Port timing on a PP... well the port is never actually ever closed is it
the apex seal is what would close but they're only 2mm wide. So I would say you have 359.8 degrees of inlet timing
From what I can remember carl does 2 different port shapes on a PP, one is a squared of corners port, which gives max power max inlet etc and a D shape port which is more for a less of an extreme engine, more of an endurance engine so I'm guessing yours is the D shape port.
What size were the PP inlets welded too the housings? I'm prett certain Carla largest ones are either 62 or 64 mm diameter?
Are you using IDA carbs? If so what size are they?
Can't say what timing you need to put into it if the engine is running hot, I would suggest a call to Carl and he will point you in the right direction
What length have you done the primary exhaust headers before merging them into one? Varying lengths have a great effect, I learnt all this stuff years ago as my Rx4 was meant to be PP bit I've forgotten it all now! I had even contacted racing beat for advice and got a couple of emails from Jim Merderer himself!
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