New series of domed pistons for the 302/351 Windsor engines

Diamond is releasing news of a new Dome series of pistons designed to suit the Windsor engines 302 and 351 (4.9L/5.7L), Ford’s venerable 90-degree small-block that succeeded the Y-block and served valiantly for over thirty years from 1962 to the mid-nineties.
These pistons are intended for oval track racers as well as the Sportsman, Weekend Warrior, and Bracket racers. In fact, any Windsor application using fuel with an octane rating in excess of 108 and compression ratios of between 11.5:1 and 14.8:1 will benefit.
This new piston series is not confined to a few popular sizes, but instead embraces a vast range of new part numbers.  For the 302 engine with original valve arrangement, the Diamond Dome series caters to the OEM standard bore (4 inch), and extends to .060-inch overbore.  In stroke lengths, they accommodate the OEM standard configuration (3.00-inch with a 5.09-inch rod) and the longer 3.250-inch stroke as well as the 3.400-inch stroke, both of which use a 5.40-inch rod, providing desirable displacements for the 331 and 347 CID proponents.
Of course the range of stroker crankshafts for the 351 Windsor is greater still. Diamond domes are available for the OEM standard stroke (3.50 inch with 5.956-inch rod) and extend to 4.250-inch stroke lengths. Diamond also offers a big bore 4.125-inch piston for the latest Ford Racing blocks and also Dart blocks.
Though not suited for use in blown or turbocharged engines (because of compression ratios), these premium forged pistons, which are made from 2618 alloy, have the top ring placed sufficiently far down from the piston crown to permit a hefty shot of nitrous.
To dissipate unwanted pressure residing between the first and second rings, a pressure-balance groove is provided.  This thin v-shaped channel acts as a reservoir; thus it prevents excess pressure from unloading the ring, breaching the ring seal, and losing power.
The pistons are supplied with wrist pins (H13 Tool Steel, coated or uncoated), spiral locks, and a conventional ring stack: 1/16-inch (top ring), 1/16-inch (second ring), and 3/16-inch (oil-control rings). For naturally aspirated engines, a Total Seal Plasma Moly top ring would be supplied. To contend with the higher temperatures and pressures of nitrous oxide, Total Seal’s AP stainless steel top ring with its CrN (chrome nitride) anti-friction face coating would be allocated.
On the longer stroke models where the wrist pin bore intersects the oil control ring groove, oil control ring support rails are supplied. To lubricate the wrist pins, double oiling ports in each wrist pin bore are added.
Diamond Dome series pistons for Ford Windsor engines are available in 5-7 working days.
For further information contact:
Diamond Pistons
Telephone (877) 552-2112 or visit www.DiamondRacing.net

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