03 June 2013

Tech Keeps Marching Along

A 1942 Rolls Royce Merlin 61 engine is carburetted, 27 Liter displacement and makes 1,580 hp with the full supercharged setting selected (about 9 pounds of boost) at around 3,000 rpm.  This requires 100 octane gas.  58.52 hp/l.  It also weighs 1,640 lb. dry (0.96 hp/lb) and I am not sure if this includes the supercharger.

A 2008 Chevrolet LS3 engine is electronically fuel injected, 6.2 Liter displacement and makes 436 hp naturally aspirated at around 5,900 rpm.  93 octane fuel is required.  70.32 hp/l.  It's about 415 lb as a crate engine (1.05 hp/lb).

Adding a supercharger to an LS3 (Edelbrock E-Charger) runs approximately 7 pounds of boost and ups the power to 599 hp using the same 93 octane fuel as before.  96.61 hp/l!  The kit is 125 lbs, but parts are removed from the base engine, so the total is less than adding 415 and 125; but...  Even at 540 lb total, it's 1.11 hp/lb.

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