DC Sports Header install and evaluation - Toyota Yaris Forums

xnamerxx · 12-03-2012, 04:49 PM

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

NJ Drive · 12-03-2012, 05:39 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, 07:58 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.

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12-03-2012, 04:49 PM	#1
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, 07:58 PM	#3
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.