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01-04-2019, 11:00 PM | #1 |
Drives: 2007 Yaris hatch Join Date: Jun 2017
Location: NY
Posts: 135
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Is a header a good upgrade?
Thinking about getting either the DC Sports header or Weapon R as my next upgrade. Read conflicting reviews on which is better. The DC gives more gains up top and Weapon R gives better gains lower in the range. The DC used the stock heat shield and the WR does not - not sure how important that is. My car is an automatic, with a Tein Street Advance Z suspension, a K&N drop in and Tanabe Medallion Touring axle back. I know most opinions seem to say that the axle back doesn't give any gains, but after 5 months of use I still feel like my car has more pep than stock. My wife noticed it too and actually commented on it without my prompting, which confirmed my impression.
The header seems like a good next step, but wondering how much actual difference I'll notice. Any input and advice is appreciated. |
01-04-2019, 11:45 PM | #2 | |
Drives: MR2 Spyd/Type R/Yaris/Civic Si Join Date: Feb 2007
Location: Ottawa
Posts: 479
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Quote:
My advice = the header is soo inexpensive, and its a relatively easy install to do yourself so why not just do it?
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01-04-2019, 11:59 PM | #3 |
Drives: 2007 Yaris hatch Join Date: Jun 2017
Location: NY
Posts: 135
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Thanks. I agree, its like $240 or so, which is not too bad for a couple of HP IMO and I happen to like and trust the butt dyno (couple of HP on actual dyno equals 3-10 on the butt dyno)
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01-05-2019, 01:08 AM | #4 |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Neither header uses the heat shield, it is not necessary and can be removed without issue
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No one ever wants to give a Yaris the point by... |
01-06-2019, 08:30 AM | #5 |
daily driver
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Go DC
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01-06-2019, 07:17 PM | #6 |
Drives: 05 Echo Join Date: Jul 2009
Location: Waterford Ontario
Posts: 131
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None of the headers I've seen for these motors are great because they all fit the stock dimensions, but I don't think you would see a noticeable difference between any of them including the cheap ones on ebay
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01-07-2019, 08:48 AM | #7 |
daily driver
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Have you actually used one?
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01-07-2019, 01:04 PM | #8 | |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Having run the DC header on my 1nz I can say that there was an improvement more so in the upper ranges of the powerband. It is worthwhile IMO due to the relatively low cost and ease of install, but it is not a large change. For that you would need to run a long tube header (such as that for the 2zr) which involves a much more complicated install ad the midpipe needs to be changed to accomodate this. Currently no company if fabricating a long tube header for the 1nz, although Yawsport out in Cali may potentially be willing to do it with a few changes from their 2zr header they are currently fabricating
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No one ever wants to give a Yaris the point by... |
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01-07-2019, 03:21 PM | #9 | |
Drives: 05 Echo Join Date: Jul 2009
Location: Waterford Ontario
Posts: 131
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For sure it's an upgrade, just not a big one due to the packaging constraints. I'm going to see if I can modify one of the cheapies by cutting off the flange to extending the collector and taper it down from 2 1/4" to 2". |
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01-07-2019, 12:26 PM | #10 |
It's the illusion you see
Drives: 07 Yaris Sedan Aero Join Date: Oct 2006
Location: Brossard, QC
Posts: 3,888
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My exhaust manifold is starting to rust and have a small hole near the flange where it meets the cat.
I'll be seeking replacement very soon. Sent from my CLT-L04 using Tapatalk |
01-09-2019, 01:59 AM | #11 |
Drives: Corolla 1.8 Join Date: Oct 2010
Location: 1
Posts: 20
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If you have a cat right after the header. It will become a main bottleneck, better to upgrade it at the same time.
Header reduces engine temperature. Please take a look at Mazda skyactive g engine header |
01-10-2019, 02:20 AM | #12 |
Super Newbie
Drives: 2007 Yaris Liftback White Join Date: Jul 2007
Location: 626, Southern California
Posts: 180
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The DC headers are a worthy upgrade. Installed mine last April and I replaced the stock exhaust gasket and manifold gasket while I was at it since I was at 150k. Good midrange to upper gains. Power still falls flat after about 5.5k rpms though. I just have a short ram intake and the exhaust is stock.
When I first installed my short ram intake, it just made a lot of noise trying to pass cars but the Yaris didn't really "move". After installing the headers, the car makes noise and MOVES now. Nothing crazy, but I believe the headers improved drivability? Yeah that's it, drivability. Still slow as sh*t though.... |
01-15-2019, 09:50 PM | #13 |
Drives: 2007 yaris 3 door Join Date: Sep 2015
Location: Denver, Colorado
Posts: 1,000
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Weapon-R: it's tri-y design gives better gains and scavenging at lower rpm. it would come down to where you mostly drive. if you are +70% open highway driving then the 4-1 DC design would be better. if you mostly do city driving; stop-and-go and traffic lights, the 4-2-1 Weapon R will give better performance at the lower RPM
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01-17-2019, 12:06 PM | #14 |
Drives: 05 Echo Join Date: Jul 2009
Location: Waterford Ontario
Posts: 131
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Tri Y headers don't work on inline 4 cylinders. The pulses are too far apart to affect scavenging and if that's the one I'm thinking of the primaries are way too big anyway.
But none of them have correct primary lengths and sizes, and there's no collector to speak of either. That's the packaging problems I mentioned before. |
02-03-2019, 12:22 AM | #15 | ||||
Drives: 2007 Yaris hatch Join Date: Jun 2017
Location: NY
Posts: 135
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