SKU: DRP-BBC340-HFT

PAIR ASSEMBLED BBC CHEVY ALUMINIUM CYLINDER HEADS 335cc / 118cc HYDRAULIC FLAT TAPPET - CHEVY BIG BLOCK

Assembled for Hydraulic Flat Tappet

$2,743.76

SOLD OUT

Description

 

DRP DETROIT RACING PRODUCTS

BBC Chevy Big Block Aluminum Performance Cylinder Heads - Sold as a PAIR.

Hand Assembled using DRP Valves and Comp Cams hardware. 

  • Premium Bronze Valve Guides.
  • Hard 355-T6 Aluminium - Race Quality.
  • 3 Angle Valve Seats
  • Intake Valve size: 2.250"  X 11/32"    (Recommend 5.370" length)
  • Exhaust Valve size: 1.880" X 11/32"  (Recommend 5.320" length)
  • Combustion chamber size: 118cc
  • Intake Port Volume: 335cc
  • Intake Port Dimensions:   1.780" W x 2.500" H
  • Intake Port Location    Stock
  • Exhaust Port Volume: 148cc
  • Exhaust Port Dimension:  1.900" W x 1.660" H
  • Exhaust Port Location  .357" Raised
  • Valve Angle            24°/4° Int, 15°/4° Exh
  • Valve Spring Pocket Diameter   1.750"
  • Minimum Bore Diameter          4.550" 
  • Flat Mill               .006" per cc/ Maximum 105cc As Cast
  • Angle Mill           .009" per cc/Maximum 100cc As Cast
  • Valve Spring Installed heights: 
    • ​Intake with 5.370" long & 0.250" tip = 1.900" installed height
    • Exhaust with 5.320" long & 0.250 tip = 1.900" installed height
  • Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES
  • Recommended Intake Gaskets: Felpro 1275 (larger) or Felpro 1252-3 
  • Recommended Head Bolts:
    • BOLTS:  ARP-135-3603      6 POINT
    • BOLTS:  ARP-135-3703    12 POINT
  • Intake Valves to suit: 
  • Exhaust Valves to suit:  "DRP-BBC1880-5.350EXV-8"
  • Springs: Comp Cams - 10 Deg retainers
    • 115 lbs seat
    • 305 lbs open @ 0.550" lift
    • Max lift: 0.660"  (with 060 to coil bind)

Does not include: Rocker Studs & Guide Plates.

Rocker Studs - we recommend

  • DRP-100-7101 
  • ARP-100-7101

Guide Plates - we recommend Comp Cams

  • 4806-8      3/8" Pushrod
  • 4820-8     7/16" Pushrod

FLOW FIGURES

HEADS   DRP-BBC 340 335cc    
             
CFM Flow @ 28 (inHg) on a 4.310" Bore (454 + 060")*
             
LIFT   INTAKE   EXHAUST    
0.100"   78   73    
0.200"   142   130    
0.300"   210   172    
0.400"   270   208    
0.450"   300   223    
0.500"   310   233    
0.550"   322   241    
0.600"   331   248    
0.650"   337   255    
0.700"   345   263    
0.750"   346   265    
             
*Flowed at Total Performance Vic 7th April 2020  
             

 

 

Specifications

SKU DRP-BBC340-HFT
Brand DRP

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