I can't find downpipe angled for an evo o2 housing

[housegsx]

I received mine the other day. I got the short DP evo o2 flanged and the magnaflow cat. The only thing I need to get running is my turbo. Here are some pics. It's a little better than the stock one.

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[daren_p]

Looks like a nice little pile you've got going there

 

[daren_p]

Recieved a reply from Mike W. over at RRE. He said it was cost that made RRE change to aluminized piping for the second half of the DP (that is, to keep costs down, presumably both for the company and for the consumer). He also said that if the consumer really wanted an all stainless steel downpipe, then the consumer should look to add $60 and 3-to-4 additional days for RRE to make it. I suspect you would have to send a special email or specifically state this change on the "Order Form".

Does that change mean origionally it was all SS & then they changed the design for cost or they changed to aluminized for the second half with the origional design?

Im still thinking mines all SS, as I just had to go out & check & there's still not a spot of rust anywhere on it after 4 years of use from me & then however old it was before I bought it. Even my Apexi system that was bought new at the same time, has started to get small surface rust spots on some of the welds. If it is Aluminized it seems to be pretty heavy duty.

 

[jim97gst]

Im still thinking mines all SS

Test it with a magnet. A magnet won't be attracted to SS.

 

[DSMunknown]

Does that change mean origionally it was all SS & then they changed the design for cost or they changed to aluminized for the second half with the origional design?

Im still thinking mines all SS, as I just had to go out & check & there's still not a spot of rust anywhere on it after 4 years of use from me & then however old it was before I bought it. Even my Apexi system that was bought new at the same time, has started to get small surface rust spots on some of the welds. If it is Aluminized it seems to be pretty heavy duty.

I recieved a response the other day, but forgot to post it up.


This was the email message I sent:

Just a follow-up question - Does this mean that RRE used to make this DP (and all other DPs) with fully stainless steel? Is this change fairly recent (over the past few years) because of the rising cost of materials/labor/etc? Or has RRE always made their DPs like this?

And this was Mike's response:

We have always made DPs like that unless someone was scared of the aluminized piece of pipe for some reason and was willing to pay extra for all SS piping. Sometimes people ask for all SS piping and we make them that way. That way the 95% of the people that dont care to pay extra for all SS piping dont have to.

 

[daren_p]

I recieved a response the other day, but forgot to post it up.


This was the email message I sent:









And this was Mike's response:

Thanks for the follow up. Now its got me curious so I'll have to do the magnet test when I get a chance. If it is aluminized after the flex, I'll be surprised because of the condition its still in.

 

[housegsx]

I'm going to get some pictures of mine installed as soon as I get the turbo. Everyone's out of evo3 16gs.

Daren P, does yours have the spray paint stuff on it after the flex section and at the welds?

I'm guessing it's aluminized and then they weld it and they they coat the welds to protect them. Does anyone know if the RRE piping is aluminized before or after flanges and hangers are welded on? I'm sure RRE probably gets the piping in aluminized already.

 

[90blacktsiawd]

Everyone's out of evo3 16gs.

You try JNZ Tuning?

 

[housegsx]

You try JNZ Tuning?

No I have not. Mostly just FP and ExtremePsi because supposedly they are the only ones that port the wastegate path in the turbine housing correctly and not just the inlet lip. It's been 6 weeks since I made the order. Hopefully the wait is over soon, but it seems like everyone has been out since the beginning of May.

Once I get the turbo and can port match everything I'll finally have a nice full exhaust setup.

 

[90blacktsiawd]

Give them a call and ask. Im pretty sure they actually had a couple in stock. 215-997-6850 If you were to bring them to the thread about porting above the wastegate hole and said you wanted it like that they would do it for you.

 

[DSSA]

Give them a call and ask. Im pretty sure they actually had a couple in stock. 215-997-6850 If you were to bring them to the thread about porting above the wastegate hole and said you wanted it like that they would do it for you.

We've ported them that way for years.....

 

[DSMunknown]

Daren P, does yours have the spray paint stuff on it after the flex section and at the welds?

I'm guessing it's aluminized and then they weld it and they they coat the welds to protect them. Does anyone know if the RRE piping is aluminized before or after flanges and hangers are welded on? I'm sure RRE probably gets the piping in aluminized already.

I was wondering that since I got my DP, so I asked Mister Mike. Here was my question:

I was also wondering what the light grey coating in [this link was for] (most prevalently found around the area of the welds). It seems to be some sort of protective coating to prevent rust on the welds or something of that nature. Can you please tell me what exactly the purpose of this coating is, and what it's made up of?

And this was Mike's response:

It is a zinc rich cold galvanizing spray that we put on the welds and flanges. Prevents rust and takes high heat nicely.

 

[daren_p]

I'm going to get some pictures of mine installed as soon as I get the turbo. Everyone's out of evo3 16gs.

Daren P, does yours have the spray paint stuff on it after the flex section and at the welds?

I'm guessing it's aluminized and then they weld it and they they coat the welds to protect them. Does anyone know if the RRE piping is aluminized before or after flanges and hangers are welded on? I'm sure RRE probably gets the piping in aluminized already.

