DRP PAIR SBC Small Block Chevy Cylinder heads by DRP 196cc 23Â° 64cc Alloy Angle Plug BARE

SBC Small Block Chevy Cylinder heads 196cc 23° 64cc Alloy Angle Plug Bare Pair

Description

DETROIT RACING PRODUCTS Cylinder heads.

Sold as a BARE pair.

Chev 23° DRP-200A Aluminium Cylinder heads
Angle Spark Plug - fits Ram Horn manifolds - see photo.
High Torque inlet runners that flow 500hp @ .450" lift
196cc Intake runner volume + 75cc Exhaust
64cc Chamber size (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
Guide Seal Size 0.530" x 11/32
Hard 355-T6 Aluminium - Race Quality.
3 Angle Valve Seats
Intake Valve size: 2.02"
Exhaust Valve size: 1.60"
Recommended Spark Plugs: 750 reach gasketed 5/8 hex. NGK-BCPR7ES
Recommended Intake Gaskets: Felpro 1205 std Port or Felpro 1206 for Ported
Recommended Adjustable Guide Plates: Comp Cams 4835-8 & DRP-4835-8
Valves needed: Intake: 2.020" x 5.011" Long x 11/32" stem.
Valves needed: Exhaust: 1.600" x 5.011" long x 11/32" Stem.
Intake Valves: Ferrea F5027-8 & DRP-5027-8
Exhaust Valves: Ferrea F5025-8 & DRP-5025-8
Temp Sender Size: 3/8" NPT

These heads flow 500hp @ 0.450" lift

Flow Figures*:

Lift Intake Exhaust

200 145 106

300 192 135

400 232 160

450 242 168

500 242 178

550 242 179

600 244 181

650 244 187

700 245 190

* Flown on a Superflow 600 with a 4.030" Bore and a 30° back cut to the intake valve.

We have dyno run these heads (out of the box) on a 350 Chev, 750dp carb, Edelbrock VJ, Long tube headers, our custom solid flat tappet Cam in the 250° range and produced an excellent 500HP and 470ft/lbs of Torque! Watch our post on facebook OR Youtube and see the Dyno Sheet in the photos.

350 CHEV DYNO RUN - 500HP https://www.youtube.com/watch?v=vpwIgJIN5X8

383 CHEV DYNO RUN - LOW COMP 95 OCTANE https://www.youtube.com/watch?v=iAEie9M4fz8

*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 have 4 Stages - 1 through to 4. We use Stainless Steel Valves and Comp Cams hardware.