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455 DynoTest Part II - The Devil Is In The Details
The next step was to try a... The next step was to try a 1-inch Wilson tapered four-hole carburetor spacer. Jim Taylor decided to go back to his Holley carburetor for the spacer test since the fuel curve was more aggressive than the untuned Demon (we only made a jet change). Wilson claims its spacer will lean the engine out slightly, and since the Holley had No. 83/No. 80 jets, there was plenty of room for tuning with the assortment of parts we brought along. High Performance Pontiac
| Engine Buildup Worksheet | | Engine Displacement | 463ci | | Bore/Stroke | 4.185-in bore, 4.210-in stroke | | Bottom End | | Block Description | '73 455 | | Deck Height | 10.215-in | | Crank | '70-'73 Pontiac nodular-iron | | Balancer | BHJ PO-IB7-S | | Rods | Crower Sportsman forged steel, 6.625-in | | Bearings | Sealed Power HD | | Pistons | JE/SRP forged, flat-top with valve reliefs | | Piston to Deck Height | -0.005-in | | Piston Pins | JE full-floating with double spiral locks | | Rings | Total Seal TS1 gapless, low-tension oil rings (14-lb pull) | | Fasteners | Crower connecting rod bolts, ARP head bolts | | Balancing | By Hoffman Machine | With the Torker II manifold,... With the Torker II manifold, the engine performed best with the 1-inch Wilson tapered spacer, picking up just under 17 hp and approximately the same amount of torque. The Pontiac now produced 500.3 hp. | Oiling System | | Windage Tray | Pontiac 455 | | Oil Pan | Moroso 8-qt | | Oil Pump | Melling M54D, Moroso pickup | | Heads | | Casting Number | 6X | | Chamber Open/Closed | Open | | Head Mods | Ported | | Combustion Chamber Volume | 90cc | | Maximum Flow at 28 Inches of Pressure | 255/179 cfm at 0.550 in | | Compression Ratio | 9.6:1 | | Valves | Ferrea SS, 2.11/1.66-in | | Angles Used in Valve Job | 30- to 65-deg int, 45-deg exh | | Retainers | Comp Cams titanium | | Keepers | Crower jumbo locks, 10-deg with lash caps | | Valve Guides | K-Line liners | | Valve Seals | Corteco all-Teflon | | Rocker Studs | ARP Pro Series 2-in | | Rocker Arms | Crower full roller, 1.65 int/1.5:1 exh | | Pushrods | Smith Brothers seamless chromoly 0.083x5/16x9.150-in |
Pontiac Solstice Research
Get updated on all your car buying needs from safety features, to specs, to crash test ratings and options. Get all the information you need if you are interested in buying a new car like the Pontiac Solstice. The L4 standard engine in the Solstice gives you 173 horsepower with an estimated 22 mpg. It has a trade in value of $15,948.00 which should come in handy when you go to shop for your next car. The Pontiac Torrent and the Pontiac G6 are other vehicles that might interest you.
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Resto Recon Part II
You will recall in our last issue that we examined a '66 GTO, which was bought at auction by an...
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