The RACER PRO aluminium 23 degree head was designed for racers making the move from the old style heavy cast iron heads to the lightweight high flow alloy head.

RACER PRO aluminium head also has the advantage of being able to use many of your existing parts (valves, rockers, pistons, inlet & exhaust manifolds). RACER PRO 23 degree heads also take advantage of higher flowing 40/60 valve spacing. Suitable on engines 330-400 cu inch. Heads can be supplied as an assembled package using brand name components.

 

  • Combustion Chamber - 68cc can be flat milled or angle milled
  • Intake Port Volume - 215CC
  • Intake Port Dimensions - Felpro 1206
  • Intake Valve Size - 2.080" x 4.960 long
  • Exhaust Valve Size - 1.620" x 4.960 long
  • Head Gasket - Felpro Cometic
  • Head Bolts / Studs - Standard Chev
  • Spark Plugs - 14 Mm ¾ Reach Gasketed
  • Spring Seats - 1.550" May Be Cut To 1.650" No Bigger .040" Deeper Max
  • Valve Spacing - 40/60 inlet moved away from cylinder wall 040" exhaust moved away from inlet .060"
  • Guide Plates - Offset
  • Rocker Arms - Stud type standard. Shaft type special order
  • Most Common Intake Manifold - Edelbrock Pn
  • Stud Girdle - RACER PRO
  • Horse Power Range - 500 - 580

RACER PRO 23 degree flow chart 210cc port

Flowed @ 28" Moderate porting 2.05" inlet 1.62" exh valve

LIFT 100 200 300 400 500 550 600 650 700 750
INLET cfm 70 138 183 240 275 278 280 284 285
EXHAUST cfm 54 111 160 208 224 225 234 235 238

 

RACER PRO 23 degree flow chart 200cc port

Flowed @ 28" Moderate porting 2.05" inlet 1.62" exh valve

LIFT 100 200 300 400 500 550 600 650 700 750
INLET cfm 90 152 210 255 267 267 275 273
EXHAUST cfm 54 111 160 208 224 225 234 235

 

 

 

Racer Pro produces alloy castings for some of Australia's leading after market performance manufacturers, including cylinder heads for Chev, Holden and Ford, alloy cylinder blocks for 4-cyl, 6-cyl and V8's. Inlet manifolds for Chev, Holden and Ford. Valve covers, superchargers, turbo charger manifolds etc.

You name it and we probably have cast it!