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 ???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.
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???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
No ....I only will mod this onlyI 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?