I wanted to know if any of you have an upgraded 02 housing. I saw them on lancer shpo and I want to know if they are really a good upgrade, and if they can throw a cel or require additional tuning.
Thanks for the help

 

you should look into an entire 3" o2 housing eliminating dp... i don't think anyone makes those... mostly because i don't think the stock turbo has a 3" outlet... which makes unecessary turbulance... next best thing is the o2 elim from rnr... or any other shop that fabs stuff...

 

They will maximimize your flow a little more. Tunning is key anytime you change a prt on your car.

 

Amen.

 

they will not maximize flow if the diameter of the turbo is not matched to the pipe/o2 housing eliminator size. the diameter of the exhaust housing exit is not 3" or anywhere close to that (for stock turbo). if you have the pipe bigger than the housing's exit then you get reduced exhuast gas exit velocity and turbulance which is bad... you want a gradual expansion with little turbulance that will disrupt overall flow.

the idea is that if the pipe opens up real suddenly just cuz you wanna slap on a 3" housing, the air will suddenly expand when coming out of the turbine... this rapid expansion slows the gases down, that's bad. you want high exit velocity to maximize flow. if you get an aftermarket turbo... by all means get a 3" housing/eliminator pipe to match. also for stock... the internal wasting requires extra tubing so you don't want that extra piping getting in the way and causing expansions either.

you can't tune out more exit velocity, you'll just be working with less efficiency which in the end will get you less power than more efficiency.

 

I have to disagree with that, while flow velocity of exhaust gases is important in N/A vehicles. I don't believe that is the case with Turbo charged vehicles. In N/A cars the gas velocity staying high, creates a sort of vacuum to suck out more gas from the engine. But on turbo charge vehicles this doesn't matter, the turbo could be shooting all the exhaust gases to air, for all that matters and you would notice a increase in performance. Which means the less back pressure with a turbo charged vehicle is more important .... not exhaust velocity. Infact a turbo directly shooting exhaust into atmosphere will perform better than that shoot its exhaust into a pipe that leads to a muffler. No offense but with your theory by the time the exhaust gases reach the muffler all the way from the turbo wouldn't the temp of the gases be a few 100 degrees cooler? wouldn't that in turn mean the volume of the gases would change or reduce? and wouldn't that mean to keep the same high velocity of the exhaust gases the diameter of the piping would have to gradually reduce? ......

 

shooting directly into the atmosphere is not the same as shooting it into a bigger is better pipe... becuase i mentioned turbulence... that's what messes up the overall flow, with the addition of sudden expansions causing reduced velocities.

the losses you describe are unavoidable... what is avoidable however is unneeded turbulances caused by throwing on the biggest pipe you can. but then again this is all theories and stuff... if someone wants to try both... hey why not... but i think someone already has... the works site describes their downpipe size and justifies its diameter with the fact that they tested this type of thing. although they don't make 02 housing eliminators because they're more of a stockish bolt-onish not raw power kinda tuner.