-18-2008, 07:39 PM	#25
whoguy View User's Garage Drives: Yaris YRS Sedan Join Date: Sep 2006 Location: Sydney, Australia Posts: 65	Thanks Richard. I was thinking the same, that the Air/Fuel ratio should read the same regardless of position. Sorry about me writing "Impression", I meant running rich WILL give more power/performance. That old resistor across the o2 sensor trick. I'm with you now.

11-18-2008, 10:27 PM	#26
jkuchta View User's Garage Drives: 2007 Yaris hatch (red) Join Date: Sep 2007 Location: L.A. Posts: 557	So....will this be available in 304 SS, or just the mild steel?

11-19-2008, 12:12 AM	#29
richardholdener Drives: 2008 Yaris hatch Join Date: Oct 2008 Location: Las vegas, NV Posts: 183	people get confused when they read rich or lean ads power. Optimum power comes from an optimum air/fuel mixture. This is usually 13.2:1 in an NA application and richer on forced induction applications-though a turbo motor very well at 13.2:1 air/fuel-just not for very long.

11-19-2008, 02:05 AM	#30
harveyjai Touge Driver View User's Garage Drives: Yaris YRX Join Date: Oct 2008 Location: Sydney, Australia Posts: 82	sorry to ask a dumb question... but does that mean u can run this long header + bolt on muffler, no mid pipe?

11-19-2008, 12:25 PM	#33
anonymous user rarer than JDM -1 of 1! View User's Garage Drives: 07yaris Join Date: Oct 2008 Location: windward oahu Posts: 402	Interested, but like others, fundage is tight right now. I may be able to commit sometime after december. Maybe january?

11-19-2008, 01:20 PM	#34
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	does any1 one see that it is spit at the top. Never seen that on a header before. Was it a mistake or did it crack?

11-19-2008, 01:24 PM	#35
mikenacarato SIPNDEW View User's Garage Drives: 15 STI Join Date: Oct 2008 Location: Brentwood, TN Posts: 2,281	i believe its for flexability. when the metal flange heats up if theres not a split it can warp and/or crack. its good to have a joint in there to allow expansion.