Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
CHAMPIONSHIP ENGINE COMPONENTS<br />
MADE IN THE USA<br />
SHORT BLOCKS TOP KITS BLOCKS HEADS MANIFOLDS CRANKSHAFT ACCESS SBC LS BBC SBF HON COATINGS BILLET<br />
QUICK INFO >>><br />
Mercury Racing 525 replacement style heads.<br />
Three intake runner sizes offer potential for<br />
increased levels of performance.<br />
We’ve retooled Dart’s PRO1 BBC castings<br />
to produce a true bolt on upgrade for the<br />
Mercury Racing 525 engine. The PRO1 24°<br />
525 MMR is available with 310cc, 325cc or<br />
345cc intake runners and has the correct<br />
exhaust bolt pattern for the factory manifolds.<br />
A grey chromate surface treatment<br />
inhibits salt corrosion for marine usage.<br />
Heads are sold individually.<br />
DART MARINE PRO1 CYLINDER HEADS<br />
24°<br />
525 MMR<br />
310/325/345cc<br />
Features an exclusive Teflon© surface finish to<br />
inhibit corrosion and extend the life of the head.<br />
Fitted with Inconel exhaust valves to withstand<br />
the extended running time and temperatures<br />
typical of marine usage.<br />
PRO1 24° 310cc MERC STYLE - ALUMINUM (w/ 2.250” Intake Valve)<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
19100010MMR Bare Head<br />
19100112MMR 1.550” Dual Springs for Hydraulic Roller Cam .660”<br />
PRO1 24° 325cc MERC STYLE - ALUMINUM (w/ 2.250” Intake Valve)<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
19200010MMR Bare Head<br />
19200112MMR 1.550” Dual Springs for Hydraulic Roller Cam .660”<br />
PRO1 24° 325cc MERC STYLE - ALUMINUM (w/ 2.300” Intake Valve)<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
19200030MMR Bare Head<br />
19200132MMR 1.550” Dual Springs for Hydraulic Roller Cam .660”<br />
PRO1 24° 345cc MERC STYLE - ALUMINUM (w/ 2.300” Intake Valve)<br />
PART NO. CONFIGURATION FOR USE MAX. LIFT<br />
19300030MMR Bare Head<br />
19300132MMR 1.550” Dual Springs for Hydraulic Roller Cam .660”<br />
BIG BLOCK CHEVY<br />
CAST ALUMINUM CYLINDER HEADS<br />
Head parts kit - see page 118.<br />
Uses +.250” long intake valves.<br />
RECOMMENDED MANIFOLDS<br />
FOR 9.800” DECK BLOCKS<br />
41114000 Single Plane 4150<br />
41124000 Single Plane 4500<br />
PRO1 24° 310cc MERC STYLE SPECS<br />
Material:<br />
RMR Cast<br />
Aluminum Alloy<br />
Valve Angle: 24°<br />
Intake Port Volume: 310/325/345cc<br />
Intake Valve: 2.250”/2.300”<br />
Exhaust Valve: 1.880”<br />
Chamber Volume: 121cc<br />
Intake Port Shape: Rectangle<br />
Exhaust Port Location: .300” raised<br />
310cc FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 167 127<br />
.300” 250 170<br />
.400” 302 211<br />
.500” 333 244<br />
.600” 352 267<br />
.700” 360 282<br />
.800” 363 294<br />
325cc FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 166 127<br />
.300” 245 170<br />
.400” 297 211<br />
.500” 330 244<br />
.600” 355 267<br />
.700” 370 282<br />
.800” 377 294<br />
345cc FLOW DATA @ 28” WATER<br />
LIFT INTAKE EXHAUST<br />
.200” 165 127<br />
.300” 244 170<br />
.400” 308 211<br />
.500” 355 244<br />
.600” 378 267<br />
.700” 396 282<br />
.800” 399 294<br />
Not intended for sale or use with pollution controlled vehicles.<br />
80<br />
248.362.1188 / DARTHEADS.COM Connect with us socially, search: DART MACHINERY
Change language