Long story short, I was looking for more power in my SCCA track car. I have a hard time keeping up with the $$$ cars on the straights. My previous setup was a fully stock B18A1 LS on 7psi & E85. I never had a true dyno run to see exactly what it made at the time but it was somewhere in the 225 range. Well I picked up a fully built GSR bottom end for very cheap with 10:1 compression. Being on a budget I slapped my LS head on with a blox gasket and ARP studs and bolted everything else back on. I added a 3 port boost controller for boost by gear and a new KTuned map sensor. When I brought it to my tuner he seemed to be struggling to get it to make any sort of power at first. The most we got was 235whp on 16psi. He said my intercooler was too small so I bought a 600hp intercooler and went back for another tune. This time again the car only made 235whp. It didnt matter what boost we threw at it it would not pass 235. He tried changing the fuel maps, timing, ect and the power would drop every time he changed something. Now he's saying my head wont flow enough air to pass 235hp. I see alot of guys making well over 400hp with a bone stock LS head. What could my issue be? It feels slightly faster on the street when I turn it up but not 400hp fast.