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GM LSX Performance Parts Iron Bowtie Block, 9.240" Deck Height
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item# 28-19260093
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LSX Bowtie Blocks Deliver the seemingly impossible
combination of professional racing level strength and entry-level
affordability, the LSX 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 a thicker deck and bores-to support displacements of 454
cubic inches or more, and unique six-bolts-per-cylinder head-clamping
capability that enables forced-induction and nitrous combinations of
greater than 2000 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. GM
Performance Parts 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 1700 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 specs and features include the following:
Latest revision for improved metallurgy that results in upwards of 50% increase in tensile strength throughout the block
Latest revision with reinforced deck with strengthened water passages and bolt holes
Latest revision for cam oiling passages that allow clocked cam bearings to optimize camshaft oiling in the highest performance applications with huge spring pressures and high loads
Fully CNC-machined cast iron block
True priority main oiling
6-head bolts per cylinder
Standard 4.400" bore spacing
Extra-thick Siamese cylinder bores, ready for final honing
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
All five cam bores machined for bearing P/N 19167218 (supplied)
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, lifter retainers and
production style replacement cam bearings For the advanced LSX
competition engine builder, you will fully enjoy reading 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
Orange Powder Coated
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