FLOTEK’s medium sized 290cc oval port cylinder head with 112 combustion chamber is recommended for moderate street or street/strip big block Chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. Capable of flowing 367 CFM at 0.600″ of lift; tested on Super Flow Bench 1020. It may be necessary to slightly clearance or modify the the piston due to our more efficient heart shaped combustion chamber design with some domed aftermarket pistons, most of the newer designed dome profiles will clear. FLOTEK recommends material be removed from the piston and not the cylinder head. Our combustion chamber shapes are very critical to flow and altering the cylinder head can unfavorably affect flow and power performance. It is the customer’s responsibility to verify proper piston to head clearance. Heads are designed for 3/8″ pushrods. Larger pushrods will not fit without clearance and is not recommended since some areas are very thin. FLOTEK recommends the use of .120″ thick-wall pushrods.
HYDRAULIC ROLLER (Part# 290-6056) – PSK573-1-10 Up to .725 Lift CL 225# @ 1.90 OP 530# @ 1.28 C/BIND 1.18 O.D 1.55” Dual W/D I.D. 0.75
SOLID ROLLER (Part# 290-6058)– PSK623-1-10 Up to .750 Lift CL 290# @ 1.90 OP 625# @ 1.30 C/BIND 1.17 O.D 1.62” Dual W/D I.D. 0.74
SOLID ROLLER (Part# 290-5059) – PAC1224 Up to .850 Lift CL 275# @ 2.00 OP 810# @ 1.150 C/BIND 1.100 O.D 1.62” Dual I.D. 0.85
PAC, MANLEY, COMP CAM SPRINGS & CUSTOM BUILDS ARE AVAILABLE UPON REQUEST.
- Headers will bolt on in most applications. Some may have interference.
- Recommendations: Hooker Super Comp Headers
- Stock Bolt Spread
- May be necessary to use lowered motor mounts