Well I did end up replacing the o2 housing with a buschur housing and it is still doing the same thing.

The exhaust side was ported just like they look on forced performances website no more no less. I mad sure nothing else was ported.

Here is a link for what it looks like

http://store.forcedperformance.net/m...=Turbo-Porting

Well the thing is the creep that kills me. If I do 30psi I want it through the entire powerband. If it hits 20 I will be at 30 by redline. If I hit around 30 at a spike **** I would be way past 30.

 

Not necessarily. Try setting peak to 24-25#, then it should just creep to 30ish and then taper down a bit by redline. Just throw in some high octane gas and try it. At least I hope this is going to happen.

Another option is to enlarge the merge hole on the Bushur O2 and try it again, just to see. Alternately, if you were to throw a HF cat on it should eliminate the creep due to the increased backpressure(it'll rob some ponies though).

 

I already tried it, I ended up at 35psi @ 7200 and I let off the throttle

 

You´re a trooper man! You´ve tried just about everything that I can think of. From the beginning I have suspected that it was the unported WG bypass port in the turbine housing. You´ve systematically eliminated all the other possiblilities, that have been suggested, one by one.

You see, the port work pictured in your link does not include porting the wategate´s bypass port at all. They gasket match and deep port the twin inlet ports down to where the WG bypass ports initiate. They also port the turbine discharge area of the housing which unshrouds the turbine wheel´s exducer.

Correct me if I´m wrong, but the porting shown relieves back pressure within the housing and speeds the wheel´s spoolup. This type of porting adds horsepower by reducing backpressure and improves spoolup, but this work would really only exacerbate the problem of inadequate turbine bypass.

The type of port work pictured doesn't do anything to help control boost. In fact, the turbine wheel spins more freely and spools-up faster, so the internal wastegate´s job is compounded because a freer spinning, and faster spooling turbine wheel is more difficult to slow down.

So if flow through the main housing is increased substantially without improving the bleed off capability of the wastegate bypass port(s), then you could get what you are experiencing. The too sharp 90* initial turnin radius(radii actually, since there are two) needs to be opened up to facilitate the bypassing of more of the exhaust flow out through the WG bypass port.

The exhaust gases flowing straight through the housing are like a huge mass of bumper to bumper traffic flowing at 85 MPH down the four lane San Diego freeway. Then all of a sudden they all have to make the right turn onto the next exit which is a tight 90* job. Of couse most of the traffic can't make the tight turn and they keep flowing straight down the freeway. Too many people in the theatre and the fire exit is too small!

 

WOW, I am having the same exact issue on a car I tried working with last night. We did ABSOLUTELY exactly what you did/have done and cannot get any results. Boost jumps to ~22psi and then quickly creeps to ~30psi -no matter what we've tried. This poor gentleman's car has had the exhaust housing switched out already, wastegate switched out, and yeah....FRUSTRATING. Please PM me if you come across anything that actually WORKS. Thanks!

 

Hope I don't have this problem .

 

What kind of boost controller are you using? I'm just curious.

Yeah me too. I'm doing a pretty aggressive stock motor build for my red turbo. I only really want 25psi on pump.

 

Just wanted to chime in here.

I have sold and installed countless FP Red turbos, I port them all by hand in the turbine housing.

I have never seen one have any boost creep what so ever with a ported turbine housing and proper 02 housing

Al

 

Yes. I think that they may just need a little bit of hand grinding to ease the transiton into the bypass port. I did it on my Green too!

EDIT: I think that the single-flapper wastegate bypass port design is a little bit more prone to creep than the dual flapper design. I haven't had either of my dual-flappers creep, but both the single flappers did.

 

This issue Robert at FP had with the EPM o2 Dump was he was concerned if someone wanted to run low boost on the FP Red; Boost around 16-18lbs. Our Wastegate Tube is 2 inches 44mm, that is really big. GT 35-42 big.

Apparently it has nothing to do with our EPM O2 Dump Housing as the switch over to another but well know good flowing O2 Housing didn't cure the problem. I've talked at length with the OP about this. There seems to me that there might be an Internal WG flapper ala; Turbo problem...

 

Exactly and Q you have been more than helpful during all of this! Thanks again!

I am going to call FP monday and see if they can send me a new hotside, I will follow-up with my results, thanks for all the help from everyone... wish me luck haha

 

--M-- Just let me know if there is anything that I can do to help.

 

yes but maybe there is an issue with the flapper

 

Hmm, we'd have to look at it. There is not a whole lot that could go wrong with a flapper valve assembly per se. To possibly cause creep it would have to not be opening completely I'd think.

 

I never meant to imply that the EPM dump might be causing the OP's issue. I personally feel that the EPM dump is the best O2 elbow option available on the market today, bar none. It is a superior design period, IMO.