DC Sports Header install and evaluation - Toyota Yaris Forums

cali yaris · 11-21-2012, 01:36 PM

TRYaris is that your car in your avatar?

xnamerxx · 11-21-2012, 02:32 PM

Basically what Cali said.

There is a maximum of about 12" to work with and an ideal length of about 35" so most of the ots headers compensate by increasing the volume of tube which in essence give some of the same effect as increasing length but reduces scavenging at lower rpms. Now this motor is relatively small displacement with a good torque management system going to a larger diameter tube won't hurt you as bad as it would on a larger engine.

So not wanting to give up anywhere in the powerband while still gaining some up top is the reason I decided to design and build my own header.

As far as header type is concerned both a 4-2-1 and a 4-1 will accomplish the same goal but each design has its own advantages but both of them can produce near the same power and torque so there isn't a real advantage to choosing either one aside from packaging constraints, and a 4-1 is simply easier to package with the effecting lengths required.

TrYaris · 11-21-2012, 03:05 PM

Quote:

Originally Posted by cali yaris

TRYaris is that your car in your avatar?

No it's not :P would be nice but I don't have that much money !

11-21-2012, 01:36 PM	#1
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	TRYaris is that your car in your avatar? __________________ 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.

11-21-2012, 02:32 PM	#2
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	Basically what Cali said. There is a maximum of about 12" to work with and an ideal length of about 35" so most of the ots headers compensate by increasing the volume of tube which in essence give some of the same effect as increasing length but reduces scavenging at lower rpms. Now this motor is relatively small displacement with a good torque management system going to a larger diameter tube won't hurt you as bad as it would on a larger engine. So not wanting to give up anywhere in the powerband while still gaining some up top is the reason I decided to design and build my own header. As far as header type is concerned both a 4-2-1 and a 4-1 will accomplish the same goal but each design has its own advantages but both of them can produce near the same power and torque so there isn't a real advantage to choosing either one aside from packaging constraints, and a 4-1 is simply easier to package with the effecting lengths required.