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11-12-2006, 01:43 AM | #19 |
Helping a friend to ask, does the header fits the old 05 Echo HB? thanks.
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11-12-2006, 08:26 AM | #20 |
Drives: 2011 Rogue Join Date: Jan 2006
Location: Brampton, Ontario, Canada
Posts: 231
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Want....need....can't spend money....
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11-12-2006, 10:45 AM | #21 | |
The LittleBastard
Drives: 2007 Yaris Liftback Join Date: Sep 2006
Location: Los Angeles, CA
Posts: 297
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Quote:
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Yaris Mods: 20% Tints Ground wires 2007 Toyota Yaris Liftback - Current 2004 Honda S2000 - Sold 1986 Toyota Corolla SR5 - Sold DIY: Groundwire Kit |
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11-12-2006, 10:55 AM | #22 | |
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Let me know cause I am extremely interested!!!
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11-12-2006, 11:34 AM | #23 |
Drives: 2007 Black Yaris sedan Join Date: Sep 2006
Location: Atlanta
Posts: 884
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Yes,the chart looks good till about 4500rpm,then performance degrades.A 4-1 will be better from that point on,I want more oomph when Im already traveling at 75 mph,about 3200rpm,and want to floor it,Ill reach top end faster with a 4-1.Now I will say a 4-2-1 will be slightly,and I mean slightly better for accelaration,only because it will give alittle mor back pressure,somthing you dont want when the engine is wide open.Just wait till we test the Megan headers,youll see.
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11-12-2006, 02:52 PM | #24 |
Drives: Yaris Join Date: Nov 2006
Location: San Francisco
Posts: 46
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I have seen these 4-1 and 4-2-1 header convo's on many forums..
it's to each their own. but back to basics.. For example.. ( Im just here to give info.) 95% of Honda Race Headers are 4-2-1. These guys look for the biggest gap in BASE and after dyno runs. The most important things is TORQUE, Not Horsepower. Torque PULLS you and Gives you that OMMPH.. 4-2-1 does not give more back pressure. It's all about the pairing of the firing pattern of the exhaust and how the exhaust scavenges out of the cylinder head and how it gets pulled out of the header into the exhaust. Think of how the engine works. Cylinder 4&1 are up while 2&3 are down. Thats the engine cycle. Our header is set up to scavenge the exhaust gases out of the engine as fast as it can hence the 4-2. And finally when the two different pulses of exhaust gases are merged they push each other out. If you can understand this, you will start to understand why 4-2-1 headers are better and more effecient than a 4-1 header. As you can see 4-1 headers dont take much design and or any R&D at all. Just run all the tubes into one collector. Lets let the dyno sheets speak for themselves. Here are some examples for you. http://www.scionlife.com/forums/view...ht=mmw++header http://www.scionlife.com/forums/view...w++header+dyno http://www.scionlife.com/forums/view...ht=mmw++header http://www.scionlife.com/forums/view...ht=mmw++header |
11-12-2006, 07:41 PM | #25 | |
Banned
Drives: LB Join Date: Jul 2006
Location: OH
Posts: 7,787
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If you're going to compare two products, it would be good to at least mention both, rather than mention one 200 times and mention the other once.
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I smell bias. Go read up kiddies, the 4-2-1 vs. 4-1 debate is up in the air and differs depending on the car and the rest of the components with it. |
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11-12-2006, 08:27 PM | #26 | |
Drives: Yaris Join Date: Nov 2006
Location: San Francisco
Posts: 46
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We do not slam on anyone. im just here to provide info. Im just pointing out other peoples thoughts on 4-2-1 headers. Im simply pointing out 4-1 & 4-2-1 designs. Here are some other companies that make the same kind of headers. http://www.hytechexhaust.com/ http://www.comptechusa.com/ http://www.rcrewracing.com/forum/viewtopic.php?t=103 Jst a few to mention. |
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11-12-2006, 08:35 PM | #27 | |
Cousin Vitz
Drives: Yaris RS 5DR / Vitz RS wannabe Join Date: Mar 2006
Location: Vancouver, Canada
Posts: 1,082
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Quote:
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2007 Yaris RS Hatchback Black Sand Pearl 5DR MT
DIY Speaker Spacer/Bracket Template for Yaris Hatchback http://www.yarisworld.com/forums/showthread.php?t=1930 |
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11-12-2006, 08:53 PM | #28 |
Banned
Drives: LB Join Date: Jul 2006
Location: OH
Posts: 7,787
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He isn't a supporting vendor yet, I can question him all I want.
