People ask how much HP my new 390 have and i say i realy dont know.
What do you dyno guys think
390 +.060 0 decked 10.5/1 ratio,flat top pistons, stock crank,rods, C4 G heads with a "streetport job" mostly
worked on shortside radius, CJ Valves,Ported Streetmaster, 800 DP Comp 282S ,shorty castiron headers
Duraspark with MSD 6 AL.
What HP and torque when working like it should. My guess just under 400/400
what would i gain with say a 294S cam like i ordered but i got a 282s