Hey guys, Im thinking about fabricating a "bolt on" tubular manifold for the s5 t2. I'm thinking about keeping it twin scroll. I'm sure plenty of poeple have stock turbo's or affordable Hybrid turbo upgrades for thier s5, and are stuck with factory manifolds

How many people would be interested in buying something like this?

How much would you be willing to pay?

I'm debating on the material to use for this. I personally would like 321 SS, but that would also raise the price of the part. I would really liek to make this part really sturdy and overkill. Good thick material with gussets,and nice TIG welds, but that would also depends on the price.

A more affordable idea is using pretty thick mild steel MIG welded at a very affordable price

I really dont know if I will be doing this jsut for myself, or if anyone else will be interested

 

wow a stock replacement twin scroll for s5 t2
i definately would buy from you because you definately sound like you know what you are doing.

 

I talked to my boss about it,a nd he was thinking about thick mild steel. Later I talked to my buddy,and he said the same thing.

I was more shooting for nice 321 stainless.

I will try to make one for my car first and see how it goes. It might take me a while to setup a jig and finish everything.

 

What about 304SS? Its priced inbetween mild steel and 321SS.

 

You need to look a little harder at the S5 manifold. Without moving the turbo (meaning it won't be "bolt-on") there's no way a custom manifold is going to flow any better than stock. It already takes the most effective route between the two fixed points. It may not look very flash on the outside, but on the the inside it's no different to a tubular manifold.

 

I think you will find few buyers, and certainly not enough to justify the development of the manifold. People who want aftermarket manifolds are doing full turbo upgrades. People with stock turbos and hybrids are on limited budgets.

 

I think this statement is very true.

 

Here's the fundamental question the first post put into my head:

Why?

What possible need is there to replace the stock S5 manifold with something aftermarket and still retain the stock turbo?

 

the manifold isn't the restriction with the stock turbo in place........the exhaust housing/wheel of the turbo is. Thats why boost is instantaneous witha stock TII and why boost peels down at redline.

 

From what I remember about the manifold it doesn't seem like you can get more direct flow that the stock manifold. I'll look again tomorrow but I don't see why it's necessary. Maybe if you have an aftermarket turbo but for the stockker/hybrids??

 

haha. Yet another fabrication related thread being discarded.

 

As it should...

 

So the factory manifold is as good as it gets, as far as stock lines, turbo placement and such?

I know there are a lot bigger turbos, but I am very happy with my to4 hybrid. I know BNR is selling the 60-1 setup that is suppoised to put out good power too.

I was thinking, "what if I could make s5 t2 tubular manifold and also offer hybrid turbo's also?"

Now you guys got me thinking if a tubular stock replacemnet would flow better than the stock s5 one. Or at least look cool and sell. Not that you will really see it. Im sure I wont spend too much money on making it. Allowing me to sell it for affordable peices. More than the SS autochrom stuff but cheaper than everyone elses

Making a full turbo kit would not be a bad idea either.

 

This was you idea so you tell us. How could a custom tubular manifold be an improvement over the stock one? You're working between two fixed points very close to each other, so how are you going to connect those two points is a better way? The rear passage doesn't even have any bends.

How could it? Like I said, go look at one. How is the inside of a tubular manifold going to be any different to the inside of the stock one?

 

You might save 1 or 2 pounds in weight, but thats pretty much it! LoL

 

I was actually looking for something like this about a month ago.

I bought a S5 turbo but the manifolds are getting scarce.

I've got a FMIC on the project car so placement wasn't an issue.

I also figured it woudl help when I went to a BNR stage 2.

 

ive actually been looking at building one for myself (an S4 instead of an S5) mostly, because the S4 manifolds ALWAYS crack, and im sick of replacing the gasket that blows everytime. it is a good idea, and im going to start working on it for my S4 as soon as i get a few other things out of the way.

 

The stock placement of the turbo is already supported by direct replacement downpipes.. if you start messing with the placement of it, then youll have to redo the downpipe to fit it. That costs extra money. I personally wouldnt buy an aftermarket manifold specifically for that purpose. If im going to redo my IC piping and Downpipe as well as spend money on an aftermarket manifold, I would just do a bigger turbo upgrade not do it just so it looks cool. Now if you make one with a T4 flange and an external wastegate, that might be a better idea IMO.

 

What about a tubular manifold, that will work with a nonturbo lim with the stock turbo, or a bnr stage 4, without fitment issues? How about adding the option of a wastegate flange, so we can help get rid of boost creep without having to send the turbo off for an upgrade, or port it?

Universal manifold with a stock flange, I would buy one, it'd be easier to have an exhaust shop modify the downpipe/mid-pipe, than to do a T2 swap, or fit a T2 lim to the 6 port engine. Or make a spacer, and still have to have it look ugly and make a custom exhaust piece.

Hell, if it were available, i'd buy something like that right now, then when i do have a t2 i can sell it, and i'd be sure someone else would want it.

 

you may find some demand for a manifold/downpipe combo that will work on an n/a block

 

Putting the turbo on the NA block is probably the only reason to build a manifold such as this.

Even still, how many people are going to be willing to pay the $600-$800 it will cost?