If I am not mistaken, I beleive Aaron was telling me that the first guy they tested it on was on E85 and he may not have gained as much as I did with my setup on pump gas as he did with his setup on E85, but idk what his mods were either so


As far as the header issue goes, myself and Aaron have talked about tubular headers over and over......on completely stock setups such as mine (anyone who knows me knows that I have gone through many different header setups) and it always seems that tubulars make more bolt-on hp on pump gas (non E85) than cars on E85. This is why I am going to be putting the Invidia that I got for a killer deal on the car to see what it does over the completely stock manifold that I made 385 with.

 

I'm more interested in what it does on 91 octane then E85 anyway. This and a cam change would likely get me where I want to be on power.

Thanks for the info.

 

What cams do you have now vs. what you are thinking of changing to?

 

I have the older FP/Comp 280+ cams.

Either the FP4R or the GSC S2 cams. I don't want to give up midrange from what I have now and those two cams seem to have the specs that would keep the midrange but get that extra 10-20HP.

 

I also want to change up my cams, but funds wont allow me too right now. Those 2 cam selections are what I am also looking at when the time comes, so I would like to see what they do for your setup.

 

For anyone thats interested a little theory I once read about port shrouded compressor housings .

Long short .
The radial slot lines up with the leading edges of the compressor wheels lower or splitter blades .
When a turbo tries to pump more air than a running engine can ingest you get pressure fluctuations in the inlet tract . Now because the height of the full height blades is greater than the lower ones you can reduce the air that they are trying to pump by giving this air an alternative flow path or escape route out via the slot and ports . This also unloads the wheel to a degree because the lower blades are doing most of the work and the turbine gets the chance to spin the compressor faster without overdoing the air supply . Spool .

When the engine/comp wheel is out of the surge area there is not as great a pressure differential between the higher and lower blades so all "pull together" so to speak .
Its been suggested to me that past the surge zone the radial slot can actually feed some extra air into the compressor blades slightly increasing the wheels pumping abilities . Win win ?
I think you can lose a couple of percentage points of compressor pumping thermal efficiency but overall it looks like you gain more than you lose .
As mentioned you also get to run the larger 84mm bore plumbing to the compressors mounting boss so that can't hurt either .

I wasn't aware that FP had them available to suit the std 16G compressor wheel . Just on this yes the housing has to be machined to suit each individual wheel because the inducer size/blade profile/splitter blades heights are often different and I don't think you can alter where the slot is once machined .

Can Robert Young sound off here and tell us his findings of this housing on a std 9 turbo please .
I like to know what happens if you used this housing with the Titanium turbine and the larger 10.8cm turbine housing sold here in Oz , should be a hell of a std turbo I reckon .

A .

 

not that intrested if it gives a gain but would be a bonus.
i've just fitted a ix turbo to my non mivec 8 and a mate says it will surge in high gears low rpms so if this cover does stop that if i get surge would be great

 

Downshift.

 

ok so i just skimmd thru the thread quick.. sooo if you have a stock iX turbo, you can take off your stock 64mm housing and swap out for the anti-surge 84mm housing?

so pretty much an 84mm housing on the stock ix turbo right?

 

Just buy it your gonna love it trust us.

 

YES!!!

 

Possibly even more reason to run the larger 10.8cm turbine housing GT Pumps sells here in Oz .
To me the 84mm compressor housing sounds like one of the few genuine ways left to scratch every last horse and foot pound out of a standard configuration Evo 9 turbo .

I keep hearing that the single flap 9 type turbine housing is better than the earlier double flap 10.5 cm type , that the larger 9 type compressor housing is better than the 4-8 type , and now FP's 84mm housing better than the std 9 one . Could a 9 turbo with the 84mm comp housing be expected to be good for 40-60 Ho more than an Evo 6 10.5cm turbo ?
I'm just wondering if a titanium turbine and the GT Pumps 10.8 t housing thrown in would give it better response and a bit less turbine inlet pressure at the same time .

I think its as good as an OE TD05HRA-16G cartridge could be made to work .

A .

 

just called FP, its 200, they can't do 75$ like the BBK housing : /

oh well, im ordering it anyways!

 

It'd be sweet if this fit on an 8 turbo, be cheaper then buying a used 9 turbo.
What is the size difference between the 8 and 9 wheel?

 

Im so gonna buy one before my tune. stock ix turbo. I plan to keep this unit on here indefinitely.