ProMaxx 2151HR Series One 185 SBC Cast Iron Hydraulic Roller Heads

Fits Vehicle SBC

The 185 Vortec has taken the Vortec head to the next level. A bigger runner and bigger valves mean more power!  Just ask dirt track racer Shawn Guffey, who has won every race and back-to-back track championships since installing Vortec heads on his A Hobby ride.

Features:

• Series One SBC 185 Vortec Cast Iron 2.02/1.60/64cc Straight Plug Assembled with .600″ Hyd Roller Springs (Pair)
• 185cc intake runners
• 202/1.60 valve size
• Screw in studs
• Large spring pockets
• Multiple intake bolt patterns
• Multiple valve cover patterns
• 906 casting number
• Hardened seats
• Machined and Assembled in USA
• Assemblies include: 21-4 valves 3/8 stud guide plates
• Sold In Pairs

Flow Chart

Cylinder Head Options

Technical Specs

Combustion Chamber ……64cc
Weight …………………………110 lbs. Assy / 100 lbs. Bare
Intake Runner ……………. 185cc 200cc
Exhaust Runner …………..62cc
Intake Valve Size …………2.02″
Exhaust Valve Size …….. 1.60″

Spring Pressure
Hydraulic Flat Tappet .575″ max lift
Closed………………………..115 lbs. @ 1.800″
Open………………………….310 lbs. @ 1.225″

Hydraulic Roller .600″ max lift
Closed ………………….. 145 lbs. @ 1.800”
Open ……………………. 325 lbs. @ 1.200”

Solid Roller .700″ max lift
Closed…………………..230 lbs. @ 1.900″
Open…………………….600 lbs. @ 1.200″

Valve Guide ……………Cast Iron
Valve Seal Material … Viton
Retainer Material ……Steel
Valve Job ……………… 5-angle
Head Bolts……………. ARP 135-3601
Valve Spacing ………. OEM
Valve Seats ……………Hardened Steel
Intake Gasket ………..Fel-Pro 1255
Exhaust Gasket ……. Fel-Pro 1404
Head Gasket ……….. Fel-Pro 1014, 1044 or equivalent
Spark Plug …………. Tapered Seat Plug-AC Delco R44LTS

Brand

ProMaxx