Stroker or Not

MoparAnglia said
Ha! The pistons don't just travel down further, they travel up further too - put those pistons on a 4-inch arm and they will NOT be .018 out of the hole.

Let me try to explain this better.The compression calculator only reads the top of the piston in relationship to the cyclinder ie:in the hole or out.So .018 out of the hole is the same regaurdless of the stroke.the compression is raised by the calculator by going from TDC to TDC as the piston will only be .018 out of the hole.You couldn't use the kb243 with a 4"stroke as it would be out of the hole probably past the top ring so a piston with the pin closer to the top of piston would have to be used but it could still end up at around .018 out of the hole if the right setup is used but that was 13:1 in my set up.Certainly not a pump gas combo.Most use the dish pistons to keep the CR under 10:1.

BTW I just built my 340 that was from the machine shop when I bought it so no machine work prices.Here is what I did.
$332.00 pistons KB243 .040
$305.00 Rods scat I beams rated at 650 hp
$165.00 cast crank not looking at over 400 hp stock stroke 3.31
$187.00 balance machine work on assemble and rod line bore
$989.00 FWIW gezz didnt realize I had that much in it lol.

Also my new setup each piston rod assy wieghed 233 gams=about half a pound less than the stock 318 setup as this crank is a 318 crank.you should see the holes they had to drill.