1970 Olds W31

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1970 Olds W31v
The W-31 was a Cutlass with a 350 CID Performance Option, not a 442 Option and was only built for 2 seasons, in 1969 and 1970. Engine upgrades included the use of what's become known as the 308 camshaft, which was actually the unit's duration; the camshaft also touted .474-inch lift and an intake/Exhaust valve overlap of 82 degrees. The engines were factory blue printed units by picking components off the production line that were matched in weight. The Connecting rods for the W-31 engine were particular to the engine The Cylinder heads were also specific to the W-31 Completing the fuel/air induction system was an aluminum intake manifold with a "performance calibrated" 750-CFM Rochester Quadrajet (part number 7040255), as well as the W25 low-restriction air cleaner assembly. Above that was a new-for-1970 air induction system: twin scoops on top of a fiberglass hood with chrome hold-downs.

My Car Story with Lou Costabile 1970 Oldsmobile Olds Cutlass W-31 Holiday Coupe
On "My Car Story" we're in Downers Grove IL at The Downers Grove Car Show on 8-8-14. We're looking at a 1970 Oldsmobile Olds Cutlass W-31 Holiday Coupe. The car's Owner is Dan Bodine. He’s had the car since 1970. The W-31 version has a 350 cubic inch engine, with the 455 engine valves. ENJOY!

1968 Olds Cutlass S Dyno
This is the original numbers matching engine that has just finished being rebuilt, broke in and tuned on the Dyno, and is now being installed back in the car with American Racing Headers. Also, putting in a new clutch, rebuilt power steering box, new 2 1/2 stainless Exhaust pipes all the way back with new mufflers, new shocks, and I'm switching from 3.08 to 3.42 gears. It went on the Dyno twice, but I was only there on the second day, and it had a 348.6 HP and 378 TQ. My game plan on this build was to keep it stock looking on the outside, but beef up the internals. The only place it will not look stock is that I am going to be using the American Racing Headers. I'm using the stock iron intake, but am jetting the 7028250 Q-jet to W-31 specs. I'm keeping the #5 heads, went with 2.000/1.625 valves, had a 5 angle grind with light bowl work done, and went with Dave's HEI ignition. I went with a full roller setup, filled the heat riser, and welded the center divider. I'll get the compression figures, but it ended up close to 10:1. For more photos, you can check out my Google+ page at https://plus.google.com/u/0/116320690035754081108/posts and feel free to join my Circle.

1969 Oldsmobile W31