My pipe did have the "spray" on the welds when I received it but just thinking it was your average high temp paint when I got the pipe, I sandblasted the whole pipe & coated it with some VHT high temp, so no more high tech zinc rich cold galvanizing spray on mine

 

[DSMunknown]

^^ There ya go. Badda bing, badda boom.

 

[daren_p]

Well I did the magnet test tonight & found out something interesting, it appears that the only part of the downpipe thats SS is the internal part of the flex section. All the other pipes, flanges, ends of the flex section, were magnetic. Like I said there still isn't a spot of rust anywhere, so thats a good thing. I did find out that my FP turbine housing & O2 housing are SS like they say

 

[90blacktsiawd]

We've ported them that way for years.....

Jesus Josh your everywhere.

 

[DGajre777]

My pipe did have the "spray" on the welds when I received it but just thinking it was your average high temp paint when I got the pipe, I sandblasted the whole pipe & coated it with some VHT high temp, so no more high tech zinc rich cold galvanizing spray on mine

^^^ That's what I did too.

 

[DSMunknown]

Well I did the magnet test tonight & found out something interesting, it appears that the only part of the downpipe thats SS is the internal part of the flex section. All the other pipes, flanges, ends of the flex section, were magnetic. Like I said there still isn't a spot of rust anywhere, so thats a good thing.

Did my own little test tonight. Got the same results. Only the flex section was not magnetic (indicating it's probably stainless steel).

I also took a couple of measurements. The inside diameter of the O2-housing-to-the-DP-flange is 2.5 inches. The inside diameter at the other end of the RRE DP (where it connects to the cat-back system) is 2.875 inches (or 2-and-7/8ths inches).

 

[MaNGiNa24]

Any downpipe with a flex section will work, it's just a pain in the ass to bolt it up.

My Buschur 3" downpipe was a bit of a pain in the ass but it fit alright after about an hour of foolin around with it.

 

[DSMunknown]

Any downpipe with a flex section will work, it's just a pain in the ass to bolt it up.

My Buschur 3" downpipe was a bit of a pain in the ass but it fit alright after about an hour of foolin around with it.

That's a terrible idea. The specific purpose of a "flex section" is to flex when the engine torques or the exhaust system sways, thus allowing for some leniency on the exhaust manifold studs (if you recall, the exhaust studs are holding up a lot of weight already; compounding this with a strained flex section basically guarantees exhaust stud failure). In your scenario, the flex section is already in a strained flexed position, and is unable to flex as it was designed to do. Other potential issues would come in the form of exhaust leaks or other bolts possibly snapping (such as the turbo-to-O2-housing bolts).

Will people be able to bolt on certain DPs to the Evo III O2 housing and eventually have them mate up? Probably. But along will come other issues that could have easily been avoided if the proper preliminary steps were taken first.

 

[nightspeed87]

Yea I wish mines wasnt sitting smack up against the t/c.
I pryed it up some with a crow bar and stuffed header wrap up in between the dp and tc hopeing to dampen some of the vibrations ( In which it did take away a horrible noise it was making ) But its only a bandaid. I need to somehow get this dp angled away off the tc...

 

[MaNGiNa24]

That's a terrible idea. The specific purpose of a "flex section" is to flex when the engine torques or the exhaust system sways, thus allowing for some leniency on the exhaust manifold studs (if you recall, the exhaust studs are holding up a lot of weight already; compounding this with a strained flex section basically guarantees exhaust stud failure). In your scenario, the flex section is already in a strained flexed position, and is unable to flex as it was designed to do. Other potential issues would come in the form of exhaust leaks or other bolts possibly snapping (such as the turbo-to-O2-housing bolts).

Will people be able to bolt on certain DPs to the Evo III O2 housing and eventually have them mate up? Probably. But along will come other issues that could have easily been avoided if the proper preliminary steps were taken first.

Funny story, my experience outweighs your speculation.

I ran my Buschur downpipe for 4 years in New England weather along witht he evo 3 o2 housing and never had a problem with the exhaust studs, manifold or downpipe in terms of reliability.

 

[djseclipse]

Late, I know. I have a 99 gst with the evo housing. A 99 gsx apex gt downpipe bolted up with no problems! No strain on the flex section at all!

 

[donmagicjuan]

Late, I know. I have a 99 gst with the evo housing. A 99 gsx apex gt downpipe bolted up with no problems! No strain on the flex section at all!

Yes, but how did you support the weight of the downpipe? The AWD and FWD pipes have different exhaust hangers.

The biggest problem with the Evo3 O2 housings is that the different angle sends a 2G downpipe straight into the transfer case on the AWDs. The FWDs are a lot easier to deal with, and a 2G pipe can often be persuaded to work without much effort. My AWD pipe, on the other hand, needed about three separate cuts and welds in order to get the angle right to clear the t-case.

 

[djseclipse]

Yes, I had a local muffler shop weld up some braces to support the downpipe.