He'd say anything to sell some headers. Let me guess, people with 4-2-1 headers are generally larger down there, right? |
11-13-2006, 06:40 AM | #29 |
I had already decided that I wanted a 4-2-1 over a 4-1 for midrange gains and driveability. I'm not building a drag racer - this is my daily commuter. I also think a manufacturer should do testing as part of the design process rather than after the sale - just me I guess.
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11-13-2006, 09:44 AM | #30 |
The LittleBastard
Drives: 2007 Yaris Liftback Join Date: Sep 2006
Location: Los Angeles, CA
Posts: 297
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I agree with Violin. I wanted a 4-2-1 design for the yaris aswell. I believe the Yaris will benefit better with a 4-2-1 design then a 4-1. Top end gains are going to be similar with either one, but it's bottom end hat is going to be benefited with the 4-2-1 design. My car is my daily commuter and I want to improve on city driving as much as possible. However even for those thinking of tracking their yaris...your going to want to improve on your midrange with this car a lot more then just top end numbers.
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Yaris Mods: 20% Tints Ground wires 2007 Toyota Yaris Liftback - Current 2004 Honda S2000 - Sold 1986 Toyota Corolla SR5 - Sold DIY: Groundwire Kit |
11-13-2006, 12:20 PM | #31 | |
Drives: Nissan NX2000 Join Date: Nov 2006
Location: Canada
Posts: 12
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Quote:
http://www.honda-tech.com/zerothread/1780476 this header was obviously just thrown together Looks like it didn't help much either [cough]18hp gain[/cough] |
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11-13-2006, 12:36 PM | #32 |
Drives: Yaris Join Date: Nov 2006
Location: San Francisco
Posts: 46
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I was talking about Honda's.. With some kind of VTEC.
That was a SR20 NA.. Like i said ... 4-1 heades are easy to make, alot easier than a 4-2-1. That was my point. You dont have to agree with me.. Get me a car to run it on and i will prove it to you.. thats all. we dont need to go back and forth about these little things. Just let the dynos speak for themselves. |
11-13-2006, 01:22 PM | #33 |
Drives: 2007 Black Yaris sedan Join Date: Sep 2006
Location: Atlanta
Posts: 884
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Like I said,a 4-1 design will be better after 4500rpm,and looks like it might be just as good in the low rpm band from that example,but remeber folks,your going to pay $350.00 for the headers from WR,plus shipping and tax,when you can pay $190.00 for the Megan headers,and low low end diffrence is not even noticable between the 2,and the Megan headers will be better at the high end,this should not be a hard choice,save some money and get the better headers,Megan headers.
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11-13-2006, 02:13 PM | #34 | |
Quote:
However, I may be wrong.
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11-13-2006, 02:38 PM | #35 |
50% borikén
Drives: 06 Mazda5, 90 240sx Join Date: Nov 2006
Location: Omaha, somewhere in middle america
Posts: 166
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Might as well put in my $0.02.
From what I remember & I've been told (back in my V8 days) 4-1 or longtube headers are more for WOT/drag racing because the exhaust doesn't have much in the way of restriction...but as a result you lose low RPM power/torque. With the 4-2-1 style headers you get better drivability because (when properly engineered) the layout of the tube and the order in which they come together helps scavange or suck exhaust out which is supposed to help low end power. So, in short... 4-1 better for drag racing 4-2-1 better for daily driver If you're bored you can always read this...Header-Exhaust Design Effects on Engine Power. |
11-13-2006, 03:32 PM | #36 |
Drives: Absolutely Red Liftback Join Date: Aug 2006
Location: San Diego, CA
Posts: 570
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Alright so who's going to volunteer to head a Group Buy on this header? And put me down for one, please
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