DC Sports Header install and evaluation - Page 10 - Toyota Yaris Forums

xnamerxx · 12-02-2012, 12:07 AM

the slight knock it causes in flow won't make much of a difference.

tooter · 12-02-2012, 01:49 AM

Quote:

Originally Posted by xnamerxx

the slight knock it causes in flow won't make much of a difference.

... especially when its just a trailing edge with alternating pulses coming through each runner.

1.5 · 12-02-2012, 06:04 PM

Tolmach yours also does not have the ceramic coating. I thought all DC headers for the yaris came coated.

Is it a replica? Poor build quality, alteration of branding, and lack of ceramic coating... sounds like a Rep.

TOLMACH · 12-02-2012, 10:09 PM

Quote:

Originally Posted by 1.5

Tolmach yours also does not have the ceramic coating. I thought all DC headers for the yaris came coated.

Is it a replica? Poor build quality, alteration of branding, and lack of ceramic coating... sounds like a Rep.

Mine looks pretty much the same in terms of build quality and finishing as other dc headers that I see here.

I bought mine from the vendor that is listed as official dealer at DC sports web-site (LSD motorsports) - do not have reasons not to trust these guys.

Alteration of branding - kinda suspect producers of replica would do a proper replication ))

Golddeenoh · 12-02-2012, 11:00 PM

Tolmach, your pipes look kind of small as well but then again my Megan Racing header is 3mm larger diameter but i wouldn't think that i could tell the size difference in a picture with out side by side comparison.

NJ Drive · 12-02-2012, 11:55 PM

Can someone measure the I.D. on one of the primaries on this header? It looks similar to the OEM and somewhat smaller than the Weapon R header.

TOLMACH · 12-03-2012, 12:18 AM

^ Mine measure 31 mm = 1.22 inches

NJ Drive · 12-03-2012, 05:18 PM

So perhaps the Weapon R is the closest port-matched of the two considering the amount of soot on the OEM. Anyone have an I.D. of an exhaust port?

xnamerxx · 12-03-2012, 05:49 PM

I measured 35mm for the port and 40mm for the gasket.

NJ Drive · 12-03-2012, 06:39 PM

Quote:

Originally Posted by xnamerxx

I measured 35mm for the port and 40mm for the gasket.

Thanks. I have to be honest- the more I gather reading about 'bolt-on' solutions, I'd rather buy one of yours, assuming you find appreciable gains. I don't doubt that you will.

I intend to run a single hi-flow with a Burns muffler anyway, so might as well do it right.

xnamerxx · 12-03-2012, 08:58 PM

I was once told by a GM engineer that the absolute best solution and absolute worse solution for exhaust is generally only a few % different. I've taken this advice to heart knowing the expected gains and losses can only be so much.

I do expect gains but the dyno and racing will be the true test if it actually works, I have simulation numbers, but those aren't always accurate to the real world.

If you want an easy/cheap solution ots parts work, but have the same design constraints production parts have, so you won't get the "best" solution. I can tell you this I noticed a significant loss of low-mid-range torque with the DC header while getting a size-able gain in topend torque. If you look at my dynosheet you can see that the DC produces a sizeable dip between 2700-3800 rpm, it feels really gutless out of slower corners but nice up top.

4/20 NEVER FORGET · 12-03-2012, 09:39 PM

I have to defend the DC header, as I think it's been the single best bolt-on since I started messing with this car.

First mod was a K&N typhoon intake, other than more engine noise, I didn't feel much change.

Second mod was the DC header. I noticed no mid-range torque loss and a noticeable change to the way the top end acted. The engine breathed better in the top end, instead of running out of steam before redline like before. The power across the board seems more linear. Despite the cost I would recommend the header.

Last engine mod I've done is a resonator-back obx exhaust. I didn't really notice any seat of the pants change from this.

Now with these mods the car is easier to drive. It's surprising torquey in 5th gear, I don't have to downshift to 4th gear any more when going up hills on the highway, even with passengers. It still doesn't have the top end that my Honda cars had, which it probably never will. It pulls really well in the 3000-5500 range though for a 1.5L. Overall I'm happy with the mods, I/H/E are worth it in my opinion.

TOLMACH · 12-04-2012, 01:06 PM

Gone trying to install my header.. wish me luck ))

(First day of annual vacation.. sooo nice)

cali yaris · 12-04-2012, 01:58 PM

^ Good luck, and congrats on vacation time!

tooter · 12-04-2012, 04:16 PM

Do show us pics of your project, and jack up the front of the car. It makes getting to the headpipe bolts sooo much easier from the bottom.

TOLMACH · 12-04-2012, 05:14 PM

Quote:

Originally Posted by tooter

Do show us pics of your project, and jack up the front of the car. It makes getting to the headpipe bolts sooo much easier from the bottom.

^ Thanks guys.. just finished.. took me circa 3 hours (I am kinda slow).

^Tooter: I am pretty sure you can do the whole thing without jacking a car - you just need to be a giant octopus

Will post pics and quick impressions later today.

