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Pontiac V-8 Crate Engines - Pontiac Tech
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| BOTTOM END |
| Block: |
New factory item PN 12551360 |
| Year: |
2010 |
| Preparation: |
Standard OEM production procedures |
| Deck Height: |
9.24-in |
| Crank: |
New GM nodular-iron, rolled fillets, 2.75-in |
| mains, 3.66-in stroke |
| Preparation: |
Standard OEM production procedures |
| Balancer: |
GM PN 12576652 |
| Rods: |
GM powdered-metal steel, 6.098-in |
| Bearings: |
GM production |
| Pistons: |
Stock GM hypereutectic with Grafal |
| anti-friction coating |
| Piston to Deck Height: |
Zero |
| Piston Pins: |
GM steel, 0.949-in |
| Method Used to Retain Pins in Pistons: |
Press-fit |
| Rings: |
GM moly-coated steel top, cast-iron second, |
| oil control-expander-type with support rails |
| Rod Bolts/Head Bolts: |
GM metric torque-to yield |
| Balancing Specs: |
N/A |
| OILING SYSTEM |
| Windage Tray: |
None |
| Crank Scraper: |
None |
| Oil Pan: |
Cast 356-T6 structural design, |
| GM 6-quart with filter |
| Oil Pump: |
GM geroter-style, driven off front of crank, |
| 24 psi minimum at 4,000 rpm, 60-psi pressure relief at 5,000 rpm |
| HEADS |
| Casting number: |
706, 356-T6 aluminum |
| Chamber: |
Open |
| Head Mods: |
OEM stock |
| Combustion Chamber Volume: |
61cc Maximum flow at 28 inches of pressure |
| Intake: |
226 cfm at 0.600-in lift |
| Exhaust: |
174 cfm at 0.600-in lift |
| Compression Ratio: |
9.5:1 |
| Valves: |
GM 1.89/1.55-in |
| Angles Used in Valve Job: |
30,45,60-deg |
| Retainers: |
Steel 10-deg |
| Keepers: |
Steel 10-deg |
| Valveguides: |
GM pressed sintered iron |
| Valve Seals: |
GM production |
| Rocker Studs: |
GM |
| Rocker Arms: |
GM investment cast-steel with needle pivot, |
| fastened to cast rocker stand on head, 1.7:1 |
| Pushrods: |
GM 0.32-in (8mm), 0.075-in wall thickness |
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