Should I go with 2.25" or 2.5" exhaust tomorrow? - Toyota Yaris Forums

PETERPOOP · 03-17-2009, 11:50 PM

.

blacksandiegovitz · 03-17-2009, 11:54 PM

2.25" Ftw ! I had 2.5" on my 2.2 accord with every bolt-on back in the day and the low-end response was death ! On the 1.5 w/ the blitz S/c I think 2.25" stright through with a magnaflow on the end will be killer , and just the right amount of back-pressure for low-end tq .

White Yaris · 03-18-2009, 12:21 AM

2.25 all the way. My custom set up is 2.25 in/out resonator, 2.25 out/ 3in tip muffler from vibrant. Cat-back tho.

largeorangefont · 03-18-2009, 02:46 AM

2.25 like I told you last month.

yarisugi · 03-18-2009, 02:57 AM

I think RAD has plenty of 2.50" tubing in stock so they suggested that. lol.
2.25"

... that means soon you'll be sellin' that "old" one, huh?

dallas · 03-18-2009, 03:48 AM

The secret to the most h.p and torque is to have no back pressure but to maintain your exhaust gas velocity. If you go too big in pipe diameter you will loose velocity, I would go no bigger than 2.25 Unless your turbo charged or supercharged then you can go bigger. On this engine with basic bolt on's even 2.25 will not work well until the higher rpm range.

red_rims · 03-18-2009, 03:55 AM

2.25 bro. hey does anyone know how much it will affect gas mileage doing all that?

PETERPOOP · 03-18-2009, 04:00 AM

I'm hoping not THAT much, because I've already lost a lot with the S/C. And I will probably lose more with the 1zz throttle body.

djgab101 · 03-18-2009, 04:16 AM

Quote:

Originally Posted by PETERPOOP

I am supercharged; but this supercharger doesn't put down the kind of power that recquires 2.5" piping.

Ok then, 2.25" it is!

u said after exchaust ur going on dyno i wnat dyno sheets plz!!! plzzz

Tamago · 03-18-2009, 09:18 AM

2.5, so later when you go turbo you don't have to re-do your exhaust..

ddongbap · 03-18-2009, 09:45 AM

Quote:

Originally Posted by Tamago

2.5, so later when you go turbo you don't have to re-do your exhaust..

I highly doubt the 1NZ can put down enough power to require 2.5 work done. In ANY form.

Tamago · 03-18-2009, 10:01 AM

Quote:

Originally Posted by ddongbap

I highly doubt the 1NZ can put down enough power to require 2.5 work done. In ANY form.

mine enjoys it

cali yaris · 03-18-2009, 01:57 PM

Quote:

I highly doubt the 1NZ can put down enough power to require 2.5 work done. In ANY form.

Really? I thought you knew about my car.

Split · 03-18-2009, 03:48 PM

i dont think 2.5 will hurt performance, but i highly doubt you'd gain anything from it. 2.25" should be a bit quieter as an added benefit if that's what you prefer.

ddongbap · 03-18-2009, 04:07 PM

Quote:

Originally Posted by Tamago

mine enjoys it

But does it require it?

nisyota · 03-19-2009, 04:50 AM

with a supercharger... 2.25" pipes... isn't 2.5 normally used for 500hp or more? How much HP are you putting out?

2.25 should be best for low end torque, but the 2.5 will only play at the top end...

ddongbap · 03-19-2009, 05:28 AM

Quote:

Originally Posted by cali yaris

Really? I thought you knew about my car.

Well, you don't count. You don't REALLY have a 1nz. haha.

The Spectacle · 03-20-2009, 01:24 AM

2.25 was a good call. Your muffler choice however, was not.

03-17-2009, 11:50 PM	#1
PETERPOOP View User's Garage Drives: 08 white liftback Join Date: Oct 2008 Location: Oahu Posts: 3,674	. . Last edited by PETERPOOP; 05-17-2009 at 10:27 PM.

03-17-2009, 11:54 PM	#2
blacksandiegovitz Your mom goes to college View User's Garage Drives: 08 Vitz Join Date: Oct 2008 Location: Just chillin' out brah ! Posts: 1,434	2.25" Ftw ! I had 2.5" on my 2.2 accord with every bolt-on back in the day and the low-end response was death ! On the 1.5 w/ the blitz S/c I think 2.25" stright through with a magnaflow on the end will be killer , and just the right amount of back-pressure for low-end tq . __________________ Garm is permanently high because he is the king of smokin' deals!

03-18-2009, 12:21 AM	#3
White Yaris Broke Tuner View User's Garage Drives: White Yaris Join Date: Oct 2008 Location: Warm Orange County Posts: 146	2.25 all the way. My custom set up is 2.25 in/out resonator, 2.25 out/ 3in tip muffler from vibrant. Cat-back tho. __________________ EVERYTHING YOU KNOW IS WRONG

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03-18-2009, 02:46 AM	#4
largeorangefont Break'em off some. View User's Garage Drives: 07 Yaris LB, 04 Cobra Join Date: Jan 2007 Location: So Cal, OC Posts: 854	2.25 like I told you last month.

03-18-2009, 02:57 AM	#5
yarisugi やりすぎだ～ View User's Garage Drives: Me: Nuts: Join Date: Nov 2008 Location: ハワイ Posts: 2,041	I think RAD has plenty of 2.50" tubing in stock so they suggested that. lol. 2.25" ... that means soon you'll be sellin' that "old" one, huh?

03-18-2009, 03:48 AM	#6
dallas Drives: Yaris Hatch /Landrover D2 Join Date: Jun 2007 Location: Canada Posts: 242	The secret to the most h.p and torque is to have no back pressure but to maintain your exhaust gas velocity. If you go too big in pipe diameter you will loose velocity, I would go no bigger than 2.25 Unless your turbo charged or supercharged then you can go bigger. On this engine with basic bolt on's even 2.25 will not work well until the higher rpm range.

03-18-2009, 03:55 AM	#7
red_rims Black Yaris View User's Garage Drives: Black Yaris Join Date: Mar 2009 Location: CA Posts: 29	2.25 bro. hey does anyone know how much it will affect gas mileage doing all that?

03-18-2009, 04:00 AM	#8
PETERPOOP View User's Garage Drives: 08 white liftback Join Date: Oct 2008 Location: Oahu Posts: 3,674	I'm hoping not THAT much, because I've already lost a lot with the S/C. And I will probably lose more with the 1zz throttle body.

03-18-2009, 03:48 PM	#14
Split Drives: 2008 Yaris Sedan Join Date: Oct 2008 Location: Edmonton Posts: 393	i dont think 2.5 will hurt performance, but i highly doubt you'd gain anything from it. 2.25" should be a bit quieter as an added benefit if that's what you prefer.

03-19-2009, 04:50 AM	#16
nisyota Drives: 2007 Toyota Yaris Sedan Join Date: Feb 2009 Location: Orlando, USA Posts: 73	with a supercharger... 2.25" pipes... isn't 2.5 normally used for 500hp or more? How much HP are you putting out? 2.25 should be best for low end torque, but the 2.5 will only play at the top end...

03-20-2009, 01:24 AM	#18
The Spectacle View User's Garage Drives: 08 BSP LB Join Date: Oct 2008 Location: Tampa, FL Posts: 218	2.25 was a good call. Your muffler choice however, was not.