Un-stroked vs Stroked Displacement vs. Crank Angle, etc.

fishy68 said

I have a buddy that's into Chevy's and I noticed that too. I assumed it's because most (if not all) are computer controlled and the less overlap the better to keep the puter happy

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Yes.... reversion from a narrower LSA can really play heck with manifold pressure, and with so many ECU's using MAP as an input to judge air flow, it will mess up the ECU. Plus, 114 LSA is common on stock cams and on cams that are made for mileage and low RPM torque. And it's not that you can't make good HP on a wide LSA......but you won't reach the highest PEAK HP on that.

I wanted mileage and low RPM torque on my 351C and ended up with a 114 LSA cam..... did all I wanted (daily driving, general street hooliganism, towing, 18-19 mpg on the interstate) and still would outrun all sorts of highly cammed, 'lumpy' sounding engines. OBTW, .050" durations were 190/200.....! (Yes, I still have the cam card.) It was all in the engine breathing.... heads, intake, headers, high rocker ratios. Which I suspect is pretty much the same for an LS engine design....