 Photo by Jon Kaase The cam...  Photo by Jon Kaase
The cam is a 55mm billet solid roller from Comp Cams. It features 261/268 degrees duration at 0.050 and a whopping 0.828/0.828 lift when used with the Crane 1.8:1 rockers. Lobe-separation angle is 107 degrees and is installed at 104 degrees. The cam on the left is a Chevy stick, but it's the same size as a stock Pontiac piece and is shown here for comparison. |
 With the Stef's oil pan removed,...  With the Stef's oil pan removed, you can see the Melling oil pump and the rest of the bottom end, including the thick pan rail of the IAII block--it's actually solid up to the bend for the cylinder banks. The bottom of the cylinders are notched to allow up to a 4.75-inch stroke without grinding. Note the crank scraper that Kaase made. |
 This earlier version of the...  This earlier version of the IAII block does not have its splayed main caps indexed into the block like the version that's currently available. Despite using just the dowels for positioning the main caps, there were no instances of cap walk. Notice the beefy main webs, too. |
 The aluminum crank scraper...  The aluminum crank scraper that JKRE made uses 0.060 inch clearance between it and the crank. Scraping the excess oil off the crank while it rotates reduces reciprocating weight and saves a few horsepower. |
 The custom CP piston is forged...  The custom CP piston is forged from 2618 aluminum and features a deep-dish (45 cc) that mirrors the chamber shape to get more quench area and lowers compression to run pump gas. The 0.927x2.950-inch tool steel floating pins are from Precision Products and feature Casidiam coating from Anatech LTD to reduce wear. |
HPP Engine Buildup Worksheet
- Engine Displacement: 507
- Horsepower: 851
- Torque: 786 lb-ft
- Bore/Stroke: 4.310 x 4.350
- Bore/Stroke Ratio: 0.99:1
- Rod/Stroke Ratio: 1.49:1
Bottom End
- Block Description: New IAII AllPontiac.com
- Year: 2004
- Preparation: Install sleeves, install inserts to reduce mains to 2.500 in, bore out cam tunnel for 55mm roller cam bearings
- Deck Height: 10.230 in
- Crank: Bryant Racing Billet
- Preparation: It comes finished. Clean and install
- Balancer: TCI Rattler
- Rods: Carrillo forged steel
- Rod Length: 6.500 in
- Preparation: Clean and install
- Bearings: ACL
- Preparation: Calico coating
- Pistons: CP forged aluminum, custom
- Preparation: Calico coating
- Piston-to-Deck Height: + 0.010-in above deck
- Piston Pins: Precision Products tool steel, 0.927 x 2.950 inches
- Preparation: Casidiam coated
- Method Used to Retain Piston Pins in Pistons: Round wire locks with chamfered pins
- Rings: Speed-Pro Hellfire 0.055-in top, Total Seal 1/16-in one-piece second, 3/16-in oil ring
- Preparation: Modified by Total Seal with diamond lapping
- Rod Bolts, Head Studs, Main Studs: ARP
Oiling System
- Windage Tray: Stef's integral with oil pan
- Crank Scraper: Homemade aluminum
- Oil Pan: Stef's 6-qt capacity
- Oil Pump: Melling
- Preparation: Shorten relief spring
Heads
- Casting No.: AllPontiac.com "Tiger"
- Chamber Open/Closed: Welded up
- Head Mods: Make chamber smaller and port
- Combustion Chamber Volume: 37 cc
- Compression Ratio: 12.4:1
- Valves: Ferrera stainless steel
- Intake Head Diameter: 2.230 in
- Intake Length: 6.600 in
- Exhaust Head Diameter: 1.72 in
- Exhaust Length: 6.550 in
- Angles Used in Valve Job: Int. 45-deg seat, 60 deg, 75 deg, Exh. 55-deg seat, full radius under
- Retainers: Manley 10-deg titanium
- Keepers: Manley 10-deg steel
- Valve Seats: CV Products bronze alloy
- Valveguides: Precision Products bronze
- Valve Seals: Crane, PC
- Rocker Studs: ARP
- Rocker Arms: Crane Gold roller race rockers
- Rocker Arm Ratio: 1.8:1
- Pushrods: Trend one-piece
- Diameter: 3/8 in
- Length: Can't remember
Cam
- Brand: Comp Cams
- Type: 55mm Billet solid roller
- Duration at 0.050: 261/ 268 deg
- Lift: 0.828/0.828
- Centerline: 107 deg
- Lobe Separation Angle: 107 deg
- Installed Position: 104 deg
- Lifters: Crane roller
- Valvesprings: Manley
- Type: 221449
- Installed Height: 2.100 in
- Seat Pressure: 300 lbs
- Open Pressure: 750 lbs
- Timing System: BOP Engineering beltdrive
Induction
- Carb, Brand: King Demon
- Size CFM: 1,050 (modified to flow 1,100 cfm)
- Jets: No. 86 square
- Fuel Line Size: No. 6
- Intake Manifold: Edelbrock Victor single-plane
Ignition
- Distributor: MSD Pro-Billet
- Coil: MSD
- Wires: MSD 8.5 mm
- Total Timing: 28 deg
- Initial Advance: 23 deg
- Mechanical Advance: 5 deg
Exhaust
- Headers: Hooker
- Primary Tube diameter: 2 in
- Primary Tube Length: 28 in
- Collector Size: 3.5 in
Gaskets
- Brand: Cometic steel, BOP Engineering Viton rear main seal
Ancillary Components And/Or Procedures
- Moroso valve covers, Royal Purple oil, DRC/ Perfect Bore Sleeves, ACCEL spark plugs No. 762, Wilson Manifolds carb spacer, Chris Howe Cylinder Head Porting