Summit Racing Equipment sent us one of its 6.0L bare blocks a while ago, tasking us to scrutinize it as the basis for a performance build, and more recently, Trick Flow Specialties shipped us its newly developed Gen X 255 heads for LS3 applications and an accompanying top-end kit. Their intentions couldn't have been more obvious: Use our stuff to build a killer combination.
Ironically, it's the combination several of our racer friends have been recommending. Start with a cast-iron 6.0L block, add LS3 heads, and match the cam to whether you're using a power-adder or not. Even if you build the thing wrong, it will be hard to not make 550 hp, naturally aspirated. Be frugal, and you won't spend too much money doing it, either.
Since we are building this engine completely from scratch, the final price may give some readers sticker shock. But we think this build is a good exercise in illustrating exactly how many parts are needed to build a modern LS engine, no matter what the displacement. It shows that you can literally build an entire LS engine with parts sourced from just a few aftermarket retailers, and finally it shows just how much money you can save buying used parts, or even buying a junk engine just to have all the ancillary items, such as fasteners, timing and rear covers, valley covers, and so on. You can build this same combination with a used 6.0L long-block, and it will cost you far less than ours did.
JMS Racing Engines in El Monte, California, handled the machining and assembly, and we will document the build in a couple of installments. This month, we dive into the block and stuff needed to put it together.
|Reconditioned 6.0L engine block
|LS3 top-end kit
Trick Flow Specialties
1248 Southeast Avenue
JMS Racing Engines