I called these guys and asked about their full 3 inch O2 housing. They were very cool and I ordered one. This is the nicest peice I have ever seen, and I cant wait to get it. Let me know what u guys think
http://shearermotorsport.com/

Very nice but damn .. the price is incredible for one of those...

i really like this one

it sounds like you'll need a custom DP. I don't know if I'd want to try to retrofit a hahn Jr. or equivalent for this.

Ben

It is a beauty isnt it? I figure this will be enough to flow any freakin turbo I put on the colt. They also have pimp 2.5inch ones I almost bought.
bjgarvin: you dont really need a custom DP, it just doesnt bolt on in the stock location, so you need to put a 3 inch slip fitting on the DP so it will bolt up, much better than those 2.5 to 3 inch DP's advertised as full 3 inchers, like the Apexi.
Oh, and u guys would like the intercooler kit they have for First Gens. I am gonna try to get the core to work on my car, the core is 24 wide and somthing like 31 tank to tank, 8in tall, and 3.5in thick. They sell it for 650$ installed with polished stainless pipes, for that price I wish I had a DSM!

I consider this O2 housing to be rather impressive also if you don't want to pay quite the price of the Shearer Motorsport model: the QPR

that is cute, but it is not full 3ich , matter of fact, does anyone elso even make a full 3 incher?

You really don't want 3" right away..

You want to match the turbine outlet then expand to 3" at a 7 degree included angle.

My DP is 2.75 at the O2 mount. I'm matching my pte 56's turbine outlet and expanding to 2.75. A little ways past the flange the downpipe reaches 3". All transitions are tapers not steps.

I don't know if I like the bends on the wastegate pipe. They look a little sharper than some. Also the WG port on the housing is'nt round. So the pipe should'nt be round at the mount nor should the hole in the flange. Think port matching.

I think you could buy a used wirefeed mig and the bare metal and still beat that price.

These are some kick ass o2 housings. You do not need a custom downpipe either. Just cut the 2.5" flange off the old one and you're set.
Thumbs up from a happy customer.

those are really expensive.

I have one on order from http://paradigmracing.biz/

$165...

a 3" 02 housing will spool quicker flow more and offer lower EGT's.

do it once do it right

that housing is 165$ because it looks liek some back yard mechanic thew it together with his fisher price mig welder and then sprayed it with a coat of .99$ paint. IT will work, but you get what you pay for.

According to Garret. Expand from turbine outlet diameter to exhaust size at a 7 degree included angle. Jumping right to 3" causes turbulance.

Also none of those housings has the right shape of wastegate tube. It should match the cavity in the housing the wastegate sits in. Larger than that pipe on those housings and kinda oval with one flat side.

Please re-write your first pharagraph so it can be understood by readers, I dont think anyone could understand that chicken scratch.

As for the wastegate, no it is not the same shape as the outlet fo the wastegate, but...
1)A flange cut to match the wastegate outlet would be to large to accept a 3 inch pipe, so this is why it is designed as such
2) A wastegate is designed not to make power, but to control boost, so as long as I dont boost creep, it is doing it's job. Boost creep sould be a problem with a full from the turbo 3 ich and no cat right? We'll see how inefective it is.


And for the turbulance comment, tell that to the people who have swiched to this unit form a ported Evo III O2 elbo and full 2.5 inch peices, and gained .2-.3 in the 1/4 mile and a couple miles an hour

I concur with coltboostin. There are huge gains to be made in the 02 housing dept and a 3" 02 housing will definitely make more power than a 2.5". Well, this is considering you have a decent sized turbo, dont see a place for this on a 14b car.

Just for reference, Curt Brown was using a 3" o2 housing on his Red running well into the 9's, proof that a 3" 02 housing is not a bad thing.

3 inch is better, true, but Garret engineers do state the 7* spec, and they have done the testing to back it up. However, on DSM's we don't have the room to be that picky.

Originally posted by coltboostin
Please re-write your first pharagraph so it can be understood by readers, I dont think anyone could understand that chicken scratch.

Click to expand...

Re Write.

That o2 housing is a POS. This completes the new paragraph :laugh:

Originally posted by coltboostin

As for the wastegate, no it is not the same shape as the outlet fo the wastegate, but...
1)A flange cut to match the wastegate outlet would be to large to accept a 3 inch pipe, so this is why it is designed as such
2) A wastegate is designed not to make power, but to control boost, so as long as I dont boost creep, it is doing it's job. Boost creep could be a problem with a full from the turbo 3 ich and no cat right? We'll see how inefective it is.


