aporambo

iTrader: (1)

Depends on your age I think. lol

I had one on a 97 Eagle Talon and it was the worst mod I ever put on that car. Immediate regret followed.

Can you ride in someone's car that already has one installed?

blackenedwings

Right, the more you run, the less the restriction the housing has matters because the less comes out. In the case of the MAP o2 eliminator it necks down very steeply causing a lot of backpressure and limits the flow it can dump out. The more boost you run, the less flow it needs. Some of the regular o2 housings like the Megan or Invida are actually pretty good from a flow perspective because they are large and don't neck down.

From a backpressure/flow perspective I would rate a true open wastegate best with a properly designed dump housing next, then a properly designed closed housing. Anything that has excessive reductions or bends will hurt power production and spool. One of the reasons I dislike stock frame o2 dumps which curl upwards to exit through the hood. That 90 degree U-bend is definitely not ideal for power production.

sinople1

iTrader: (12)

I do agree that the u bend on mine probably isnt ideal but im making very good power for my setup its a compeltely stock never opened motor with a bbk full ported on e75 with bolt ons it made 484awhp tuned by strictly modified going back to see what it puts down on true e85 in the next few weeks

spiXel

i have a QTP and wouldn't buy one again. not worth it IMO

Mistaken

iTrader: (20)

I dont have to... Aaron over at English has done it for me.

sr20det91

iTrader: (59)

The simple fact is this: as stated before.. Your gains will be much more pronounced the bigger the turbo and higher the boost you run. With a stock turbo an open o2 dump is little more than a noise maker. It is possible you may have slightly better spool, but thats about it...

Mistaken

iTrader: (20)

When I added mine with a stock turbo, I gained 15whp and my buddy who had the same mods ended up 20whp HIGHER than what I came in at. Same tuner, same day. So it might be more the car than simply saying with a stock turbo it wont make much difference.

iceburg470

iTrader: (5)

Unfortunately I cannot. Where I live in central PA, Williamsport, there are a few evo's here but all are tame. Tim here, Lancerboy89, has his built up pretty well from CBRD but it is not dumped. He was saying CBRD doesn't recommend them either.

Noise doesn't bother me all that much. I just wanted to know if I was leaving 5-20+ hp or torque on the table by sticking with a housing unit rather than a dump.

From what I've seen, toxic fab, jmf, map or a custom made model are the best dumps.
I haven't seen any hard evidence for housings other than people saying Megan's is best bang for the buck. Invidia flows well but no gains really? And toxic fab, well premium quality for the best of the best... but also premium price. But who buys an evo and expects or wants to go cheap?!

xXevo8RavenXx

iTrader: (3)

i prefer open dump. not just because the sound but i just like everything about it..

fightex

iTrader: (15)

on the base map with 0 wgdc I was able to do 22.5psi from ~3800rpm all the way to redline. No creep with mine whatsoever. Sucks that you had bad luck with yours. Did you ever talk to MAP about it?

FJF

iTrader: (18)

Yes, Buschur does. They tested a number of O2 housings, rejecting some due to poor performance, and pointed to one as an improvement. The test registered a ~15whp gain. 15whp sounds good, right? Well, it did to almost everyone who bought an Evo - most were stock-ish then - and bolted on the piece. Then, the forum threads started, all citing gains and many 02 housings were sold as a result of the mass of anecdotal recommendations. What's the problem, then? BR's test also showed a change the boost profile that was mostly responsible for the gain.

[OT] FWIW, I never installed an o2 housing on my car, along with any other useless parts for non-heavily modified motors like LICPs, etc. No real point to it. Then, there's a lost of factory reliability, fit, install pressures ...and for what? To tell folks on a forum that you bought a part? To park the +100K mile 6-owner beat-to-sh/t atrocity at some meet and stand next to it hoping for accolades from other losers? It must be a great life. [/OT]

bjmauck

iTrader: (3)

I personally don't like the open dump. Too loud.

Danner

iTrader: (1)

Thank you!

Its an attention getter' more than anything. Just like people stated "bus stops, tunnels, scaring people". Really smart to have even more potential for tickets too. Same people run overly rich tunes so that more flames come out of their exhaust.

to each his own, these are only opinions.

lil_town

very interesting thread here

iceburg470

iTrader: (5)

I ended up getting the ported o2 housing from Buschur (ported Megan's).

No dyno numbers as I'm still not finished with putting the car all together. So at this time, I cannot report any results quite yet.