exhaust piping 2.5 inch or 3inch

yung · 07-31-2012, 04:12 PM

want to ask and body try be4 the exhaust piping 2.5 inch or 3 inch will be better ????

AvanT · 07-31-2012, 04:47 PM

Hi Yung,

Welcome to our new Airtrek Club.
Better in terms of what? it depends on what U want; silence, comfort, fuel economy, power, louder exhaust note, looks, etc.

I presume U intend to change the rear muffler as well, since U're asking this question...heheee.

U can check with bro kaninbu, he is looking for someone to trade/buy a stock muffler.
http://www.zerotohundred.com/newforu...o-muffler.html

stutzedward · 07-31-2012, 06:21 PM

If you're planning mild modification like exhaust, filter, intercooler and increased boost only, then 2.5" is the best. It still retains the low end torque as well as preserve city-drivability.

If you're going for more serious mod like 2.2L stroker, big turbo, high-cams, higher fuel inject etc etc to reach the 'above 350hp' mark.. then 3" will be good for you. Usually at this point, the trek is no longer auto.

yung · 07-31-2012, 10:44 PM

Quote:

Originally Posted by stutzedward

If you're planning mild modification like exhaust, filter, intercooler and increased boost only, then 2.5" is the best. It still retains the low end torque as well as preserve city-drivability.

If you're going for more serious mod like 2.2L stroker, big turbo, high-cams, higher fuel inject etc etc to reach the 'above 350hp' mark.. then 3" will be good for you. Usually at this point, the trek is no longer auto.

If I only change cam kelford , independent ignition coil means direct coil that each cylinder have 1 coil,Walbro, regulator lighten crank pulley , what is the diameter is suitable ???
Plz help I think this about 2 mont Ady ...hahaha

stutzedward · 08-01-2012, 07:08 AM

I guess it'll be good to retain at 2.5" based on your mods. What are the cam degrees? If you're going above 27x, does that means u will have plans for hardcore mods in future?

kaninbu · 08-01-2012, 01:20 PM

change higher cam need proper tuning.if not u lose alot low end torque.sluggish at low speed.
airtrek ori piping is 2.5inch.if u change ur cam to higher degree,u need better air flow/exhaust system.2.8 is a must.
msd ignition?confirm going 300whp lo.no point changing if mild mod.ori is very sufficient.
nonit stroker kit also nevermind.
wif ur current upgrade,u r goin 280whp boosting 1.5bar with additional higher cc injector,bigger turbo,fmic

yung · 08-01-2012, 04:34 PM

Quote:

Originally Posted by kaninbu

change higher cam need proper tuning.if not u lose alot low end torque.sluggish at low speed.
airtrek ori piping is 2.5inch.if u change ur cam to higher degree,u need better air flow/exhaust system.2.8 is a must.
msd ignition?confirm going 300whp lo.no point changing if mild mod.ori is very sufficient.
nonit stroker kit also nevermind.
wif ur current upgrade,u r goin 280whp boosting 1.5bar with additional higher cc injector,bigger turbo,fmic

thx for the info....i am using the brand car speed ignition coil have 4 coil ady.u can search at google also about the car speed brand...that mean 2.8 inch is the most suitbale on my mod???

kaninbu · 08-01-2012, 05:13 PM

if change additional higher cc injector,bigger turbo,fmic then u need 2.8inch..if not 2.5 for temp being.ur upgrade gantung 1/2 way.

yung · 08-02-2012, 03:36 AM

Quote:

Originally Posted by stutzedward

I guess it'll be good to retain at 2.5" based on your mods. What are the cam degrees? If you're going above 27x, does that means u will have plans for hardcore mods in future?

No ....I only will mod this only

stutzedward · 08-02-2012, 07:07 AM

2.5" is the one for you, that's what I wud recomend.

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