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#1
02-14-2022, 10:35 PM
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Help with projected HP and camshaft selection
I am building a 455 stroker and need some advice on HP projections and camshaft selection. I will be using a hydraulic roller and have been advised to use solid roller lifters. My target hp goal is 650 to 660 hp, pump gas, power brakes with street manners in a 3900 lb car with a 4 spd M-22 transmission. 73 455 block bored .060 over with zero deck. Compression is 10:6 to 10:8.1. I have attached head flow numbers and a suggested camshaft grind. This car will be mainly driven on the street.. What advice or suggestions do you have?
73 455 block bored .060 over with zero deck height 474 stroker Ohio forged 4.25 crankshaft Weisco flat top pistons 10cc valve relief Crower 6.700 sportsman rods Kauffman High Port heads Northwind 4500 intake Pro form 850 carb Doug’s headers 12 bolt GM reared with 3.73 gears Muncie M-22 rock crusher transmission MSD ignition Flow bench results Lift Int. Ex. Int/Ex ratio .200 134 134 100% .300 201 186 92% .400 260 227 87% .500 306 255 83% .600 332 265 79% .700 342 271 79% .800 350 277 79% Recommend Custom camshaft grind. Hydraulic Roller 254/262 duration @ .050 .570/.570 lift with 1.52 r .627/.627 lift with 1.65 r 111 LSA Solid roller lifters with .007 lash 200 lb on the seat
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Pure Pontiac Power!!!   Picture of my actual 69 Judge racing in 1970. Rare Espresso Brown Ram Air III, 4 speed, manual steering with power disc brakes and factory build sheet indicating 4:88 special order rear axle. Last edited by mpmsmuscle; 02-14-2022 at 11:05 PM. |
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