Air filter for UrS4 with HX40

[button]

Hi.
I put to my car Holset HX40. I use chinees ExManifold and weld to it T4 flange (with some mods). "Turbo kit" looks fine:

Bo I don't know what air filter I should use. Between turbo and lamp I have maybe 3 inch free space. Turbo have 4" inlet. In Poland I can't get HKS or HKS style air filter with 4" outlet.
Maybe you have any ideas in this topic? I even thought already to stretch on turbo some rag, but I do not know if he will hold out such pressure of the air and fulfils his task well

[A80Avant]

im not sure if even a HKS mushroom will fit there itself....maybe just a mesh on the turbo and fingers crossed?

[Billman]

Tell us what is the compressor inducer of this turbo and what kind of turbine housing do tou use (16 or 18)? How does the car runs?

[kritis17]

I had the same problem. The HKS mushroom didn't fit so I had to cut a K&N and to fit it. I don't think this is the best idea but it worked for me.

[button]

I have 19 exhoust housing and now I know that is not for my. Turbo spool-up between 4300-4600rpm. I have anormous boost creep, and I haven't got any positive drive expirinece with it. I'm looking for HX35 12cm^2 turbine housing without TwinScroll for better spool up. In HX40 "hot side" Ihave TwinScroll, and I don't know how to build divided manifold in in-line 5 cyliner engine.

[Billman]

you can knife edge the divider between!

W\Do you have any pictures of the compressor impeller of your turbo?

[Jamo]

Connect the filter to the turbo using ducting allowing you to move the filter lower down or by where bonnet grill

[button]

Billman, I have this done, but still this is not that I want.

[Billman]

did you corrected the problems with your car? how does it runs now?

[TurboTransAm]

You can insert a blanking plate between the exhaust manifold and the turbo hotside housing. Blank off one side of the scroll and you'll halve the A/R by sending all the exhaust down the other side. Reversing the blanking plate will slightly alter the spool characteristics as one side sends gas to the inside of the turbine wheel and the other side goes to the outside. It costs next to nothing to fabricate a plate. You need 4 holes for the turbo mounting pins to go through to hold it in place and a hole the same size as one of the scroll ports. So if your A/R is normally 1.02 for example - you can reduce it to 0.51

Of course this isn't optimal and the right sized turbo would be better. However, you may as well try it before you start spending more money on another turbo.

Adam (Holset Veteran)

I have 19 exhoust housing and now I know that is not for my. Turbo spool-up between 4300-4600rpm. I have anormous boost creep, and I haven't got any positive drive expirinece with it. I'm looking for HX35 12cm^2 turbine housing without TwinScroll for better spool up. In HX40 "hot side" Ihave TwinScroll, and I don't know how to build divided manifold in in-line 5 cyliner engine.

[TurboTransAm]

Oh yeah - if you only run the car for jollies as opposed to a daily driver you can make your own airfilter. Go to a supermarket and buy a wire mesh cullinder (for straining vegetables) and cut out the mesh so its about an inch bigger all round than your 4" turbo coldside inlet. Clamp it in place using a ring clamp and ensure the mesh face is pulled tight so its almost flat. If you leave it slack the turbo will suck it in under load.

Adam.