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JE Ultra Series Harley Milwaukee-Eight Piston, 2618, Dish, 4.310 in. Bore, 1.080 CD, -7.30 CC, 11.25-1

Your Price: $347.99

SKU: 394100S

In Stock

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JE Ultra Series Harley Milwaukee-Eight Piston, 2618, Dish, 4.310 in. Bore, 4.500 in. Stroke, 1.080 CD, -7.30 CC, 11.25-1, Set of 1

As the leader in forged racing pistons, JE Pistons has been at the forefront of V-Twin and Harley-Davidson piston performance for decades, with over 75 years of experience. JE’s carefully developed line of V-Twin pistons is engineered, forged and machined 100% in the USA and are designed for each specific engine and use application to provide the ultimate combination of durability and performance. From fun and powerful cruisers to all-out V-Twin drag racing, JE Pistons’ performance is proven with every handful of throttle. Equip your bike with the best in forged pistons.

  • Ultra Series Forging
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GTIN:

Piston Series

JE Pistons
Cylinder Head

M8 4V
Bore Diameter

4.310 IN
Piston Head Type

Dish
Compression Height

1.080 IN
Piston Volume

-7.30 CC
Piston Material

2618
Piston Quantity

1
Forging Type

FSR
Piston Average Weight

459 GR
Ring Set Included

Yes
Ring Set Part Number

CSH4434310-1
Ring Quantity

1
File Fit

Yes
Top Ring Radial Width

0.173 IN
Top Compression Ring Thickness

0.0430 IN
Top Ring Facing Material

AP Stainless
Top Ring Material

AP Stainless
Top Ring Shape

Barrel
Second Ring Axial Height

0.043 IN
Second Ring Radial Width

0.170 IN
Second Compression Ring Thickness

0.043 IN
Second Ring Facing Material

Ductile Iron
Second Ring Material

Ductile Iron
Second Ring Shape

Napier
Oil Ring Axial Height

3.00 MM
Oil Ring Radial Width

0.0145 IN
Oil Ring Thickness

3.00 MM
Third Ring Facing Material

Chrome
Instructions: Enter a value in the un-shaded boxes below as they pertain to your engine.
Note: For pistons BELOW the block @ TDC – value in box must be a NEGATIVE number (-0.000)
Note: For pistons ABOVE the block @ TDC – value in box must be a POSITIVE number (0.000)
Note: For a DISH piston – value in box must be a NEGATIVE number (-0.0)
Note: For a DOME piston – value in box must be a POSITIVE number (0.0)
Note: Manipulate the DOME/DISH & PISTON to DECK volumes to get the ratio you want.
Enter the number of cylinders of your engine
Bore
Finished bore of your engine
Stroke
Stroke of your engines crankshaft
Rod Length
Ctr. to Ctr. length of your connecting rods
Gasket Bore
Head Gasket bore diameter
Comp. Gasket
Compressed Head Gasket thickness
Block Deck Height
Center of main bearing bore to top of block
Top Ring Down
Top of 1st ring to top of pistons(FLAT)
Chamber Volume
Cylinder Head chamber volume in CC’s
Dome/Dish Volume
DOME (-) or DISH (+) vol. (theoretical) in CC’s
Piston to Deck
Top of BLOCK to top of piston (FLAT) @ TDC
Click “Calculate” for dimension results.
Total Volume
 
Cylinder Volume
Total cylinder volume in CC’s =
Clearance Volume
All effective vol. above block deck @ TDC in CC’s =
Gasket Volume
Volume of your head gasket in CC’s =
Top Ring Volume
Total volume above the top ring @ TDC in CC’s =
Deck Volume
Volume of area above the pistons @ TDC in CC’s =
Piston Top Land
Piston top land diameter for volume calculations =
1/2 Stroke
1/2 stroke of your engine’s crankshaft in inches =
Compression Ht.
Ctr. of piston pin to top of piston (FLAT) in inches =
Cubic Inches
Cubic inch displacement of your engine =
For the given dimensions, your compression ratio