The height over port for exhaust is now 22.2? What was it stock?Most that I see are 26-27mm from top of window to the deck and raising it 1.5-2 mm retains the bottom end torque after that it falls off quite a bit aiding only the topend.
He's showing 7.5mm of blowdown. You usually use 6mm don't you? I have a stock jug in front of me and it's 29mm to top of exhaust port and 33.6mm to top of transfers. I couldn't imagine raising the exhaust nearly 7mm to get to 22.2. Something is fishy with those numbers.
Did you actually take nearly 7mm off the top of the exhaust port?
Shouldn't the degrees of the exhaust duration equal the sum of the blowdown and transfer duration?
my jug has been decked so that was 2mm to start
That makes sense because if it was decked even 2mm that leaves it at 27 then if raised 1-1.5mm at the window thats 26-25.5 .I dont see how it ended up at 22.2.
Sorry but that makes no sense that you removed 3-4mm at the bottom of intake etheir,The port calculator shows only 11mm in height from your inputs and they are in the stock range of measurements.
It was a very rough guess. I will check again but was told to aim around the 120 duration for inlet
I geuss you'll just have to see how it performs for your self to see.What happens when the exhaust timming is too high and IMO to much blow down duration is the loss of the exhaust pressure aid pulling the next charge from transfers at lower rpm and then that loses torque due to improper cyl fill.
