Check out my buddy 325 turbo setup PICS

[matt325is]

Dusty, how does the exhaust sound without a muffler? You dont have any pictures of your exhaust system do you? I am in the process of building my 3" mandrel bent exhaust system.

Thanks man

matt

[kylebes1]

same

what type of header are yo running?

Does any one think that an equal length header woudl not be worht the trouble?

[diegom6]

*BUMP* what are you doing with your high beams Dusty? Are deleted now or will use them again.

[diegom6]

oops! forget that question, already saw the answer here.. " http://forums.bimmerforums.com/forum...32#post2331432
:oops:

[89325iturbo]

No i don't have pics of it Matt. It just dumps out pretty much on the side of my front tire. it doesn't run back the length of the car, I might just keep it that way though. With it being that short its definately loud, but it also makes the sound of the turbo spooling a lot louder. Hows your car, have you had any trouble with it.? What psi are you running at the moment? thanks

[kylebes1]

Re: same

*bump*

what type of header are yo running?

Does any one think that an equal length header woudl not be worht the trouble?

wondering for future reference

[Widebody325]

Re: same

*bump*

what type of header are yo running?

Does any one think that an equal length header woudl not be worht the trouble?

wondering for future reference

Equal length turbo manifold will make a big difference. But good luck finding one.

[iXer]

Im not concerned about the exhaust back pressure. Its a 3" downpipe dump out. No cats no muffler, no anything. If the exhaust back pressure is what your talking about.

I'm talking about exhaust manifold pressure, before the turbine. With a small turbine housing, the exhaust manifold pressure can be 2 bar or greater while the intake manifold pressure is less than 1 bar (actual boost). In the valve overlap period you will experience reversion, the wilder the cam the worse it will be! Sure you can increase boost but that only results in greater reversion and less power. The intake charge temperature will also be higher than it needs to be (you risk detonation). Keeping the ratio of exhaust/intake manifold pressure below 1 (2/1=2 above) is preferable. If I were you, I'd check this out before raising the boost further.
To measure the pressure in the exhaust manifold before the turbine; weld a bung on the manifold so you can connect a pipe (3-4 mm ID) about 20 cm long, and connect a regular boost gauge to it. The length of the pipe is for keeping the heat down. Now this may be a bit difficult on your log type manifold but you get the general idea..
The bung can be used for exhaust temperature probes as well.. always good to take the temperature of your favorite possession. :)
Since you have a good sized downpipe and proper intercooling you have decreased some of the problems you can face when raising the boost.
Now I may sound like I don't like your setup, that's not why I'm saying all this. I just don't want you to make any mistake with what is a killer setup! Sure you can improve on it, but you probably already know how much money can be dumped into that hole..

[89325iturbo]

Thanks- your giving some good information. But im also not concerned about the back pressure before the turbine either. The turbine is a pretty decent size as well .63 A/R housing HIGH FLOW 76 TRIM stg 3 wheel. As of right now im not running any boost, just breaking it in, but maybe i can set something up to check the exhaust pressure anyway like you said. Dusty

[diegom6]

Thanks- your giving some good information. But im also not concerned about the back pressure before the turbine either. The turbine is a pretty decent size as well .63 A/R housing HIGH FLOW 76 TRIM stg 3 wheel. As of right now im not running any boost, just breaking it in, but maybe i can set something up to check the exhaust pressure anyway like you said. Dusty

Off topic, but how is runing your engine? The loud noise gone?

[89325iturbo]

The ticking noise is still there. I had a local engine builder listen to it, and he said it was the valves ticking like i originally thought. When im driving the car it feels fine, it doesn't feel like anything is running wrong. I adjusted them one more time when it was cold to .010. But the noise doesn't change. So i don't understand it, im just going to drive it and see if iti quiets at all. The thing is the ticking seems to get louder as it warms up, the opposite of what i thought would happen as the car gets warm. But once its warm the noise stays the same.

[FooFu]

REALLY CLEAN!! Nice Setup! :)

[GaryE30]

That is complete SEX!!! :shock: