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 |
