Page 4 of Big Block Chevrolet Merlin Cylinder Heads by World Products

merlin x new 16° design gives pro stock-like flow numbers at sportsman prices note entire head has .300 wall thickness which facilitates generous porting out of the box flow numbers are excellent but there s plenty material for the serious performance enthusiast to dig into this all-new design from world s engineering team combines flow characteristics common to expensive race-only heads with exotic splayed valve setups while allowing use of popular chevy mark iv style valve train components as well as standard intake systems this has been accomplished through rolling the head to a 16° valve angle designing highly efficient intake and exhaust ports and using a special 80cc combustion chamber.you ll probably need to get a set of pistons that take advantage of the chamber design but other than that you can use most everything from a standard big block chevy and when you add up the performance potential versus total cash outlay it s clearly the hot set up for sportsman racers technical specifications material 355-t6 high density aluminum alloy valve seats steel intake hardened steel exhaust valve guides bronze guide plates standard big block guide plates must be modified valve spring seats machined for 1.640 springs valve size 2.350 x 1.830 rocker arm studs 7/16 screw-in style with hex shoulder furnished with assembly exhaust flange stock port location incl accessory bolt holes included in base assembly manley racemaster 2 models or severe duty 3 -4 models 1-pc forged stainless steel valves with swirl-polished heads ring band style 2 models or pc style 3 -4 models valve seals 1.550 2 models or 1.625 4 model valve springs manley 7° chrome moly 2 models 10° chrome moly 3 models retainers keepers and pushrod guide plates -4 models have 10° titanium retainers recommended installation items head gaskets fel-pro #1017-1 or equivalent pushrods requires heat-treated pushrods spark plugs accepts 14mm .750 reach gasketed 5/8 hex ngk 7496 or 4930 or equivalent heat range may vary consult with engine builder intake gasket fel-pro #1211 mr gasket 121 or equivalent exhaust gasket fel-pro #1410 or equivalent head bolts 10 longer than stock required world #832015-10 the 80cc combustion chamber highly effective is unique to the merlin-x head 350cc intake ports part 020750 020750-2 020750-3 020750-4 description bare merlin-x alum head merlin-x 16° alum head merlin-x 16° alum head merlin-x 16° alum head intake 350cc hydraulic 350cc solid/hyd roller 350cc racing roller 350cc cam type merlin-x aluminum 16° big block chevy cylinder heads valve type manley race master manley severe dutyŽ manley severe dutyŽ spring specs 1.550 dual 150 seat 1.550 dual 225 seat 1.640 dual 275 seat max lift .650 .700 .800 chamber 80cc 80cc 80cc 80cc cylinder heads rev 2/07 27

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