Isky ISK201025 Solid Flat Tappet Camshaft Chev SB 265-400 240 In/240 Ex @.50

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Isky Racing Cams

ISK201025
$323.60 AUD
$323.60 AUD
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Isky ISK201025 Solid Flat Tappet Camshaft Chev SB 265-400 240 In/240 Ex @.50

Item Description

ISKY SOLID FLAT TAPPET CAMSHAFT CHEV SB 265-400 240 IN/240 EX @.50 ISK201025These Hi-Rev series solid flat tappet cams from Isky are manufactured from the finest high-quality proferal cast iron billets. They are extremely popular for high performance dual-purpose and competition engines. These cams provide excellent horsepower and revving ability, while using relatively low valve spring pressure, thus ensuring long cam and lifter life.Specs:
Application: Chev Small Block Gen I 265-400 C.I.D
Cam Style Mechanical flat tappet
Basic Operating RPM Range 2,500-6,500
Intake Duration at 050 inch Lift 240
Exhaust Duration at 050 inch Lift 240
Duration at 050 inch Lift 240 int./240 exh.
Advertised Intake Duration 278
Advertised Exhaust Duration 278
Advertised Duration 278 int./278 exh.
Intake Valve Lift with Factory Rocker Arm Ratio 0.480 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio 0.480 in.
Valve Lift with Factory Rocker Arm Ratio 0.480 int./0.480 exh.
Lobe Separation (degrees) 108
Intake Valve Lash 0.018 in.
Exhaust Valve Lash 0.018 in.
Computer-Controlled Compatible No
Grind Number Z-25
Valve Springs Required Yes
Camshaft Manufacturers Description Strong midrange performance. Lopey idle. 2,500 rpm stall. 3.70-4.11 axle ratio. 650-750 cfm carb. 10.5:1 compression.
Quantity Sold individually.

TIMING CHART

PART NUMBER: 201025 GRIND NUMBER: z-25
ENGINE INFO: CHEVY SMALL BLOCK V8 265-283-302-305-307-327-350-400 CU.INCHES APPLICATION:
SPECIAL REMARKS: SOLID PRODUCT USE: STREET
RPM RANGE: 2500-6500
Valve lift is calculated with zero lash and rocker ratio of 1.5
INTAKE TIMING
DURATION: 278 deg.
OPEN: 31 BEFORE TDC
CLOSE: 67 AFTER BDC
CAM LIF .320"
VALVE LIF .480"
VALVE LASH: .018 HOT
.02 COLD
EXHAUST TIMING
DURATION: 278 deg.
OPEN: 67 BEFORE BDC
CLOSE: 31 AFTER TDC
CAM LIF .320"
VALVE LIF .480"
VALVE LASH: .018 HOT
.02 COLD

LOBE CENTER: 108 deg. OVERLAP: 62 deg. CAM ADVANCE: 0 deg.
THE ABOVE TIMING IS CHECKED AT .020 (OPEN) LIFTER RISE
.020 (CLOSE)
The following timing is taken at .050" lifter rise and gives a more accurate determination of camshaft position.
INTAKE
DURATION: 240 deg.
OPEN: 12 BEFORE TDC
CLOSE: 48 AFTER BDC
EXHAUST
DURATION: 240 deg.
OPEN: 48 BEFORE BDC
CLOSE: 12 AFTER TDC

RECOMMENDED ISKY CAM KIT PARTS AND SETUP INFORMATION

LIFTERS: 202-H LIFTER TYPE: SOLID
SPRING: 205-D TYPE: SINGLE W/DAMPER DIA.: 1.250" RATE: 310 lbs per inch
INSTALLED HEIGH 1.700" SEAT PRESSURE: 115 lbs OPEN PRESSURE: 268 lbs
COIL BIND: 1.160"
SPRING SHIMS: # 4
STEEL RETAINERS: 707-ST
TITANIUM RETAINERS:
PUSHRODS: 203-HG TYPE: NON-ADJ HEAT TREATED LENGTH: 7.781" DIA.: 5/16"
ROCKER ARMS: 204 TYPE: ROLLER RATIO: 1.5
VALVE LOCKS: VL-32
VALVE LOCKS: VL-32
REV KI




Manufacturer Information

  • Manufacturer: Isky Racing Cams
  • Manufacturer Part Number:
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