Hot Rod

LS3/L92 Rectangle-Port Cylinder Heads Test - The Even More Ultimate LS Cylinder Head Test - Speed Parts Testing

Loyal HRM readers will no doubt remember our "Ultimate Chevy LS Cylinder Head Test" in the Dec. '10 issue in which we tested 11 different LS1/LS6 cathedral-port-style heads. In this issue we're doing ...
Hot Rod

Testing The New GM L92 Cylinder Heads - 550 hp for Under $4,900

The ante has just been raised. What we have here is a junkyard 6.0L engine with stock production L92 heads, a not-so-big hydraulic roller cam, and an 850-cfm carburetor that makes an astonishing 1.5 ...
Motor Trend

History of the LS Engine and Cylinder Head Casting Number Spotter’s Guide: LS1, LS6, LS2, LS3, LS4, L99, LS7, LSA, LS9, LQ9, LQ4, L92, L94

Back in the early 1990s the Gen II LT1 and LT4 engines powered GM's hottest performance cars, but GM read the tea leaves and knew that this platform would not be able to get them where they would ...
Motor Trend

L92 vs LS1 and LS2 Heads - Sick Flow, Less Dough- Tech

If you've been reading GMHTP lately, you know that the new L92 heads are superior to stock LS1 and LS2 heads. But what happens when you put them to task against one of the best 15-degree heads on the ...