Description

LSX BOWTIE BLOCK 3.880″ finished siamese cylinder bores, 9.260″ semi-finished standard deck height (ready to be decked) 19260093

Delivering the seemingly impossible combination of professional racing-level strength and entry-level affordability, the LSX Bowtie Block is the next revolution in high-performance engine-building. This durable iron-block casting is based primarily on GM’s production LS7 block, but designed with more material in key areas ? including thicker deck and bores ? to support displacements of 454 cubic inches or more, and unique six-bolts-per-cylinder-headclamping capability that enables forced-induction and nitrous combinations of greater than 2,000 horsepower.

Because the LSX Bowtie block is based on production LS blocks, all of the LS-Series Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories bolt right up to it. There is also a tall-deck version for building even larger engines. Chevrolet Performance delivers the LSX Bowtie Block semi-finished, allowing you to finish it to your needs. Whether you?re building a ?tame? 500-horse street engine for your hot rod or a 1,700 horsepower turbo engine for an Outlaw drag racer, the LSX Bowtie Block is the foundation for an unbeatable combination ? at an unbeatable price!

LSX Bowtie Block ? Standard Deck

? 3.880″ finished siamese cylinder bores
? 9.260″ semi-finished standard deck height (ready to be decked)
? 4.250″ maximum stroke (professional engine builders only!)
? Capable of 364- to 482-cubic-inch displacements
? Orange powder-coated finish
? Accepts all LS and LSX Series heads, cranks, cams, etc.
? Approximate finished weight is 225 pounds

LSX Bowtie Block specs and features include:
? CNC-machined cast-iron block
? True priority main oiling
? 6-head bolts per cylinder
? Standard 4.400″ bore spacing
? Extra-thick siamese cylinder bores
? Semi-finished, machined thicker decks
? LS7-style, 6-bolt dowel-located billet main bearing caps
? Wet-sump and dry-sump oiling capability
? Production-style deep-skirt head bolt holes
? Production bolt hole and thread sizes
? Maintains production exterior accessory mounting provisions
? Front motor plate mounting holes added
? Additional material cast around cam bearings for greater strength
? 8mm exterior/interior fifth- and sixth-head bolt holes
? Standard 0.842″ lifter bores
? Accommodates all LS oil pumps and oil pans
? External oil pump feed (rear of block)
? Main web bay-to-bay breathing holes to support greater horsepower
? Includes unique cam retainer, rear cover and lifter retainers

For the advanced LSX competition engine builder, you will fully enjoy the following features of the new LSX Bowtie Block:
? Front oil feed holes can be plugged/restricted for mechanical flat tappet or mechanical roller lifter applications
? Can be machined safely to 9.200″ deck height
? Maximum 4.200″ bore at .200″ minimum wall thickness (naturally aspirated applications)
? Head bolt holes can be machined for 1/2″ studs
? Cam bores can be machined to accept 60mm roller bearings
? Can be machined for larger diameter lifters and/or 1.060″ bronze bushings
? Front oil feed lines can be plugged and external oil pump and/or aftermarket dry sump systems can be used via oil pump feed at rear of block ? may be required with certain large stroke/aluminum rod combinations
? Belt cam drive systems can be accommodated ? some machining will be required
? Front motor plate can be used for racing chassis applications (sprint car, drag racing, truck pulling, etc.).
? Threaded water plugs can be used for external heaters or coolers
? Extra stock for main bearing align-honed
? 400 mPa tensile strength iron