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07-13-2015 09:17 PM #35
The whole “lopey cam” sound is really over rated. Its one thing to hear a lope at idle at the strip where the engine needs a lot of lift, lots of duration and a narrow lobe separation to maximize the air flow through the engine. It will scream to 6,500 RPM and beyond and run for a few seconds but idles like crap – which is okay at the strip. We all love that experience and somehow think it can be had with our street engines that rarely see over 5,000. The lope you hear is the overlap when the intake and exhaust valves are open at the same time and the intake charge is going out the exhaust port. Might sound “cool” but to an educated ear it indicates a bad choice of cam and money being wasted.
I’m really not trying to bust your chops, but extreme duration and narrow lobe separation on the street is a recipe for disappointment. 220-230 at 0.050 and 110-112 degrees separation are good numbers to work from for almost all street applications. I tend to take a somewhat conservative approach to cam selection for street drivers. My choice may not be the most powerful – especially above 5,000RPM, but it will offer an engine that will generate decent power and perform well for a long time between idle and 6,000RPM. To the untrained ear that lumpy cam may sound bad ass, but they just don't work well in street drivers.
My two cents,
Glenn"Where the people fear the government you have tyranny. Where the government fears the people you have liberty." John Basil Barnhil





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A belated Happy 78th Birthday Roger Spears
Belated Happy Birthday