after gutting my stock uppipe i figured i would post a link that helped a lot. the directions are pretty self explainitory..thanks to gotsol for the additional info and of course the others who showed up to help(you know who you are:bigthumb: )..if anyone has questions let me know http://webpages.charter.net/baraboo_halls/auto/wrx/up/uppipe_fix.html
looks like its stock and looks like a CAT for any visual inspection... however i dunno who's gonna visually inspect the uppipe
from my experience so far yes.i would definately recommend it.not just because of saving on cost but if u think about it, you cant go with a bigger pipe anyway before the turbo and if you do you will just be creating turbulance before the turbo which will result in lack of performance. .the stock diameter of the uppipe is perfect and bolt up to any ihi turbo or td04 will be exact..again this is just my opinion but i am very happy so far..boost response is much better..sounds awesome..i dont know what else to say! wish i would have done this to begin with.
I just had my up pipe visualy inspected when I had to get my inspection done in North Carolina. Thats about all they do when they test for emisions
I have the PDE up and I looks like it is a larger diameter than stock. Is this true and if so why do they say it is so good
my explanation comes from a physics perspective: if the flow rate through 2 pipes (of different diameter) is constant, a thinner pipe will output fluid at a higher velocity but at a lower pressure compared to a thicker pipe... higher velocity output should cause ur turbo to spin faster thus helping it spool quicker... however, a thinner pipe being more restrictive will generate more back pressure thus making the engine work harder to output waste gases at a given flow rate compared to a wider pipe for the same flow rate... so u have a trade off between the engine breathing easier and the turbo spooling quicker... dunno which is necessarily better this is an extension to what i studied a while back... i may be wrong... anyone wanna correct me?
Dude, that just didn't sound right. Milo, I think either approach to the extreme is bad; you don't want a 1/2" uppipe because it'll choke the engine, and you don't want a 6" one because it'll kill the velocity. I'd guess you would want it to match the turbo compressor inlet relatively close. Turbo spinning quicker/faster is probably the more important factor as, depending on cam overlap, more intake pressure will help push the exhaust out as well.... but I don't know enough about the WRX engine to really comment on that! I think APS tapers their uppipe to increase velocity as it moves to the turbo without affecting flow as much as it would if the pipe was narrow throughout.
i plan on gutting a purchased UP from a stock 05 wrx and possibly installing it on the 21st, you wanna help weapon?
holy crap, thats nuts, two up pipes and springs and steering rack bushings and headlights and a big ass cookout. this will be the greatest day of my life!
no seriously, i want to gut an up, im hesitant to do it onthe install dayso i was thinking of buying another one and gutting it and swapping it on the install day??? what do you guys think?
im sa retard, you all already know that, but i assumed that you would have to cut the Up piper open with a plasma cutter and then pull everything outand then re-weld it. obviously this is not the case and i feel stupid for not reading the instructions. it would be smart to get another one to do before the install day though.