JE Pistons, as we all know, manufactures pistons for plenty of different racing engines. One application that has been absent from JE catalog has been the large bore nitrous and blown alcohol. It seems like only yesterday that engines breaking over 500 cubic inches were the hot ticket news in drag racing. Now of course it isn’t uncommon to see 565s or even 632s being put together for a number of different classes. Everything from blown alcohol to nitrous cars and nasty NA engines are being based off these massive big blocks.

JE recently told us that they are in the final stages of releasing four brand new pistons offerings for the drag racing engine builders and racers: an open chamber blown alcohol dome, open chamber nitrous, 632 flat top, and a 632 nitrous series. We had to know more, so we had JE send us some of the tech facts on each of these pistons.

BBC Open Chamber Blown Alcohol Dome

• Designed specifically for high horsepower, blown alcohol BBC engines.
• Made from forged 2618 alloy
• Works with both double spiro locks or buttons since many racers have their own preference
• Designed for popular Top Dragster and Top Sportsman engines
• Fits popular open chamber heads
• Heavy duty .200″ wall wrist pins included
• Accumulator grooves
• Double forced pin oilers
• Designed specifically for high boost blown alcohol drag racing.
• Valve reliefs accept oversized valves and are compatible with angle milled heads.
• Precision CNC machined ring grooves accept 1/16, 1/16, 3/16 rings.
• 0.200″ wall thickness Tool Steel pins included.

Includes:

• Pin #990-2930-20-52S (186g)
• Double spiro locks (#990-042-CS)
• Double pin oilers
• Accumulator Grooves

BBC Open Chamber Nitrous Series

• Made from forged 2618 alloy
• Available for popular 565 and 632 BBC nitrous motors
• Vertical and lateral gas ports
• Designed for JE Pro Seal “hardened Nitrous Series” Rings
• .043″, 1/16, 3/16 ring package
• Utilizes a 3/16″ oil ring to ensure oil control in nitrous engines
• Fits popular open chamber heads
• Vertical and lateral gas ports have been incorporated to optimize top ring seal and reduce friction.
• Ring grooves are machined to accept our series J860 “HNS” Hardened Nitrous Series rings with .043 back-cut top ring, 1/16 taper face second ring and 3/16 oil ring.
• Fits most open chamber cylinder heads.
• Part Number for a decked block available.

Includes:

• Pin #990-2930-18-51S (174g)
• Double spiro locks (#990-042-CS)
• Vertical and Lateral gas ports
• Contact reduction grooves

BBC 632 Flat top

• Specifically designed for Naturally Aspirated 632 engines to fit the following cylinder heads: 12º Raptor, 12º Pro-Filer, Dart Big Chief 14º (program #’s 3815 & 384), Sonny Tru-Pro 14.5º, and Brodix PB1200.
• Precision CNC machined ring grooves are designed for .043 back-cut top rings, .043 D-wall 2nd rings, and 3.0mm oil rings.
• Compression distance and compression ratio calculated with zero deck clearance at listed block height.

Includes:

• Pin #990-2930-18-51S (174g)
• Double spiro locks (#990-042-CS) Rail Supports(# 4600-203)
• Double Forced Pin Oilers, Accumulator Grooves, and Vertical gas ports for maximum top ring seal

BBC 632 Nitrous Series

• Vertical gas ports
• Designed with large pin boss span and extra clearance to accept aluminum rods
• Designed with 3/16″ oil rings for improved oil control (critical in nitrous engines)
• Intake valve relief edge has been machined to remove thin outside area, reducing hot spots and likelihood of preignition
• Utilizes JE Pro Seal Hardened Nitrous Series .043″, .43″, 3/16″ ring package
• Specifically designed for Nitrous-fed 632 engines using aluminum rods.
• Valve reliefs fit the following cylinder heads: 12º Raptor, 12º Pro-Filer, Dart Big Chief 14º (program #’s 3815 & 384), Sonny Tru-Pro 14.5º, and Brodix PB1200. Precision CNC machined ring grooves are designed for .043 back-cut top rings, .043 D-wall 2nd rings, and 3/16 oil rings.

Includes:

• Pin #990-2930-18-51S (174g)
• Double spiro locks (#990-042-CS) Rail Supports(# 4600-203)
• Double Forced Pin Oilers, Accumulator Grooves, and Vertical gas ports for maximum top ring seal

Be sure to check out JE’s Website to find out more about these drag racing pistons as it becomes available.