Damn when you spell it out like that cost add up quick. (note: I am no expert but...) at 400hp that trans is going to break. I think 300 is really doable and damn fast for 2300lb car. That is where I guesstimate mine at 15lbs. At 400lb you are pushing cast pistons and may need some port work and a good tune/meth injection.
12000k to spend you might as well go 2j or rb30. TimO knows high HP L28
I saw it on FB . I am interested but was wondering about performance. Keep in mind that I very far from being an expert but wouldn't you run a chance of going lean with the injectors so far up on the runners ? and are the runner openings bigger than the head openings for the intake valves ? just some thoughts
It certainly looks like it would flow better and it looks as if the runners do not tapper like the stock ones which would allow for a lot better flow.
DC
I may have disagree . the price for z cars are going up cant find too many 240s , coil overs, lsd,t56 and aluminium heads aren't cheap. yes 15 is a little high maybe 12ish
Just my 2cent. I have the same kit except mine is tuned for 420cc injectors. Now I have sunk ring lands on a forged pistons, but they were 10 years old and I had other issues. The JWT set is untunable the only thing you can do is adjust the Fuel pressure regulator. Thats is an impressive amount of boost I think you are pushing your set up . I assume you are logging through your boost controller ? perhaps look at duty cycle and make adjustments there? If your set up is like mine you are using a relay and not the ECU to control the fuel pump. I am interested to know more about your set up . what kind of pistons? head work ? how much boost /HP ?