Page 77 - 2018 Racecar Engineering Engine Parts and Accessories Catalog

PISTON RINGS

8 Cylinder Ring Sets (Cont.)
4.600" Bore - File Fit
Part No. Description Size Top 2nd Oil Oil Ring Tension
JE Pro Seal
JEPJ100U8-4600-5 Ductile Iron, Plasma Moly, D-Wall 4.605" 1/16" 1/16" 3/16" Low
JEPJ100U8-4600-5 Ductile Iron, Plasma Moly, D-Wall 4.605" 1/16" 1/16" 3/16" Ultra Low
JEPJG8608-4600-5 Carbon Steel, Nitride, D-Wall, Backcut Top 4.605" .043" 1/16" 3/16" Standard
JEPJG7708-4610-5 Carbon Steel, Backcut Top 4.615" .043" .043" 3.0mm Low
Speed-Pro
SEAR19108-5 HellFire Top Ring 4.605" .043" 1/16" 3/16" Standard 19-22LB
SEAR19109-5 HellFire Top Ring 4.605" 1/16" 1/16" 3/16" Standard 19-22LB
SEAR19118-5 HellFire Top Ring 4.605" .043" .043" 3.0mm Low 15-18LB
SEAR10433-5 Plasma Moly 4.630" 1/16" 1/16" 3/16" Standard 19-22LB
Total Seal
TOTCR9150-5 Classic Race, Ductile Iron Moly Top 4.605" 1/16" 1/16" 3/16" Standard 23LB+/-
TOTM9150-5 Maxseal, Ductile Iron Gapless Top 4.605" 1/16" 1/16" 3/16" Standard 23LB+/-
TOTMS9150-5 Maxseal, AP Steel, Gapless Top 4.605" 1/16" 1/16" 3/16" Standard 23LB+/-
TOTT9150-5* TS1, Ductile Iron Moly Top 4.605" 1/16" 1/16" 3/16" Standard 23LB+/-
TOTMT4309-5 TNT, Ductile Iron Moly Gapless Top 4.605" .043" 1/16" 3/16" Standard 23LB+/-
TOTCS4309-5 Classic Race, AP Steel Top 4.605" .043" 1/16" 3/16" Standard 23LB+/-
TOTT4309-5* TS1, Ductile Iron Moly Top 4.605" .043" 1/16" 3/16" Standard 23LB+/-
TOTTS4309-5* TS1, AP Steel Top 4.605" .043" 1/16" 3/16" Standard 23LB+/-
TOTCS4010-5 Classic Race, AP Steel Top 4.605" .043" .043" 3.0mm Low 9LB+/-
TOTCT4010-5* TNT, Ductile Iron Moly Top 4.605" .043" .043" 3.0mm Low 9LB+/-
TOTMS4010-5 MaxSeal, AP Steel Gapless Top 4.605" .043" .043" 3.0mm Low 9LB+/-
TOTMS4010-15 MaxSeal, AP Steel Gapless Top 4.615" .043" .043" 3.0mm Low 9LB+/-
TOTCS4010-30 Classic Race, AP Steel Top 4.630" .043" .043" 3.0mm Low 9LB+/-
TOTT3340-5* TS1, Ductile Iron Moly Top 4.635" 1/16" 1/16" 3/16" Standard 23LB+/-
Wiseco
WISWG7708-4600-5 Stainless Gas Nitrated Top, Napier 2nd 4.605" .043" .043" 3.0mm Low
See Page 73 for Total Seal Prefix Legend
4.700" Bore - File Fit
Part No. Description Size Top 2nd Oil Oil Ring Tension
Total Seal
TOTT1601-5* TS1, Ductile Iron Moly Top 4.755" 1/16" 1/16" 3/16" Standard 23LB+/-
*Gapless second ring. See Page 73 for Total Seal Prefix Legend
Oil Rings
Part No. Description Size Oil Ring Tension
JE Pistons
JEP4185-183 Oil Rail Support (ea) 4.185" - 4.214" —
JEP4310-193 Oil Rail Support (ea) 4.310" - 4.349" —
JEP4600-203 Oil Rail Support (ea) 4.600" - 4.635" —
Mahle
MAH4030-300S Oil Rings (8pk) 4.030" / 3.0mm Low

TECH TIP

Piston Ring Selection
Piston and ring manufacturer's have learned over the years that there is significant horsepower and fuel economy to be gained by reducing
internal engine friction caused by piston rings. It wasn't that long ago that 5/64" (.078") or 1/16" (.062") compression rings, coupled with 3/16"
(.187") oil rings, were the only piston rings available for most domestic V-8's.
The auto manufacturers abandoned 5/64" compression and the accompanying 3/16" oil rings in favor of narrow, metric-sized rings. GM LS,
Ford Modular and late Chrysler Hemi use 1.5mm compression and 3mm oil rings. Narrow rings have less contact area and reduced radial wall
tension for a significant reduction in internal friction.
Modern, narrow rings provide other benefits as well. They are lighter, which may seem insignificant, but in racing applications with engine
speeds in excess of 8,000 RPM, the weight savings are truly beneficial. Piston ring "flutter", where the ring actually vibrates within the ring
groove at high engine speeds, is also reduced. Narrow rings also conform better to bore distortion.
When selecting piston rings for a race engine, the engine builder tries to achieve a perfect balance between reduced internal friction and ring
seal and durability. There may be a slight increase in the amount of oil in the combustion chambers, on piston tops and on spark plugs if a low
tension oil ring set is used. Engines with nitrous injection, a supercharger or a turbocharger should never use low tension oil rings because
excessive oil in the combustion chambers leads to detonation and, ultimately, broken rings and pistons.

76 2018 ENGINE BUILDER CATALOG