Dart PRO1 Small Block Ford Platinum 195cc/62cc 20° Aluminium Cylinder Head Assembled suit hydraulic roller or solid flat tappet cam. .620" Max lift
Serious performance upgrade for street, mild bracket racing and oval track racing. Maximum torque and throttle response from idle to 6,800 RPM. Best for 347-427 cubic inch engines. Works with most standard components.
PRO1 20° 195cc Aluminum cylinder heads feature increased airflow for larger engines and higher RPM usage.
Standard valve angle and spacing is retained for bolt on compatibility. Exhaust runners are raised .135” for improved flow. Manganese Bronze valve guides are used for long life, and hardened valve seats provide durability with unleaded fuels. Features both 2.500″ and 3.000″ exhaust bolt patterns.
Assemblies include Stainless Steel valves, premium springs, locks, retainers, studs, guide plates and seals.
• Heads are sold individually.
Part# 13211112
Material: RMR Cast Aluminum Alloy
Comb Chambers: 62cc
Intake Valve Dia: 2.020”
Intake Port volume: 195cc
Intake Port Dim: 2.000”x 1.125”w
Int Port Location: Stock
Intake Gasket: Fel-Pro # 1262
Exh Valve Dia.: 1.600”
Exh Port volume: 65cc
Exhaust Port Dim: 1.350” x 1.350” w
Exh Port Location: Raised .135” Standard Ford pattern (2.00” bolt centers)
Exhaust Gasket: Fel-Pro # 1487
Flow, Intake: 288cfm @ .700” / 285 @ .600” lift / 28”
Flow, Exhaust: 185cfm @ .600” & .700” lift / 28”
Head Bolts: Dart PN# 66230010 (7/16 w/ inserts)
Dart PN# 66230011 (Std. ½”)
Head Studs: Dart PN# 66130021
302 block 1/2"-7/16” stepped washer ARP# 154-4005
Manifold: Most with standard port location
Milling: Min. 50cc (.0065” = 1cc) Flat Mill
Pistons: Most 20°aftermarket pistons.
Push Rod length: Should always measure
Push rod Guide Plate: Dart adjustable PN# 27001410
Retainers: Steel (10°)
Spark Plug: .750” reach, gasketed
Spring Pockets: 1.550” OD (.050” deeper max)
Springs: Our Assembly: 1.437D = 130# 1.800”
Valve Length: Std. = 4.915” / 5.015” (+.100) roller
Valve Stem Dia: .3415” - 11/32”
Valve Train: Uses roller rockers 3/8” or 7/16” stud mount
Valve Guides: .439” o.d. Mag-bronze (.002” press)
Valve Guide length: 2.250”
Valve Guide clearance: .0014” - .002” (with our .3415 dia. valve stem)
Valve Guide Spacing: 1.876” moved .050” from stock
Valve Seats: Powdered metal, .006” press
Valve Seat dim. Int - 2.160x 1.810 x .350 ex - 1.650x 1.350x .350
Valve Seat angles: Int = 32°- 45°- 60°- 70°- 80° Ex = 37°- 45°- radius
Stud Girdle: Jomar Performance #1123
Torque: 1/2" = 100 ft/lb
Rocker Studs = 45 ft/lb Manifold = 18 ft /lb
Block Use: Dart Iron or Aluminum & any Ford
Weight: 26 lbs assembled
* Photo for illustration purposes only