This is an interesting compressor upgrade but would require a larger bore turbo inlet.
DMB Upgrade Turbo charger Compressor wheel for Borg Warner KKK K04 K06 BV50 | eBay
I've got one..
Its basically the ttrs compressor wheel. It's too big for the 1.8t comp housing.. And the current 2283 is more than capable of flowing more than the 1.8t turbine housing can take.. And in the k04 tfsi hybrids the comp housing will easily take a 2480 wheel if not larger so again this isn't needed.. I don't know know what application this wheel could be used in tbh.. I know the guy who made them up and think he hasn't sold many....
I was looking at my stock K04 last night and was amazed how restrictive it is where it continually reduces down from the exhaust mani flange to the turbine wheel. I can barely get my finger down there. How much scope is there for porting that area immediately before the turbine wheel and due to it being ubber restrictive and how can we say that it is probably the exhaust manifold that is limiting power when the turbine inlet is many times smaller. This restriction is also causing big manifold back pressures.
What is the dimensions of the custom K16 turbine wheel.
lupos hybrid pending fitment is ported a lot in that area.
we shall see.
manifold is also ported equally as large
no one knows that answer carl
That shoulder looks like it takes a lot of direct heat and gas on it but once its opened up there less of a face/restriction into the turbine. When you you open the wastegate up to stop creep you remove a fair bit already. I guess time will tell on whether it affects the housings and if its prone to crack more.
Have you had a recent spec upgrade on these as there seams to be a bit of a buzz on facebook regarding a Super sized version.
Bill, BBT, anyone fancy making an adapter plate like the tapered ones used for throttle boddies on the various intake manifolds but only this time used for tapering the exhaust housing in a ko4 turbo to fit the smaller typical 3 inch down pipe. Ie 83mm to 73mm (ported turbine exit on exhaust housing necking down to internal downpipe diameter.Maybe 12mm thickness.see post 198
I've just had flanges made that are identical to the k04, so you only need to flow the actual downpipe pipe inside the flange..
line the inner edge on the side of the turbine and the other side, heat and knock out, or fill weld it so to make up the gap, less important the other side as it's the waste gate.. I've done this same principle on the tfsi..
Unfortunately mines a blueflame where the pipe enters the flange. I did consider getting it built up with a heavy weld and grind it away with a die grinder, the adapter plate will ad volume though.