[snowman]

Well for one it isn't a T camshaft, its an S "like" camshaft in both cases. I have put the T spec cam in and got guess what, 125 HP, very close to the actual number of 130 HP, a dyno test result. The point was to compare the HEADS not the cams ect. The intake airflow is arbitrary, I set it high as to not interfere, ie limit the response. The reason, you can put whatever intake and carbs on the engine you want, no limit on air flow. In practice you wouldn't go this large to get good performance, but large enough to get the same performance. Hope this makes sense to you. As to the accuracy of the program, I have found it to be within 5% for every engine I have ever put into it. BMW M6, Chevys, Porsche, Honda.

As to real 2.2 heads, I have previously flowed and posted the results, which are totally consistant with what I got this time. I have also previously posted the HP numbers, which were in very close agreement with the Porsche numbers, This is where I asked a question, I noticed that retarding the cam timing, using a stock T cam, increased the HP, a lot, all the way up to 150 HP with 10 degrees retarded. I have analyzed this result as well as I could and determined that Porsche simply tried to "detune" an S engine to come up with a T version. It was actually probably more difficult to detune it than enhance the performance. The T also used a cast crank, non shot peened rods, cast iron cylinders to try to lower the cost.