WR 290 Chevy BB Heads 1 Par kompletta

Beskrivning

WR BBC 290cc toppar specifications

Specifications & Features:
Material A356.2 Aluminum
Intake Port Volume 290cc
Intake seat size 2.25 OR 2.30
Exhaust seat size 1,88
Intake Port Dimension 2.030″H x 1.830″W x1/2 Radius
Intake Port Location Stock
Exhaust Port Volume 135cc
Exhaust Port Dimension 1.770″H x 2.010″ W
Exhaust Port Location .375″ Raised
Combustion Chamber Size 112cc
Valve Cover Bolt Pattern Perimeter Bolt
Valve Angle 24°/4° Int, 15°/4° Exh
Valve Spring Pocket Diameter 1.725″ O.D
Max Valve Spring Pocket Machining 1.750″ O.D
Deck Thickness .750″
Minimum Bore Diameter 4.250″
Flat Mill .006″ per cc/ Maximum 102cc
Angle Mill .009″ per cc/ Maximum 97cc
Note:Angle mills might require a .120″ Thick intake gasket.

Ventilfjädrar för hydroller med Retainers 10*

Flödes Värden Utfört @ 28 ” vatten på vår FlowLab 520 Borr 4,230

Minimum Cross Sectional Area 2.895 sq. in.
Spark Plug Dimensions 14mm x .750″ w/Gasket Seat.

Rekommenderade komponeter som kan köpas till:
11/32″ Intake Valve, 2.250″ x 5.500″ O.A.L
11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450″ Overall Valve Length
Racing Springs#1940 1.550″ O.D. Hydraulic Roller Dual Valve Spring, 175 lbs. on seat,
.725″ maximum lift, 473lbs @ .600 lift, Max RPM 6500-6700
Racing Spring 1.550 O.D. Solid Roller Valve Spring, 220lbs on seat, .710″ Maximum
Lift, Max RPM 7200-7400 (upgrades available)
Manley 10° Steel Retainers 1.500″ O.D x 1.120″I.D x .705″ I.D
10° 11/32″ Valve Locks with lashcap recess
ARP 7/16″ Rocker Exhaust Studs
ARP 7/16″ Rocker Intake Studs
3/8″ Guide Plates
11/32″ Viton Valve Seals
Hardened Valve Spring I.D Locator 1.550″ O.D x .780″ I.D
Intake Valve Seats 2.450″ O.D x 1.950″ I.D x .375″ Deep
Exhaust Valve Seats 2.000″ O.D x 1.580″ I.D x .375″ Deep
11/32″ Intake Bronze Valve Guides .502″ O.D x 2.10″ O.A.L
11/32″ Exhaust Bronze Valve Guides .502″ O.D x 2.25″ O.A.L
Recommended Components:
Intake Port Gasket
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.
Exhaust Port Gasket
Head Gasket, Fel-Pro #1047 (Mark V and VI)
Head Gasket,, Fel-Pro #1017-1 (Mark IV)
Head Bolts, ARP 135-3703 (Mark IV)
Head Bolts, ARP 135-3707 (Mark V)
Head Studs, ARP 235-4713
Head Bolt Washers, Manley
Stud Girdle
7/16 Stud Mount Rocker Arms – 1.7 Ratio (For Optimized Geometry)
1.7 Shaft Mount Rocker Arms T&D
Suggested Manifold Victor Jr
Suggested Manifold RPM Performer

Spark Plug Starting Range Autolite 3924