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FE Power Forums => Non-FE Discussion Forum => Topic started by: Qikbbstang on June 26, 2016, 10:45:31 PM

Title: Pro Stock motor from Engine Labs
Post by: Qikbbstang on June 26, 2016, 10:45:31 PM

The pistons shown are admittedly a three year old design and the article itself is over a year but they are amazing as is the technology within:


http://www.enginelabs.com/engine-tech/pro-stock-engines-whats-the-secret-to-those-big-power-numbers/

Title: Re: Pro Stock motor from Engine Labs
Post by: chilly460 on June 27, 2016, 04:20:26 PM

Trying to wrap my head around the large diameter camshafts.  I understand the necessity on those things with 1200lbs over the nose so it doesn't start twisting, but I know the LS motors use a fairly large cam diameter too.  Seems they can be more "gentle" in the ramps for given lift due to the increased diameter of the base circle, which seems to let them rev quite high with a hydro roller, or run a ton of lift relative to duration and not float the valves. 

A real quick search found this Lingenfelter hydro roller for an LS
215/231 duration @ .050 lift - .631/.644 lift with 1.7 118.0 CL

I think most would agree, that's a pretty aggressive lift number for a really mild cam.