Guest 77vegasz Posted August 25, 2004 Share Posted August 25, 2004 I was messing around with Desk Top Dyno to see what potential a much-maligned 307 had. I entered the following data: Bore: 3.915 (.040 over) Stroke: 3.75 (a 383 stroker crank) Compression: 10.5 to 1 Heads: Pocket ported 305, 58 cc head with 1.94 and 1.50 valves Runners matched to Felpro medium race gasket, exhaust unshrouded and polished. Carb: 750 CFM 4 brl. Intake: Single plane Exhaust: Small tube headers and mufflers Cam: Chevy 350 hp-327 cam. I selected these components because I have all this crap lying around. The combination makes a 361 stroker, and on the DTD makes, get this…. 413 ft/lbs of torque at 4500 rpm and 380 hp at 5500 rpm. And yes a 383 would make more, but for the often trashed 307 this is pretty good. Since I have all this stuff on hand, I am making this my winter project, and will keep everyone updated to the progress and outcome. Jon Quote Link to comment Share on other sites More sharing options...
Guest plainswolf Posted August 26, 2004 Share Posted August 26, 2004 Sounds plenty worth it to me especially since you already have the parts laying around.. I think, perhaps, that it's sometimes a maligned engine for it's smaller bore size. However I believe that the Gen III sbc, the LS1's are about a 3.9 inch bore by a 6.22 inch stroke, and nobody doubts the power they are capable of producing.. It may be a bit unqiue but it doesnt sound like it wil be lacking any in power.. Quote Link to comment Share on other sites More sharing options...
Guest 77vegasz Posted August 26, 2004 Share Posted August 26, 2004 The entire engine, with the exception of the crank was the first engine in my Z. It produced about 340 hp at the flywheel and was alot of fun. I now have a 350 in the car, and bought the crank to make a 383. I do not want to take the car out of service too long, and my garage is sort of full, so I decided to see what would theoretically happen if I changed the crank in my 313, (307 .040 over) motor, and the numbers look good. It will be an easy build, and swapping the motors is an afternoon. If it sucks, I can always swap back to my current motor. If it works as well in real life, I have a 1980 Camaro with a tired 305 that can use the 350! Jon Quote Link to comment Share on other sites More sharing options...
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