Originally posted by CRX-YEM@Oct 16 2002, 08:48 PM
B, I have to say psi has something to do with it.
the more positive pressure you push into the cylinder. the higher the cylinder pressure will be. ther'll be more force on the cylinder walls.
Pressure = Force/Area
Force= Pressure x Area
if your pushin 9psi into a cylinder that's 75mm bore x 84.5 mm stroke (which has a surface area = 2 pi r 2 rh) that's gonna have a good sized reaction force.
r=37.5mm (1.47 in) , h=84.5 (3.32 in), pressure = 9 psi
(9 psi) x ([2 x pi x 1.47 ^2 ] [1.47 x 3.32])
(9 psi) x ([13.57 sq/in] [4.8804 sqin])
9 psi x 18.45 sq/in = 166 lbs/sqin
that's 166 lbs/sqin of reaction force acting on those cylinder walls.
plus whatever forces are already being generated from the stock setup.
I guess the volume of air ther turbo can flow has more of an effect of how much volume of air/fuel mixture gets into the cylinder but pressure has an effect as well