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QUALITY STRENGTH PERFORMANCE SINCE 1981<br />
QUICK INFO >>><br />
Excellent street, strip, oval track and truck or<br />
marine performance upgrade. Maximum torque and<br />
throttle response from 3,000 to 7,000+ RPM. Best<br />
for 347-427 cubic inch engines. Works with most<br />
standard components.<br />
<strong>Dart</strong> PRO1 20° 210cc CNC heads for Ford small<br />
blocks are professional quality competition<br />
cylinder heads. We applied the airflow technology<br />
developed in our championship winning<br />
Pro Stock engine program to produce these<br />
state of the art heads.<br />
Exhaust runners are raised .135” for improved<br />
flow. Manganese Bronze valve guides are used<br />
for long life, and hardened valve seats provide<br />
durability with unleaded fuels. Features 2.500"<br />
and 3.000" exhaust bolt pattern.<br />
Assemblies include Stainless Steel valves,<br />
premium springs, locks, retainers, studs, guide<br />
plates and seals.<br />
Heads are sold individually.<br />
20°<br />
210cc<br />
CNC<br />
PRO1 20° 210cc CNC - ALUMINUM<br />
62cc COMBUSTION CHAMBERS<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
13071020 Bare Head<br />
13071122 1.437” Dual Springs for Hydraulic Roller or Solid Flat Tappet Cam .620”<br />
13071123 1.550” Dual Springs for Solid Roller Cam .700”<br />
SMALL BLOCK FORD<br />
CAST ALUMINUM CYLINDER HEADS<br />
Head parts kit - see page 118.<br />
Uses 7/16” screw-in rocker studs.<br />
Assemblies with 1.550” valve spring<br />
use +.100” long valves.<br />
PRO1 20° 210cc CNC SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Valve Angle: 20° (stock)<br />
Intake Port Volume: 210cc CNC<br />
Intake Valve: 2.050”<br />
Exhaust Valve: 1.600”<br />
Chamber Volume: 62cc<br />
FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 132 108<br />
.300” 195 151<br />
.400” 252 187<br />
.500” 287 203<br />
.600” 305 208<br />
.700” 304 212<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
Not intended for sale or use with pollution controlled vehicles.<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY<br />
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