AP Racing Catalogue Issue 4

108 visit www.apracing.com for installation drawings & up to date product range details METALLIC RACE CLUTCH - Ø184mm - ‘I’Drive Cushion Cover CP8372 & CP8742 CP8732. Ø184mm, ‘DB’ Dual Banded, ‘I’ Drive, 2 Plate, Paddle APPLICATIONS ◘ WRC / ◘ Touring Car. FEATURES ◘ New patented ‘DB’ Dual Banded cover design geometry - offers significant reduction in weight, and increased stiffness, compared to conventional clutches. ◘ Benefits from a new drive system, featuring drive tenons, which locate into internal jaws of the lugs - five times more durable than conventional clutch design, when subjected to the same test parameters, and eradicates distorting of pressure plates trapping on lugs. ◘ 2 Plate, push type. ◘ Stepped flywheel fixing - Inner diameter location. ◘ 12 bolt, one piece forged cover and lugs. ◘ Driven plate thickness - new = 6.00mm. ◘ Innovative wear plate design fitted - combats wear on the drive lugs. ◘ CP4703 mounting studs available. PART NUMBERS ◘ Standard assembly - CP8732-OH81-SF. ◘ Clutch assembly available with optional cushioning in cover - CP8732-OH81-SR. ◘ Download latest issue installation drawing from : www.apracing.com CP8742 - Ø184mm, Heavy Duty, 12 Bolt ‘I’ Drive - 2 Plate, Paddle TECHNICAL SPECIFICATIONS - CP8732-OH81-SF Torque Capacity 475Nm (350lbft) Release Loads Max peak worn 415daN At travel 295daN Set-up Height (New) 31.90 / 30.10mm Set-up Height (Worn) 37.45mm Clutch “Wear In” 1.75mm Release Ratio 3.08 Estimated Weight (no driven plates) Standard clutch assembly 1.86Kg Cushion clutch assembly 1.94Kg Estimated Assembly Inertia Standard clutch assembly 0.01180Kgm² Cushion clutch assembly 0.01211Kgm ² Estimated Driven Plate & Hub Inertia 0.003567Kgm² Recommended Release Bearings. Outer race rotates CP3457-2 Inner race rotates CP3457-6 DRIVEN PLATES Thickness New = 6.00mm Worn = 5.10mm D/Plate Types Part Number Spline Details Bonded 4 Paddle, Back to back CP8401-A036H x 1 1.00” x 23 CP8401-G036H x 1 Other splines available, see page 116 Note: Clutch supplied less driven plates, order separately SPARE PARTS Wear Plates x 12 CP8493-109 Main Pressure Plate CP8752-101 Intermediate Pressure Plates CP8042-102 TECHNICAL SPECIFICATIONS Torque Capacity CP8742-CH81-SF 559Nm (411lbft) CP8742-TH81-SF 735Nm (542lbft) Release Loads Max peak new Max peak worn CP8742-CH81-SF 445daN 375daN CP8742-TH81-SF 550daN 435daN Set-up Height (New) CP8742-CH81-SF 31.92 / 29.97mm CP8742-TH81-SF 31.71 / 29.98mm Set-up Height (Worn) CP8742-CH81-SF 36.68mm CP8742-TH81-SF 37.50mm Release Ratio 3.30 Clutch “Wear In” 1.50mm Weight (No driven plates) 2.29Kg Complete Assy Inertia 0.0480Kgm² Driven Plate & Hub Inertia 0.003567Kgm² Recommended Release Bearings Outer race rotates CP3457-1 Inner race rotates CP3457-11 DRIVEN PLATES Thickness New = 6.00mm Worn = 5.23mm D/Plate Types Part Number Spline Details Bonded 3 Paddle, Back to back CP8301-A036H x 2 1.00” x 23 CP8301-A029H x 2 7/8” x 20 Bonded 4 Paddle, Back to back CP8401-A036H x 2 1.00” x 23 Bonded 6 Paddle, Back to back CP8601-A036H x 2 1.00” x 23 4 Paddle Nested CP8405-A036H x 2 1.00” x 23 Alternative Nested, 4 Paddle CP8172-10FM4 x 1 Flywheel side 1.00” x 23 CP8172-11FM4 x 1 Cover side Other splines available, see page 116 Note: Clutch supplied less driven plates, order separately SPARE PARTS Main Pressure Plate CP8742-105 Intermediate Pressure Plate CP8022-102 APPLICATIONS ◘ WRC / ◘ R5 / ◘ Touring Car. NOTE: Alternative cushion cover assembly available, CP8812 Family, suitable for high torque launches, i.e rear wheel driven cars. FEATURES ◘ Heavy Duty version of CP8022 family - Special high temperature diaphragm spring. ◘ Assymetric designed cover - offers 10% reduction in weight, and increased stiffness. ◘ Benefits from a new drive system, featuring drive tenons, which locate into internal jaws of the lugs - five times more durable than conventional clutch design, when subjected to the same test parameters, and eradicates distorting of pressure plates trapping on lugs. ◘ 2 Plate, push type. ◘ Stepped flywheel fixing standard - Inner diameter location / Flat flywheel also available - Outer diameter location. ◘ 12 bolt, one piece forged cover and lugs. ◘ Innovative wear plate design fitted - combats wear on the drive lugs. ◘ CP4703 mounting studs available. PART NUMBERS CP8742-CH81-SF / CP8742-TH81-SF. ◘ Download latest issue installation drawing from : www.apracing.com