LSX Engine Blocks

[Underboost]

I wanted to add this because some people think an LS block is an LSX block...well it's not.

The LSX was based off the LS platform.

I put some information down below. Feel free to add more if you would like.
http://www.gmperformanceparts.com/Parts/showcase.jsp

LSX 376 Engine Block
6.2L
4.060
9.72" Tall Deck Height
http://www.gmperformanceparts.com/EngineShowcase/index.jsp?engId=LSX376&engine=LSX376&sku=19171049&engCat=lsx

• LSX 454 Engine Block
• 7.4L
• 4.185 Bore
• 9.24" Standard Deck Height
• http://www.gmperformanceparts.com/EngineShowcase/index.jsp?engId=LSX454&engine=LSX454&sku=19244611&engCat=lsx
• LSX 454R Engine Block
  7.4L
  4.185 Bore
  9.24" Standard Deck Height
  http://www.gmperformanceparts.com/EngineShowcase/index.jsp?engId=LSX454R&engine=LSX454R&sku=19257880&engCat=lsx
  
  
• 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
• 
• 

 

[KevinB]

I think people use lsx as a generic term for any of the Gen 3-4 small blocks regardless of what they are. Technically the 4.8, 5.3 and 6.0's are not LS engines but are referred as them too.
Kind of like when some one asks what a ttype or turbo t is..."well you know what a grand national is? It's the same thing but....."
At least that's how I see it.

The LSX blocks are the stage 2's of the gen3/4 sbc's

 

[Chuck Leeper]

What he said^^^^^^^^^^^^^^^

 

[KevinB]

Some good info:
http://en.m.wikipedia.org/wiki/GM_LS_engine#section_1

 

[Underboost]

I think people use lsx as a generic term for any of the Gen 3-4 small blocks regardless of what they are. Technically the 4.8, 5.3 and 6.0's are not LS engines but are referred as them too.
Kind of like when some one asks what a ttype or turbo t is..."well you know what a grand national is? It's the same thing but....."
At least that's how I see it.

The LSX blocks are the stage 2's of the gen3/4 sbc's

I'm pickin up what you're putting down Kevin