 |
 |
 |
|
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 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 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:
• Fully CNC-machined cast iron block
• True priority main oiling
• 6-head bolts per cylinder
• Standard 4.40" 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 12453169
(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 9.20" deck height
• Maximum 4.250" 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 |
|
|
|
|
|
|
|
|
