What you think - Toyota Yaris Forums

Yoda · 02-01-2009, 03:32 PM

planning on gettint the dc header and the underdrive pulley set think it will net me some good whp numbers? i already have trd exhaust and afe intake but dont really feel a diff

any other performance mods ideas are welcomed

Black Yaris · 02-01-2009, 03:38 PM

pulley set is very noticeable when installed

1NZYaris1 · 02-01-2009, 03:53 PM

Quote:

Originally Posted by Black Yaris

pulley set is very noticeable when installed

+1 , the pullie set is a must do

and Black Yaris your aviator rocks

Yoda · 02-01-2009, 04:42 PM

yea pulleys are must not sure about the header... lots of info on the subject was lost during the hack cant seem to locate it now :(

Tamago · 02-01-2009, 05:12 PM

Quote:

Originally Posted by Yoda

yea pulleys are must not sure about the header... lots of info on the subject was lost during the hack cant seem to locate it now :(

it's been posted in the last couple days. people have claimed +3whp with pullies. so, about $100/hp

Yoda · 02-01-2009, 05:22 PM

hhmm ok so no header then. i cant remember once where some1 showed a dyno of header gains(excluding Richards). So is the header just a placebo for our cars?

Tamago · 02-01-2009, 09:54 PM

Quote:

Originally Posted by Yoda

hhmm ok so no header then. i cant remember once where some1 showed a dyno of header gains(excluding Richards). So is the header just a placebo for our cars?

everything but forced induction and a tune is a placebo on the 1.5L 1NZFE

Black Yaris · 02-01-2009, 09:57 PM

Quote:

Originally Posted by Tamago

everything but forced induction and a tune is a placebo on the 1.5L 1NZFE

says the man with a Turbo...

but a lot of little mods that add a tiny bit of HP all do add up.... don't add up to much, but it does add up

Yoda · 02-01-2009, 10:06 PM

so dc header yes...no?

Black Yaris · 02-01-2009, 10:08 PM

tell you the truth, I do not think anyone has noticed anything from installing a header... I sure did not

TOUGEghost · 02-01-2009, 11:31 PM

I can't comment on the header by itself since I installed my header/cai/exhaust all at the same time, but there is a definite improvement on the top end. 5000 to redline feels much better. It does feel about the same as stock until you get past 3500rpm.

Return of the Yarii · 02-02-2009, 08:05 AM

Quote:

but there is a definite improvement on the top end. 5000 to redline feels much better. It does feel about the same as stock until you get past 3500rpm.

I had a DC Header and TRD exhaust installed at different times, header (at least the DC, cant speak on the others Megan, etc) had noticable increase at 3500 rpm-redline. Header has been since sold to Loren who I believe has noticed similiar gains as well. Maybe he can comment and confirm.

yarstar · 02-02-2009, 08:31 AM

I'm not sure why others didn't see this, but I saw a BIG difference when I put on my Weapons R 4-2-1 header. It went like this:

TRD catback = little change

AEM CAI = a little change

NST Pulley Set = a little more change

Weapons R Header = Big change!

This was just my experience.

Yoda · 02-02-2009, 09:02 AM

how hard was the install. I heard the crank pulley is a pain to get off and some guy snapped his header after a couple moths due to a bad install....he forget to install the spring nut thingy..

Return of the Yarii · 02-02-2009, 09:07 AM

Header is pretty straightforward, 3 bolt and 2 nuts + the 2 bolts/springs connecting stock manifold to the headpipe. There is also a lower bracket w/1 bolt and a small bracket holding A/F sensor wire. The A/F Sensor will need to be removed from the stock exhaust manifold and installed in the new header. Just a heads up many of us had the "crossthreaded" A/F Sensor and had to buy a new one because the stock one just cannot be removed.

Yoda · 02-02-2009, 09:42 AM

so i goto by more stuff where do i get it? part number?

Return of the Yarii · 02-02-2009, 10:09 AM

I bought header from Dan over @ We Sell Car Parts for $265. DC part number THC4407

I also purchased a brand new A/F Sensor from Ken over at Sparks for 170.25, Toyota part # 8946752020.

