Page 2 of Big Block Chevrolet Merlin Engine Blocks by World Products

merlin iii motown small block street world has taken the knowledge of over 15 years experience manufacturing merlin blocks for competition and developed this affordable cnc-machined version that s perfect for marine e.t bracket racing and street use the merlin iii incorporates such important features of the race block as reinforced bulkheads and main webs thicker decks and a priority main oiling system plus essentials for street use like using the stock chevy oil pan pattern oem 2.750 mains and 100 compatibility with mark iv components it has provisions for a spin-on oil filter while the indexed lifter bores assure optimum reliability users now can choose between nodular iron 4-bolt mains or splayed steel billet caps it s important to note that world s merlin iii blocks are far superior to oem parts in terms of quality each block is precision cnc-machined using only two fixturing operations compare this to factory-built blocks which are done on a production line and passed from machine to machine causing what is known as tolerance stacking world blocks are manufactured to qs-9000 specifications the global standard of excellence merlin iii blocks are available with 4.240 4.490 and 4.595 bores to be finish honed by the purchaser or completely race-prepped choice of standard 9.800 or tall 10.200 decks it s an excellent value in big block power made from high density cast iron 9.800 or 10.200 deck height with .600 minimum thickness clearanced for 4.375 stroker crankshaft h-beam steel rods 9.800 deck or 4.750 clearance for 10.200 deck integral mount for spin-on oil filter available with 4-bolt nodular or splayed billet caps can be bored to 4.625 maximum water jackets expanded for better cooling standard chevy cam location and cam bearings priority main oiling system for maximum reliability solid pan rails with stock spacing oem starter fuel pump and engine mounts blind tapped head bolt holes for extra integrity 100 compatible with oem parts indexed lifter bores compatible with all chevy mark iv components stepped oiling 584 .500 .437 extra head bolt bosses in valley to accommodate special racing heads oil drain-back in valley lubricates distributor gear blind holes in valley for screen no risk of cam binding manufactured to qs-9000 specs on two cnc centers eliminates tolerance stacking common to production lines technical specifications material high density cast iron deck height standard 9.800 or tall 10.200 deck thickness .600 minimum cam bearings standard chevrolet main bearings standard chevrolet camshaft location stock lifter bores indexed stock .8437 bore bore 4.240 hone to 4.250 or 4.490 hone to 4.500 maximum bore 4.625 cylinder wall thickness .250 at 4.600 bore water jackets expanded for better cooling lubrication priority main oiling system filtration integral mount for spin-on filter oil pan rails solid stock width crank clearance 4.375 stroke crank 9.8 deck or 4.750 for 10.2 deck main caps nodular iron or billet steel fuel pump oem mount starter oem mount motor mounts dual front and side cyl head holes blind tapped to prevent leaks weight approximately 270 lbs tech note main cap attachment prior to the availability of aftermarket blocks performance enthusiasts were faced with the dilemma of scouring junkyards looking for 4-bolt main blocks or trying to fit 2-bolt blocks with aftermarket cap kits now you have a choice between standard 4-bolt main blocks with nodular iron caps and splayed billet caps rest assured that the 4-bolt setup will provide excellent reliability for most applications but for the serious performance enthusiast the splayed billet setup is preferred for several key reasons the illustration below shows a cross-section of a block casting,and the relationship between bolt holes and the meat of the block as you can see the splayed bolts have a much better anchor due to available material thickness.the multi-directional clamping of the splayed bolts also helps improve bottom-end durability splayed billet main caps standard 4-bolt main caps merlin iii cast iron big block chevy blocks bare part 081100 081110 081101 081101-4595b 081111 081111-4595b 085000 085010 085010-4595b 085100 085110 085110-4595b description merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block merlin iii cast iron bbc block deck 9.800 10.200 9.800 9.800 10.200 10.200 9.800 9.800 9.800 10.200 10.200 10.200 bore 4.240 4.240 4.490 4.595 4.490 4.595 4.240 4.490 4.595 4.240 4.490 4.595 mains standard standard standard standard standard standard standard standard standard standard standard standard main caps nodular iron nodular iron nodular iron nodular iron nodular iron nodular iron splayed billet splayed billet splayed billet splayed billet splayed billet splayed billet 12 rev 2/07 engine blocks

[close]