Thanks TTP Engineering.

When I originally tested the gains of the SS Ebay style housing it was an uncoated version. The one that is on my car and the ones we sell are ceramic coated. I don't know how much if any HP it increases but the parts do have a cooler surface temp than a non-coated part and they look a hell of a lot nicer.

As TTP said, we only offer them ceramic coated and that is what I run everyday and what the baseline was done on the car with.

Thanks to those of you (most of you) that appreciate the time we took to do the testing.

 

Yes sir. All the bolt sand nuts went right on the O2 housing. There were tight fits on a couple of the bolts but NONE of the bolts bound up on the edges of the cast housing. The trick is to get the nut flush first and then insert the bolt (there is enough room, but it is tight). As for the welded O2 sensor port being welded, that is not news since that info has been posted previously in other topics.

 

Thanks David for the information, I appreciate it.

If someone else has done just a ported/coated o2 housing test against stock and has the results I would really appreciate someone posting the HP/Torque gains if any.

Thank you.

 

So, the Invidia housing put out slightly less than the Works 02 housing on Dave's dyno, right?

Where are all the MIT doctoral engineering candidates now? The ones who were waxing poetic about how the Works was inferior? Just thought I'd bring that back up.

 

I appreciate you taking the time to do this extensive testing. It looks from switching parts and nothing else that the parts where very even in HP production within the parameters that the testing was completed. However, I think MR. SNOW may have a somewhat valid point. When you modify something that effects the wastegates performance and/or ability to do its job, the boost controlling device MAY need to be adjusted to keep a level playing field. It appears that the bigger O2 housings are making nearly the same torque at a slightly lower boost pressure. Anytime you can do that, you are heading in the right way, I think we can all agree on that one. The bigger O2 housings also seem to be making nearly the same power at a lower peak and average boost pressure. You can see the average boost pressure in the dyno graph. It is at the far right column of numbers, I believe at the bottom.

I think most people would like to make the same power at lower boost pressure, and that looks to be what the bigger housings seem to produce. The decrease in boost is not huge, but 1 psi can be up to 10 hp and 10 ft lbs of torque. It would have been nice to see what the numbers would have been on the Invidia and Works housing had the Average boost pressures been equal to the Ebay housing. I have a hunch that the bigger housing would have made slightly more power, at least common sense would lend you to this conclusion.

My 2 pennies.

Brian

 

David B., thanks for the testing.

Too bad you or anyone else for that matter, been measuring Pr (backpreassure) when doing all this exhaust testing.

turbo speed would have been nice too.

maybe next time. i can try to hook you up with a turbo speed sensor.

 

Some of those people that are hating on Dave need to realize what kind of time he spent on doing all of this and appreciate what he did for us as a favor. Anyways Dave where could i buy the coated ebay housing you sell? Thanks

 

directly from his website .

 

haha yea i found that out i dont even know why i asked that!

 

I want to see a stock O2 housing verse EBAY O2 housing AT THE SAME BOOST LEVEL.

 

So go buy a $98,000 dyno and a O2 and let us know your results.

"Buschur Racing, dynotesting made to order"...

 

Too much fuss over too many small variables. It was close enough in my book, and like almost everyone else here I appreciate the testing. Although even without the test I still would have made the same decision as I did. I, like many other people, can't justify paying upwards of $400 for something I could get for almost a tenth the price, that would give me very similar results.

If the cheaper part does break, I can always get a new one, and I've still paid less than I would have going with the more expensive alternative. As for, "you pay for the build quality, I'll never have to replace, replacing is a waste of my time, etc." I say it wouldn't be a waste of time for me, because I actually enjoy wrenching on my car, and replacing a broken part would be no hassle to me at all. Unless of course we're talking pistons or something, but that's a whole other ball game. The build quality on the ebay piece looks just fine to me.

By the way, I think the O2 housing is the ONLY piece I would buy from ebay that isn't name brand.

Thanks again Dave for doing a test that no one else has, or probably would ever do!

 

thank you Dave for being a big contributor to this community. i've had the ebay o2 housing sitting in my garage for months now, i guess it's time throw it on the car.

 

Me too, of course, I drop the downpipe down, and then pull the hotside/O2 housing cluster off from the top to do the job, so I'm working with the piece off of the car.

(I didn't even pull the radiator the first time when I did the HS, but decided to this time since it was time to change the antifreeze anyway)

I understand the reason for the tight fit of the nut, because of the design of the piece, and didn't think twice about it. (that abandoned hole looks more like an EGT probe design idea to me though - what, .... did they hope no one would notice?)

My main concern would be getting "that one" nut loose after 100K without twisting the stud off, so I lathered on the anti-sieze.

I REALLY appreciate the tests David. I didn't find (or at least perceive) any of the bad fitment that you described however. I use an RMR DP, and as far I can tell I have no leaks, but I will be watching that closley.

Yes, there is the O2 cable issue - I'm trying to get an extension for that, mine's not stretched, but currently it's double wrapped with heat wrap from the sensor, up and over the Ex Man and valve cover - while I'm waiting for the extension - I do wish I'd seen that one coming.

If you were unable to get a nut or bolt back in, I wonder if that would affect any of the results? ( ... just pondering)

All in all, I always knock a bit off promised gains anyway (low expectations in general I guess :-D), ... so I figured If I got a 10 HP/Trq gain, I hit my mark, anything else would be gravy.

... next exhaust piece up for me: Busher P&C Stock Ex Mani :-) ... (trying to find a core right now as a matter of fact)

Thanks for ALL that BR contributes!

 

I have a core if you want it.