Hope this answers your question

Yoda · 02-02-2009, 10:12 AM

yea thanks. why they make it crossthreaded? i wonder if it shows in the manual how to get it out. Hard to think they made it so it could not be removed

02-01-2009, 03:32 PM	#1
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	What you think planning on gettint the dc header and the underdrive pulley set think it will net me some good whp numbers? i already have trd exhaust and afe intake but dont really feel a diff any other performance mods ideas are welcomed

02-01-2009, 03:38 PM	#2
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	pulley set is very noticeable when installed __________________

02-01-2009, 10:08 PM	#10
Black Yaris der Zeck View User's Garage Drives: '05 Audi A4 1.8t quattro Join Date: Sep 2006 Location: Toledo, OH Posts: 5,231	tell you the truth, I do not think anyone has noticed anything from installing a header... I sure did not __________________

02-02-2009, 08:31 AM	#13
yarstar View User's Garage Drives: 2008 Absolute Red HB Join Date: Oct 2008 Location: Georgia Posts: 264	I'm not sure why others didn't see this, but I saw a BIG difference when I put on my Weapons R 4-2-1 header. It went like this: TRD catback = little change AEM CAI = a little change NST Pulley Set = a little more change Weapons R Header = Big change! This was just my experience. __________________ AEM CAI, NST Pulleys/SSK, WR 4-2-1 Header, TRD axelback, R1 Concept Rotors, TRD Sway Bar, Nitto Rear Strut Bar, Cusco GT-Zero Coilovers, 1ZZ-FE 1.8L TB

02-01-2009, 04:42 PM	#4
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	yea pulleys are must not sure about the header... lots of info on the subject was lost during the hack cant seem to locate it now :(

02-01-2009, 05:22 PM	#6
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	hhmm ok so no header then. i cant remember once where some1 showed a dyno of header gains(excluding Richards). So is the header just a placebo for our cars?

02-01-2009, 10:06 PM	#9
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	so dc header yes...no?

02-01-2009, 11:31 PM	#11
TOUGEghost Mr. Clean View User's Garage Drives: 2009 Yaris S 3-Door Join Date: Nov 2008 Location: Kauai Posts: 268	I can't comment on the header by itself since I installed my header/cai/exhaust all at the same time, but there is a definite improvement on the top end. 5000 to redline feels much better. It does feel about the same as stock until you get past 3500rpm.

02-02-2009, 09:02 AM	#14
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	how hard was the install. I heard the crank pulley is a pain to get off and some guy snapped his header after a couple moths due to a bad install....he forget to install the spring nut thingy..

02-02-2009, 09:07 AM	#15
Return of the Yarii Drives: 2007 Sedan S Join Date: Oct 2008 Location: Naperville, IL Posts: 53	Header is pretty straightforward, 3 bolt and 2 nuts + the 2 bolts/springs connecting stock manifold to the headpipe. There is also a lower bracket w/1 bolt and a small bracket holding A/F sensor wire. The A/F Sensor will need to be removed from the stock exhaust manifold and installed in the new header. Just a heads up many of us had the "crossthreaded" A/F Sensor and had to buy a new one because the stock one just cannot be removed.

02-02-2009, 09:42 AM	#16
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	so i goto by more stuff where do i get it? part number?

02-02-2009, 10:09 AM	#17
Return of the Yarii Drives: 2007 Sedan S Join Date: Oct 2008 Location: Naperville, IL Posts: 53	I bought header from Dan over @ We Sell Car Parts for $265. DC part number THC4407 I also purchased a brand new A/F Sensor from Ken over at Sparks for 170.25, Toyota part # 8946752020. Hope this answers your question

02-02-2009, 10:12 AM	#18
Yoda Drives: 2008 Black Sedan Join Date: Oct 2008 Location: FL Posts: 966	yea thanks. why they make it crossthreaded? i wonder if it shows in the manual how to get it out. Hard to think they made it so it could not be removed