And for the turbulance comment, tell that to the people who have swiched to this unit form a ported Evo III O2 elbo and full 2.5 inch peices, and gained .2-.3 in the 1/4 mile and a couple miles an hour

Click to expand...

1. The factory cast part sucks EVO or not. So it is'nt hard to make an O2 housing that makes more power even if it looks like sh*t.

2. The wastegate IS A COMPONENT THAT MATTERS IN POWER OUTPUT. A wastegate that can flow more decreases exhaust manifold pressure more than one that is more restrictive. Since the flapper is still in the exhaust stream on an internal gate when open a LARGE wastegate outlet tube is of utmost importance. I'm serious about this being a big gain..

I WILL MAKE THIS SIMPLE

Why do FP30's with external tial WG make a bit more power than internally gated turbos with the same wheels.... Hmmm could'nt be due to better wastegate flow and turbine exducer side flow increases due to using an outlet pipe that matches the wheel then expands to exhaust system diameter.


3. I'm not talking about a 3" pipe right on the manifold so there would be room for a bigger WG tube. Match the turbine wheel outlet diameter and the WG port shape on the turbine housing. Some of the biggest turbine wheel exducers around are about 2.75 inches. Most larger turbos are around 2.5" http://www.precisionte.com/sportcompact.php

"Why do FP30's with external tial WG make a bit more power than internally gated turbos with the same wheels.... "

A. I have seen no proof thats true.

B. Housing design is radically important and there are no FP turbine sides with a internal gate, so the whole conversation is completely moot.

Fine..

Why does having an O2 mounted external gate produce more power than the same turbo with an internal gate.

Yes FP has a really good turbine housing casting so that is part of it too.

If anyone gives a crap or not it is true that 99.99% of tubular o2 housings are'nt being built to what ideal specifications are.

If you have a externally dumped external OR internal you are going to have less turbulence and lower exhaust back pressure. The valve location, whther in or out of the turbine, is irrelevant.

If you have a external dumping into the exhaust, it will produce the same poweran an internal.

DSM's don't have ROOM for a "proper" O2 housing.

As i was saying........Wastegate DOES NOT MAKE POWER.
SO you seriously think this O2 housing is crappy? Wow, Id love to see what you are running!

I dont want to hijack but just bought an RNR 3inch O2 elim back exhaust. I put it on and and t fits great. My only problem is I get some creep with it. I am still on the 14b for now until I get injectors then I can safely put my 20G on. I am wondering if it is just something I will have to deal with for now or if I can fix it. I dont want to pull the turbo becasue I will be doing that to put the 20G on and dont want to do it twice. I am guessing that the flapper and hole are the big restriction now as opposed to the exhaust and that why it creeps. Any suggestions would be great. Here is a pic of my O2



Michael

Originally posted by coltboostin
As i was saying........Wastegate DOES NOT MAKE POWER.
SO you seriously think this O2 housing is crappy? Wow, Id love to see what you are running!

Click to expand...

Actually it looks ok... I just think there are better ways to do it.


Can you MIG and TIG weld?


I can

Mild steel, Stainless, Aluminum... No problem.


I just don't understand why it is so damn hard for you to grasp that WG flow increases can make power.

It's a basic concept that decreasing restriction of exhaust flow creates gains. So If you increase flow tru the wastegate you can increase power.

It's like saying catbacks don't make power they just lower backpressure.

A wastegate that can flow more exhaust lowers backpressure between the turbine and the head better. Less backpressure = more power. A larger gate or a better flowing one can bypass more exhaust around the turbine. So if you are at full boost and you have alot more exhaust gas flow than what is needed to maintain that boost level you can run a lower exhaust manifold pressure.

Originally posted by Skeletor
I concur with coltboostin. There are huge gains to be made in the 02 housing dept and a 3" 02 housing will definitely make more power than a 2.5". Well, this is considering you have a decent sized turbo, dont see a place for this on a 14b car.

Just for reference, Curt Brown was using a 3" o2 housing on his Red running well into the 9's, proof that a 3" 02 housing is not a bad thing.

Click to expand...

Forced Performance has also put down 550whp on a 2.5" housing as well. Robert says you dont need to upgrade to a 3" housing until your turbine wheel measures over 2.5". Take it for what it's worth.

Originally posted by NOSLO2PT0
Forced Performance has also put down 550whp on a 2.5" housing as well.

Click to expand...

That was also on a 2.3L stroker motor