The RACER PRO raised inlet aluminium 23 degree head was designed for racers looking for more power without the added cost of building a new motor.

The RACER PRO RI head uses the same components as a standard 23 degree head (pistons, rockers, inlet and exhaust manifolds). But because inlet ports have been raised .200" much higher flow figures can be achieved. The RACER PRO RI Head also takes advantage of the higher flowing 40/60 valve spacing. Suitable on engines 330 - 430 cu inch. RACER PRO heads can be supplied CNC ported in a number of port sizes to suit your application. RACER PRO RI heads can be ordered with no pushrod slots to suit offset rocker arms. A longer valve must used with this head.

 

  • Combustion Chamber - 68cc can be flat milled or angle milled
  • Intake Port Volume - 220cc plus
  • Intake Port Dimensions - Felpro 1206
  • Intake Valve Size - 2.080" - 2.100" X 5.160" Long
  • Exhaust Valve Size - 1.620" - 1.620" X 5.160" Long
  • Head Gasket - Felpro Cometic
  • Head Bolts / Studs - Standard Chev Arp
  • Spark Plugs - 14 Mm ¾ Reach Gasketed
  • Spring Seats - 1.550" may be cut to 1.650" no bigger .040" deeper no more
  • Valve Spacing - .040/.060
  • Guide Plates - Offset
  • Rocker Arms - Stud type: standard. Shaft type: T&D Part Number 2216 .450" Offset
  • Stud Girdle - RACER PRO
  • Most Common Intake Manifold - Edelbrock Pn
  • Horse Power Range - 550 - 630

 

RACER PRO 23 degree RI flow chart

Flowed @ 28" Moderate porting 220cc port 2.080" valve 4.125 bore.

LIFT 100 200 300 400 500 550 600 650 700 750
INLET cfm 68.1 149.7 210.6 245.2 278.5 294.7 305.7 313.3 316.3
EXHAUST cfm 58.8 111.5 160.8 208.4 224.2 229.6 234.7 238.9 242.2

RACER PRO 23 degree RI flow chart

Flowed @ 28" Maximum porting 236cc port 2.1" valve 4.125 bore.

LIFT 100 200 300 400 500 550 600 650 700 750
INLET cfm 74.5 141.5 199 252.5 296 305 320 329 333 338
EXHAUST cfm 54 112 190 223 234 236 237 241 244 247

 

 

Price: AUD $1500 inc. GST + frieght

 

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!