Golddeenoh · 12-04-2012, 06:02 PM

Quote:

Originally Posted by TOLMACH

^Tooter: I am pretty sure you can do the whole thing without jacking a car - you just need to be a giant octopus

^best answer ever.

tooter · 12-04-2012, 06:16 PM

Quote:

Originally Posted by TOLMACH

^Tooter: I am pretty sure you can do the whole thing without jacking a car - you just need to be a giant octopus

I already did. Having the front of the car up helped make it easier... and I need all the help I can get.

12-02-2012, 06:04 PM	#3
1.5 Form>Function Drives: 07 Flint Sedan Join Date: Dec 2009 Location: Tampa Posts: 4,018	Tolmach yours also does not have the ceramic coating. I thought all DC headers for the yaris came coated. Is it a replica? Poor build quality, alteration of branding, and lack of ceramic coating... sounds like a Rep. __________________ Instagram: @southernstreets_phil Facebook.com/southernstreetsempire

12-02-2012, 11:00 PM	#5
Golddeenoh Takes corners too fast! View User's Garage Drives: Absolute Red 2009 Yaris HB Join Date: Apr 2012 Location: Columbia, SC Posts: 830	Tolmach, your pipes look kind of small as well but then again my Megan Racing header is 3mm larger diameter but i wouldn't think that i could tell the size difference in a picture with out side by side comparison. __________________ mods:15''Drag DR21 w/Nitto NeoGen 205/50R15, Tanabe DF210 lowering springs 1.6/1.8, TRD Rear Sway Bar, Tanabe Front Sway Bar, Micro Image Short Throw Shift Kit (both in and under), 8.64lbs flywheel, F1 Stage 4 Clutch, AEM Cold Air Intake (Red), Megan Racing Header, DC Sports Axle Back Exhaust, Micro Image Crank Pulley, NST lite Alternator Pulley, ARP Manifold Stud Kit,Tanabe Front Strut Tower Brace, ScanGuage II, Micro Image Silicone Radiator Hose Kit (Red), NRG Carbon Fiber Shift Knob (round), 2009-2011 Toyota Yaris Liftback Foglight kit, NRG Grounding Kit (Red), Hella Horns(Red),CF Hood

12-04-2012, 01:58 PM	#14
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	^ Good luck, and congrats on vacation time! __________________ 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.

12-02-2012, 12:07 AM	#1
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	the slight knock it causes in flow won't make much of a difference.

12-02-2012, 11:55 PM	#6
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	Can someone measure the I.D. on one of the primaries on this header? It looks similar to the OEM and somewhat smaller than the Weapon R header.

12-03-2012, 12:18 AM	#7
TOLMACH Drives: soarer Join Date: Feb 2011 Location: Beautiful British Columbia Posts: 954	^ Mine measure 31 mm = 1.22 inches

12-03-2012, 05:18 PM	#8
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	So perhaps the Weapon R is the closest port-matched of the two considering the amount of soot on the OEM. Anyone have an I.D. of an exhaust port?

12-03-2012, 05:49 PM	#9
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I measured 35mm for the port and 40mm for the gasket.

12-03-2012, 08:58 PM	#11
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I was once told by a GM engineer that the absolute best solution and absolute worse solution for exhaust is generally only a few % different. I've taken this advice to heart knowing the expected gains and losses can only be so much. I do expect gains but the dyno and racing will be the true test if it actually works, I have simulation numbers, but those aren't always accurate to the real world. If you want an easy/cheap solution ots parts work, but have the same design constraints production parts have, so you won't get the "best" solution. I can tell you this I noticed a significant loss of low-mid-range torque with the DC header while getting a size-able gain in topend torque. If you look at my dynosheet you can see that the DC produces a sizeable dip between 2700-3800 rpm, it feels really gutless out of slower corners but nice up top.

12-03-2012, 09:39 PM	#12
4/20 NEVER FORGET Drives: 2008 Yaris HB MT Join Date: Jan 2009 Location: Portland, OR Posts: 100	I have to defend the DC header, as I think it's been the single best bolt-on since I started messing with this car. First mod was a K&N typhoon intake, other than more engine noise, I didn't feel much change. Second mod was the DC header. I noticed no mid-range torque loss and a noticeable change to the way the top end acted. The engine breathed better in the top end, instead of running out of steam before redline like before. The power across the board seems more linear. Despite the cost I would recommend the header. Last engine mod I've done is a resonator-back obx exhaust. I didn't really notice any seat of the pants change from this. Now with these mods the car is easier to drive. It's surprising torquey in 5th gear, I don't have to downshift to 4th gear any more when going up hills on the highway, even with passengers. It still doesn't have the top end that my Honda cars had, which it probably never will. It pulls really well in the 3000-5500 range though for a 1.5L. Overall I'm happy with the mods, I/H/E are worth it in my opinion.

12-04-2012, 01:06 PM	#13
TOLMACH Drives: soarer Join Date: Feb 2011 Location: Beautiful British Columbia Posts: 954	Gone trying to install my header.. wish me luck )) (First day of annual vacation.. sooo nice)

12-04-2012, 04:16 PM	#15
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,962	Do show us pics of your project, and jack up the front of the car. It makes getting to the headpipe bolts sooo much easier from the bottom.