BH5 exhaust

[Skinon!]

Ok i got this exhaust off of tardme, and installed it the other night. Good news was that when i got the exhaust it actually appeared to be of very high quality and i thought it was just from the twin turbo 'Y' pipe, but turned out to be a full exhaust from the turbo exhaust housings back.

I have read heard about if you change the exhausts on these to a 'full' exhaust you can easily overboost the primary turbo. So i just installed the exhaust from where the turbo pipes join, so 2 and a half inch from there back with two resonators and a muffler. Sounds extremely good! Nice and deep and not too loud.

But my question is, i have these pipes remaining to replace the turbo down pipes, and am wondering if you guys think they would be alright. I could trial and error of course and unless someone has a definitive ( or close too ) answer, i'd rather try save some time first.

Also, the reason i ask is because the primary front pipe has a (resonator?) chamber on it, that makes me think it has something to do with helping the primary not over spool? Wishful thinking i know... but it looks like a really well made exhaust and come off a car the same as mine that had been crashed, so maybe im thinking some research had been done and this exhaust should work?

Anyway heres some pics...

[Jord]

Looks very similar to a Syms system, but its a 3 piece one rather than the normal Syms 2 piece. Ive got a Syms one on my car,very good quality worth $2k new.

[subieboy]

Install them, worth the effort.

If any issues buy a boost controller

[Skinon!]

 subieboy said:

Install them, worth the effort.

If any issues buy a boost controller

Yea? May aswell, a decent electronic boost controller should be able to control the spike im guessing.... what would be the purpose of that chamber on the primary down pipe?

Jord, How much boost are you running through yours? Assuming you have a bh5?

[subieboy]

Not sure what the idea behind the chamber is but probably related to flow dynamics...

I run a Profec B Spec II (with remote switch), in hindsight I would go with the Profec e-O1...

[Skinon!]

Yea, about that chamber. I wonder if it has anything to do with maybe keeping the primary from over spooling... Didn't reeeeeeally want to get a boost controller but will if i need it.

[Swindog]

What are you doing with the factory diff back muffler? Wanna sell it to me?

[Jord]

BE5. Was running 11 pounds with parallel set up. Now running stock setup 15psi on primary (overboost,due to other problems) but it goes well, very quick spool

[funkytown]

The resonater will give you a little more back pressure (helps stop overboost) and might keep the noise down a bit.

just depends on internal design

[Skinon!]

Swindog, yea i got the diff back part, i did cut the cable that opens the exhaust flap but it's all mint.

Well i may aswell chuck the whole thing on then and see how it goes, just watch the boost carefully... Stoked with being able to get rid of the cat tho, it was roooooted!!! So now it goes alot better and it uses so much less fuel haha WIN