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GM LSX Performance Parts Tall-Deck Iron Bowtie Block, 9.720" Deck Height
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item# 28-19244059
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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 500+
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!
Features:
- 100% CNC machined cast iron
- True priority main oiling
- 6 head bolts per cylinder
- Standard 4.400"" bore spacing
- Extra thick siamese cylinder bores
- Fully machined bores, ready to hone to fit
- Semi-finished, machined decks, ready to be decked to your specs.
- Increased deck thickness
- LS7 style 6 bolt ""dowel located"" main bearing caps
- Wet sump and dry sump cabability
- Deep skirted head bolt holes (same as OEM aluminum blocks)
- All stock bolt holes are stock thread size
- Maintains all OEM ""LS"" family exterior mounting features
- Front motor plate mounting holes added
- Added material around cam bearings for extra strength
- 8mm exterior/interior 5th and 6th head bolt holes
- All 5 cam bores machined for bearing # 12453169
- Standard .842"" lifter bores
- Screw-in soft plugs
- Accomodated any ""LS"" series oil pand and oil pump
- External oil pump feed at rear of block
- Main web bay to bay breathing holes for increased HP
- Access windows for cylinder head stud access (intake side)
- Extra breathing pocket added near starter for better windage
- Includes new cam retainer # 19166177, rear cover #19166178, lifter retainers #19166182 and OEM replacement cam bearings
Specifics:
- 3.880"" finished siamese bores (ready to be honed to your specifications)
- 9.72"" semi-finished standard deck height (ready to be decked to your specifications)
- Max. 4.375"" reccomended stroke
- Capable of 364 to 500 + C.I.D.
- Orange powder coat finish
- Accepts all Gen III & IV LS heads, cranks, cams etc.
- Approximate finished weight - 225 Lbs
Engine Builder Features:
- Front oil feed holes can be plugged or restricted for mechanical flat tappet or mechanical roller lifter cam applications
- Can be safely machined to 9.70"" deck height
- main bearing cap bolt threads can be machined for aftermarket 12mm fasteners
- Maximum 4.250"" bore (at .200"" wall thickness)
- 6-bolt head bolt pattern (for boosted applications)
- Machined for 8mm inner and outer 5th and 6th head bolts
- Standard bolt holes can be machined for larger diameter lifters and/or bronze bushings
- Front oil feed lines can be plugged and external oil pump and/or
aftermarket dry sump oil systems can be used via oil pump feed at rear
of block - may be required with certain long stroke & aluminum rod
combinations
- Belt cam drive systems can be accomodated (some machining will be required)
- External oil pump feed at rear of block
- 7th transmission bolt has been added (per early SBC) stud can be installed for sanctioning body requirements
- Front motor plate can be used for racing chassis applications
- Threaded water plugs can be used for external heaters or coolers
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