Finger ports, how to find where to put them

[Fast Fred]

then install, no rings, with bearin, snug is good, at TDC transfer the marks from the crown to the deck of the block.....

[Freddie Webb]

Do you have a dyno or access to one?

[quty06]

love to see

[Fast Fred]

on a Stinger, or Yamaha 70 or a SST60 , it's about 10, 10hp total . on a 30hp be less. on a 90hp Yam be more.

[sharpeye Mike]

Is this part of your 56er six pack build thread Fast? Or is that thread dead
Never liked where the ring pins line up, after marking the pistons and cylinder walls I always shied away from cutting into it .

[Freddie Webb]

Which dyno software are you using? Are you set up to dyno at the propshaft or the crankshaft? In what rpm range did you see the 10hp gain? Are you set up to dyno other motors as well or just the three bangers?

[Freddie Webb]

Could you please print and post a dyno spread sheet on this? I would love to see the the torque curves as well as the horsepower. Thanks in advance.