Replacement Valve Seats
Here's a recent port map with the 45 degree seats, 550 lift, 282 cfm. For a variety of reasons, I'm starting to suspect my pitot tube reads low. Just got a new one from Bruce at PTS yesterday. Hope to try it tonight.
However, the 264 fps average (from the pitot) at the SSR, and the calculated average of 270 fps based on 2.5 square in area at the SSR and 282 cfm are not that far off.
Floor is not raised, but I have tried that with clay. Didn't help. If anything, the floor is effectively lower because the valves have been sunk 0.090".
Here's a recent port map with the 45 degree seats, 550 lift, 282 cfm. For a variety of reasons, I'm starting to suspect my pitot tube reads low. Just got a new one from Bruce at PTS yesterday. Hope to try it tonight.
However, the 264 fps average (from the pitot) at the SSR, and the calculated average of 270 fps based on 2.5 square in area at the SSR and 282 cfm are not that far off.
Floor is not raised, but I have tried that with clay. Didn't help. If anything, the floor is effectively lower because the valves have been sunk 0.090".