Page 61 - Diamond Pistons

Big Block Chevy
8.1L MARINE SERIES
• 3D milling on piston crowns for ready to install nish
• Designed as a direct replacement for 8.1L GM marine engines
• Top ring down dimension: .220”
• Standard 1/16 x 1/16 x 3/16 ring package
• Premium 8620 .155W wrist pins included
• Valve pocket depth: 0.107” intake and .000” exhaust
• Will work with up to a intake valve size of 2.470” and exhaust valve size of 1.880”
• Made from 4032 alloy
Optional H-13, M2 and TP-1 wrist pins available as a upgrade to any piston part number - Contact Diamond Pistons for tech assistance
454 MARINE DOME SERIES
• 3D milling on piston crowns for ready to install nish
• Designed as a direct replacement for speed pro part number 693CP
• Top ring down dimension: .280”
• Ratios gured for .040 head gasket @ 9.800 Deck & 10.200 Deck
• Standard 1/16 x 1/16 x 3/16 ring package
• Premium 8620 .185W wrist pins included
• Valve pocket depth: 0.277” intake and -.145” exhaust
• Made from 4032 alloy
All items in red are non-stocking parts, made-to-order as necessary
Optional H-13, M2 and TP-1 wrist pins available as a upgrade to any piston part number - Contact Diamond Pistons for tech assistance
8.1L Block 10.235 Deck Height: 4.255 Std Bore - 4.370 Std Stroke
COMPRESSION RATIO
Bore
Stroke
Rod
C.D.
Weight
Pin
CC's
Factory CC
Ring Set
Part #
4.255
4.370
6.693
1.363
515
1.040 x 2.930
-2.6cc
Factory Replacement
09024250
12705
Big Block Chevy
454 Block 9.800 Deck Height: 4.250 Std Bore 4.000 Std Stroke
COMPRESSION RATIO
Bore
Stroke
Rod
C.D.
Weight
Pin
CC's
98cc
110cc
118cc
Ring Set
Part #
4.270
4.000
6.135
1.655
632
.990 x 2.930
22.0cc
11.5
10.3
9.6
09024270
12707
4.280
4.000
6.135
1.655
635
.990 x 2.930
22.0cc
11.5
10.3
9.6
09024280
12704
4.310
4.000
6.135
1.655
649
.990 x 2.930
22.0cc
11.7
10.4
9.7
09024310
12706
DiamondRacing.net Tech support 586.792.6620
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DOMESTIC SERIES