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The Olds 350's design specs Offer ample perfor- mance potential: Its big bore and st-a' t 3 stroke yield 350.1 ci. ample room for large valves. and potential high-rpm capability; long 6.inch rods are stan- dard and produce a favorable 177: 1 rod/stroke ratio.
We've updated the original Olds Performance Manual with tips on the 403 and 307 Oldsmobile Division V8s, as well as information on improving the performance of the last body on frame car (G Body) that was produced from 1978 to 1987.
You can get a quick estimate of the year of the engine by looking at the 1" high casting number on the lower-left corner of the block and/or head. Watch out for windowed main webs on 1977 and later blocks.
Despite common displacements, all used different bore and stroke combinations with completely different blocks and heads (and everything else). This applies back to the 30's and farther. In the 60's, 70's, and 80's, many divisions and makes built common displacement engines, say 350, 400, 425, and 455.
5 sty 2024 · Let’s view the specs: Cast iron block. Displacement: 350 CID. Bore and stroke: 4.057″ x 3.385″. Five main bearings.
10 lip 2012 · According to Joe Mondello, famous Oldsmobile performance enthusiast, you can bore out a 303 or 324 to 4 inch bore (0.125 cut). Block should have enough material left for another 0.030 cut! (If you don't know history of the engine, it would be wise to sonic check block so you know how much material you have.)
oldsmobile's 4-4-2 and w-machines Detailed 4-4-2, W-30, and W-31 specifications; special packages; new performance parts and accessories: plus an order form inside. FOR 1970,
