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505 Big Block Chevy Motor - Big-Block Street Heat

Here's 700 Horses And 650-Plus Lbs-Ft From A 505-Inch, Pump Gas Big-Block Chevy That We Closely Watched Costs On.

RHS big-block Chevy 320 head flow tests.

LIFT BAD IN GOOD IN EXHAUST
100 77.1 77.1 62.1
200 161.3 161.7 125.8A
300 228.7 231.1 162.4
400 291.8 295.7 195.6
500 346.1 350.9 222.7
600 375.0 382.7 245.9
700 371.1 383.7 264.4

Here are the "as cast" numbers for the RHS heads.

LIFT BAD IN GOOD IN EXHAUST
1100 78.8 78.9 68.8
200 162.2 163.2 132.5
300 234.5 235.5 179.1
400 298.9 302.1 215.2
500 350.9 356.2 243.8
600 387.3 393.3 268.2
700 401.1 404.9 286.2

Even as cast there is enough airflow From the RHS 320 heads for 700 hp on a 540-inch engine. When simple porting techniques (that is no more complex than a near beginner might do over a couple of week ends at home) are applied the numbers look even better. The figures achieved with the T&L ported heads are as below.

SOURCES
AED Carburettors Racing Head Service
9-01/-259-1134
www.racingheadservice.com
Competition Cams
Memphis
TN
8-00/-999-0853
compcams.com
Ross Racing Pistons
625 S. Douglas Ave.
El Segundo
CA  90245
310-536-0100
Moroso Performance Products Inc. Scat Enterprises Inc.
1400 Kingsdale Avenue,
Dept. MMFF
Redondo Beach
CA  90278
Professional Products
Hawthorne
CA
3-23/-779-2020
professional-products.com
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