Originally Posted by 1981zapper
I’m looking at building a 355 for my 1981 Camaro Z28, Here is what i have picked out, some of the parts i already have;
-Edelbrock Performer RPM Cylinder Heads 64CC #608919
-Howards Cams Retro-Fit Hydraulic Roller Camshaft and Lifter Kit #CL110245-12 (Lift; .500 int./.510 exh. Duration @ .50 225 int./231 exh, LS 112, RPMRange 1,800-5,400
-Scorpion 1.5 Race Series Rocker Arms #SCP1000BL
-Professional Products PowerForce Plus Harmonic Dampers SFI # 90000
-Lunati Street Race Rods 4340 I-Beam
-Ross Racing Forged Flat Top Pistons #90456
-GM Cast Crank
I did a Compression Calculator and my Compression is coming out at just under 10:5:1 with a 0 deck, do you guy’s think with this cam & compression I’m able to run her on 91 Octane?
And any inputs on what kind of HP / TQ this motor can be making?
This is a lot of compression, what is the intended use of this car. What is the gearing and tire size and the transmission.
With a Holley 750 cfm 4 bbl, on a Performer RPM intake, with 1-3/4 tube full length headers, a really good CD ignition this could pull about 400 horses on an engine dyno. But this power level takes really good parts matching and tuning, even slight deviations will drop the crankshaft power 30-40 horses very easily.