World Products Merlin III Block with Added Deck Height - Engine Builder Magazine

World Products Merlin III Block with Added Deck Height

World Products American made Merlin III cast iron big block is now available with an extra .050" of deck height. This new feature allows greater versatility in selecting connecting rods and particularly in selecting pistons with additional compression height to keep the ring grooves and wrist pin bore isolated.

Engine Block Merlin III IronWorld Products American made Merlin III cast iron big block is now available with an extra .050″ of deck height. This new feature allows greater versatility in selecting connecting rods and particularly in selecting pistons with additional compression height to keep the ring grooves and wrist pin bore isolated.

The new Merlin III variant is available with a 9.850″ or 10.250″ deck height. Cylinder bores are semi-finished at 4.595″ allowing for a finish hone to suit the specific pistons and ring packages chosen by the engine builder. Cylinders can be safely bored to 4.625″ and with minor clearance the 9.850″ deck Merlin can accept up to a 4.375″ stroke crankshaft and the 10.250″ deck can accept up to a 4.750″ stroke. Nodular iron 4-bolt main caps are used with ARP fasteners for maximum strength.

The Merlin III is cast from high strength iron alloy and precision machined on CNC machining centers for dimensional accuracy. World’s priority main oiling system delivers lubrication to the critical main bearings first for reliability at high rpm.

Head bolt holes are blind tapped and do not go through into the water jackets. The valley has bosses machined for four extra head bolts to accommodate race heads which utilize this feature. The oil pan rails are machined to accept both stock pans and aftermarket race pans. World’s Merlin III big block is an ideal choice for a wide range of performance engine configurations.

Part numbers for the upgraded blocks are:

081107 MERLIN III bare block,   9.850″ x 4.495″ Nodular splayed 4-bolt caps

081117 MERLIN III bare block, 10.250″ x 4.595″ Nodular splayed 4-bolt caps

Like all World’s blocks and heads, The Merlin III is 100% American made.

For more information: 877-630-6651 or www.worldproducts.net

You May Also Like

Reid 426 Intake Roller Rocker Arms

Reid’s 426 intake roller rocker arm is for “high” ratio stand set ups.

rocker arms

Reid’s 426 intake roller is for "high'' ratio stand set ups. The 426 roller intake rocker arms with a 1.675" fulcrum length is available in ratios of 1.70, 1.75 and 1.80.

Reid machines, designs and manufactures its own line of racing products with an extensive background in drag racing in Top Fuel, Blown Alcohol, Injected, Fuel and Pro Mod classes, but also services a wide variety of motorsports applications.

Lucas Oil Fuel System Products

Preventive maintenance for fuel systems is just as important as regular oil changes.

ACL Race Series Performance Oil Pumps

ACL Race Series oil pumps are designed with high-output and high-volume capabilities.

ACL oil pump
UEM Icon 5.3L EcoTec3 L83 Gen V GDI Pistons

The piston line features forged 4032 alloy for NA and 2618 alloy for boosted applications.

UEM Icon pistons
CHE Ford Godzilla Trunnion Kit

The kit includes 16 heat-treated steel trunnions, 32 bronze bushings, and 33 retainer clips.

CHE trunnion kit

Other Posts

Rislone DEF Crystal Clean

First-of-its-kind product removes damaging crystals from SCR systems, clears P20EE codes.

Rislone DEF Crystal Clean
Pistal High Compression 100mm Drop-in Piston Kit

Made from forged aluminum, these Pistal pistons are both light and have high resistance.

Pistal pistons
B&B Performance Adjustable Billet Timing Pointers

Available for SBC, BBC and SBF, pointers come with stainless steel pointer, fasteners and a black anodized finish.

timing pointers
Holley Sniper 2 EFI

Holley’s Sniper 2 EFI ushers in a wide range of new technologies and features.

Holley Sniper 2 EFI