We are working on a custom lower/upper manifold to allow for the additional port injection for those that are wanting/needing it. As far as going over 500hp you can easily do that alone on GDI as we have a customer car that is doing 625whp still on stock GDI injectors and HPFP. The bk1 lower doesn't fit onto the bk2. As far as fuel control that is all being done directly through the stock ECU and can be handled/tuned by any Alphaspeed dealer near you when your ready to tune.Ive been looking for information regarding port injection on the bk2 engine. What are people doing over 500hp. Does the bk1 lower intake fit on the Bk2. Also what are you doing for fuel control?
Well let me know if I can help with supplying parts as I handle a lot of the communities engine builds or supplying the components they need for their builds. Most people that boost on stock motors aren't making over 500 because your looking at very weak piston ringlands and especially for an engine that wasn't built for boost from factory. With GDI you can keep the same compression and your going to push to the fuel limitation before you push a built engine limitation. Trust me i'm with you and the stuff just isn't cheap especially for limited runs or 1 off projects.Im actually doing a build now. just wondering what direction to take. I see most people build turbo setups on stock motors and dont make over 500. Wondering if its rods or too much compression. The other side of it is the fuel. thats why I was thinking install lower intake and do both DI and port.
I cover everything for the 3.8's to include both the BK1 and BK2 so not hard to get at all for me.Good luck getting aftermarket internals for the BK2. Because it's direct injected, the piston face is shaped differently.
People say you can use aftermarket BK1 internals, but IIRC those people are also running a turbo. Doing this will lower your compression, which is more ideal for a turbo setup.