Assembled Solid Roller PAIR SBC Small Block Chevy CNC ported Cylinder heads DRP 23 deg 64cc Angle

PAIR SBC 225 CNC Cylinder heads Assembled Race Solid Roller 23Â° 64cc Alloy Angle Plug - Small Block Chevy

Description

DRP Small Block Chevy 350 CNC Ported Cylinder Heads. Suits Race Solid Roller combinations. Sold as a Pair, with as Cast Chambers.

Assembled & suitable for Race Solid Roller, max 7500 RPM & .660" lift.

Utilising Comp Cams Race/Endurance Valve Springs & Ferrea 6000 Series Valves.

DETROIT RACING PRODUCTS Cylinder heads.

Chev 23 Degree DRP Aluminium Cylinder heads

DRP’s Small Block Chevy cylinder heads offer a cylinder head with improved port and combustion chamber designs that result in “Bolt on Horsepower”!

Cylinder Heads play such a critical role in your engine and performance cylinder heads usually come at a significant cost. The DRP range of Cylinder heads are easy on the budget while delivering on performance, precision and quality. The DRP “as-cast” ports and chambers perform out of the box. These CNC versions are an improvement on the As Cast versions.

DRP have not CNC machined the combustion chambers, because they dont have to. The Chambers are perfect as cast! An added benefit is the combustion chamber stays small, maintaining compression.

DRP CNC Chevy 350 Cylinder Heads Specifications:

CNC Ported -
Intake Port Volume: 228 cnc
Valves: Ferrea 6000 Series
Intake Valve Diameter: 2.020"
Exhaust Valve Diameter: 1.600"
Valve Springs: DRP Proline by PAC Racing
- Installed rate: 250lbs@ 1.800"
- Valve Spring Rate: 500 lbs/inch
- Max Lift: 0.660" Lift with .060 safety included
- Small OD LS Style
Retainers: Tool Steel Comp Cams & Comp Cams machined race locks

Angle Spark Plug
CNC Port Shape, High Torque inlet runners that flow 573hp @ .600" lift
228cc Intake runner volume (CNC Ported)
88cc Exhaust (CNC Ported)
64cc Chamber size (As Cast) (these heads can be milled down to 60cc)
Crisp throttle response.
Internal Cast Quality + Thick ( Super Smooth Water Jackets for maximum flow - see our photos of the internal casting)
Optimal Spark Plug position. The copies dont have this location.
Premium Bronze Valve Guides. 0.570" OD
Use Valve Stem Steals: Comp Viton: 518-16 Teflon: 503-16
Seal Size 0.530" x 11/32
Hard 355-T6 Aluminium - Race Quality.
3 Angle Valve Seats - CNC machined
Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES
Recommended Intake Gaskets: Felpro 1205 std Port or Felpro 1206 for Ported
Recommended Guide Plates: Comp Cams 4835-8 / DRP-4835-GP
Intake valve seat can be cut to accomodate a 2.080" Valve diameter.

These heads flow HP all with a 2.02" diameter valve. (can be taken out to 2.080" valve)

593hp @ 0.700" lift

573hp @ 0.600" lift

553hp @ 0.500" lift

Flow Figures*:

Lift Intake Exhaust

200 141 98

300 197 126

400 241 154

450 259 165

500 269 174 553hp

550 272 182

600 278 188 573hp

650 284 192

700 288 197 593hp

* Flown on a Superflow 600 with a 4.030" Bore and a 30° back cut to the intake valve. No pipe on the exhaust.

*Output will be determined by your combination and quality of the motor build.

We can assemble using Ferrea Valves and Comp Cams Hardware.

Have confidence and pride these are quality items Hand Assembled right here in Melbourne Australia.

Exceptional Quality for a Wow factor of a price!

*See the photo of the internal cast quality. We cut a cylinder head in half to verify the thickness and quality. These castings are exceptional quality.

These Cylinder heads flow and work like you wont believe. Best Bang for your Buck!

Dont waste your time or money on rebuilding old Cast Iron units - upgrade now. Forget the headaches, poor valve seats and crack testing woes.

We do offer Complete assemblies, valves, springs, retainers to suit your application, see our other listings for various assemblies to suit your camshaft. We use Ferrea Valves, DRP Stainless Steel Valves and Comp Cams hardware.