400 pontiac, stroker 463 build up

grumpyvette

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Engine Displacement 463
Horsepower 650
Torque 596 lb-ft
Bore/Stroke 4.185/4.21-in
Block/Crank Combo 400 block, bored 0.035-in/stock 4.210,
stroke 455 crank
Bore/Stroke Ratio 0.99406:1
Rod/Stroke Ratio 1.57:1

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Pontiac 400 Engine Build - Pump Gas Pounder


Bottom End
Block Description '67 400
Preparation Clean and mag, fill to water jackets with hardblock,
bore and finish-hone to size using a torque
plate, wash and assemble
Deck Height 10.235-in
Crank 455 turned down to 3-in mains
Preparation Balance rotating assembly
Balancer Professional Products SFI-approved
Rods BME aluminum, 6.625-in, 0.020-in side clearance
Bearings Federal Mogul, main clearance 0.0025-in, rod clearance 0.003-in
Preparation Oil feed holes opened up
Pistons SRP 4.185-in forged, 0.005 piston-to-wall clearance
Piston to Deck Height 0.005-in
Piston Pins SRP with spiral locks
Rings Total Seal 1/16-, 1/16-, 3/16-in, Moly top, cast iron second
Preparation Filed-to-fit, 0.018-in gaps
Rod Bolts ARP 2000
Head Studs ARP
Main Studs ARP


Oiling System
Windage Tray None
Crank Scraper Tin Indian Performance
Oil Pan Moroso
Oil Pump Melling M54ds
Preparation Spring shimmed to increase pressure

Pontiac 400 Engine Build - Pump Gas Pounder

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Heads
Brand 340-cfm, 74cc KRE aluminum D-ports
Chamber Heart-shaped, fast-burn
Head Mods Gasket match to TIP-120240 intake gasket,
CNC-ported to 340-cfm
Combustion Chamber Volume 74 cc's
Maximum Flow at 28 Inches of Water
Intake 341-cfm at 0.700 lift
Exhaust 261-cfm at 0.700 lift
Compression Ratio 11.41:1
Valves Ferrea SS 6000 series, 2.19/1.66-in
Retainers Comp Cams 10-deg
Keepers Comp Cams 10-deg
Valve Guides Bronze
Valve Seals PC
Rocker Studs ARP
Rocker Arms Scorpion 1.6-ratio full roller
Pushrods Comp Cams, 5/16-in, 9.450-in long


Cam
Brand Comp Cams custom-grind solid roller
Duration at 0.050 265/272-deg
Lift 0.691/0.691-in
Centerline 110-deg
Lobe Separation Angle 110-deg
Installed Position +4-deg
Lifters Brand Crower roller
Valvesprings Comp Cams
Seat/Open Pressure 230/620-bs
Timing Chain Rollmaster double-roller


Induction
Carb 1050 Holley Dominator
Jets No. 97 square
Intake Manifold Edelbrock Victor 850 base with tapered spacer
Mods Ports matched to heads


Ignition
Distributor MSD Pro-Billet
Amplifier MSD 6AL
Coil Brand MSD blaster
Wires Taylor 8mm
Spark Plugs NKG No. 8
Total Timing 31.5-deg advance locked out


Exhaust
Headers 1.75-in Hedman
Collector Size 3-in


Baseline numbers were established on KRE's Superflow 901 engine dyno. Horsepower checked in at 614 at 6,200 rpm on the first pull. Torque was 563 at 4,600 rpm. Not a bad start. Baseline tuning consisted of No. 97 jets square, 28-degrees timing, and 0.020/0.020-inch valve lash.

Best Dyno Pull
RPM Corrected
Torque Lb-Ft Corrected
HP BSFC
4,300 564.7 462.3 0.446
4,400 572.8 479.9 0.430
4,500 578.3 495.5 0.422
4,600 588.1 515.0 0.410
4,700 582.9 521.6 0.407
4,800 582.0 531.9 0.407
4,900 596.5 556.5 0.404
5,000 573.8 546.3 0.412
5,100 576.3 559.6 0.415
5,200 584.5 578.7 0.402
5,300 580.5 585.8 0.403
5,400 571.2 587.3 0.418
5,500 568.3 595.1 0.422
5,600 582.4 621.0 0.415
5,700 574.1 623.1 0.440
5,800 564.9 623.8 0.424
5,900 554.7 623.1 0.440
6,000 555.0 634.1 0.427
6,100 548.0 636.4 0.447
6,200 545.0 643.4 0.445
6,300 542.2 650.4 0.437
6,400 527.7 643.0 0.439
6,500 501.3 620.4 0.468
 
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