If you are an engine builder putting together an LS engine, there has never been as many options available as there are now.

From full on hardcore race engines to tamed down street motors, the choices in parts can be overwhelming.

We wanted to get a handle on the plethora of components and see if we could make it easier to see the full landscape of engine pieces, starting with aftermarket engine blocks. The cornerstone to any engine build is the cylinder block and the foundation to a great engine build is picking the right cylinder block for your application and budget.

Aftermarket engine blocks used to be an item that was only for the high end racer but manufacturing processes have made many of these blocks affordable for every application. With this many options available to them, many engine builders dismiss the thought of using a reconditioned junkyard block and start their build from scratch with a fresh new aftermarket block. Helping us understand the options available were a handful of experts from the engine block manufacturing world.

Dart's billet block is completely custom - that means that any dimension or configuration you want for your LSX billet race block can be yours. That's one of the main advantages of billet as a material.

You can order custom deck heights, custom cam locations or custom whatever. These blocks really pay off in the longevity and quality.

Dart Machinery opted to go with a billet LS block instead of a cast block due to challenges with consistency in casting an Aluminum LS block. Consistency in quality was the driving factor in our selection to only produce LS blocks in billet aluminum. It's a common misconception that billet blocks can't - or don't - have water jackets. Dart can engineer a water jacket into practically any aluminum LSX block. Chevy Performance LSX Block.

The folks at GMPP sometimes downplay their place in the aftermarket high performance parts market when in reality, they have really produced some of the nicest factory pieces to ever hit the market. Thomson is considered one of the foremost authorities in LS engines having participated in much of the GM third party testing of the engine platform as the engine was being developed and participated in testing each version of the engine product line.

They really put out a good product and they want it to last a long time for people.

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These blocks are engineered strong and hold up really well. Petty, founder of the company and now serves as tuner and engine consultant, carved out a name for himself in Outlaw He was the first to break into the sixes on There are three GM non-production LS series blocks offered by GMPP. The C5R block was developed for the factory based Corvette racing program and have been manufactured in small quantities, while the LSX bowtie standard and tall deck blocks have been stock deck vs aftermarket since to support high performance combinations.

The LSX block is available in both standard 9. The block features 6 head bolts per cylinder, LS7-style 6-bolt dowel located billet main caps, and a bunch of other performance-oriented features not necessarily found on production LS blocks. The LSX block is the standard bearer of the class. Inexpensive for what you 1975 stock market chart history, it can take a beating and keep on ticking.

However, machine work is going to be more extensive on the LSX block than either the Dart or RHS, and it is heavy as all iron blocks are. Extra-thick siamesed cylinder bores with standard 4. LS Aluminum Race Block. RHS is the newest player in the game, and the one probably making the most waves at the high end of the marketplace. Top builders like VA Futures trading brokerage services llc and LME engines employ the RHS block as the ultimate in light weight and durability.

There are engine buiders adding deck plates to raise the deck on the OE blocks but you are limited on the stroke.

We have taken advantage of both with our design. RHS has raised the camshaft centerline. For the gear drive fanatics, RHS also has a gear drive timing set available.

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With a nasty stroker crank, you'll need to notch many blocks. Not the RHS block - it comes pre-notched, even the sleeve is clearanced. Briggs also pointed out that using a longer stroke can cause problems on the bottom skirt of the block requiring special oil pans to allow room for the crankshaft swing of the longer stroke.

Check out the webbing on the RHS block.

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This is a block designed from day 1 as a serious race block, or for nasty street engines making 1,plus HP. RHS engineers found another area of concern with stock LS Blocks in the form of windage due integral forex turkiye the longer stroke in-conjunction-with block skirt.

RHS LS Aluminum Race Blocks are available in these deck and bore combinations: Most popular aftermarket aluminum block, with the best reputation for power, durability, and casting precision. Great for a 2, hp race engine, or a nasty turbo street motor.

While the definition of big horsepower and who was first can be debated over and over again, the fact that World Products is no stranger to GM engines is cannot be questioned.

Starting with the venerable small blockWorld Products has focused on manufacturing very effective engine blocks and cylinder heads for GM fanatics. World Products Warhawk blocks are available in these deck and bore combinations: A good option to look into for an affordable block that has a track record in the 6-second zone.

As we have seen above, aftermarket LS blocks can come in practically any deck height or bore size that you could ever want. If something is unavailable off the shelf, then a Dart custom billet block with whatever specification you desire is even available.

With this many options, a block can be found that would accommodate a build from street use to all out track use. Regardless of the application, there is an aftermarket LS block that will perform beyond expectations and not require you to have a NASA type project budget.

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