• Traum 89mm Forged Pistons for J series Engine
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Traum 89mm Forged Pistons for J series Engine

Traum 89mm Forged Pistons for J series Engine

$1,406.00
$1,420.00 $1,406.00
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Product Code Traum89mmJdish
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Traum 89mm Forged Pistons for J series Engine

Traum 89mm Forged Pistons for J series Engine

$1,406.00
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Description
Traum Forged Piston set for J series Engines. Includes Pistons, Rings, Wrist Pins, & Clips.

89mm is the standard size piston for all J32 & J35 blocks.

Here is the estimated compression ratio based on matching Crankshaft & Rods.
Dish Top
J32 Crank & Rods = 9.2
J35 Crank & Rods = 9.85
J37 Crank & Rods = 10.15

Flat Top
J32 Crank & Rods = 9.9
J35 Crank & Rods = 10.6
J37 Crank & Rods = 10.9

Dome Top
J32 Crank & Rods = 10.8
J35 Crank & Rods = 11.75
J37 Crank & Rods = 12.1

Tall Dome Top
J32 Crank & Rods = 11.5
J35 Crank & Rods = 12.4
J37 Crank & Rods = 12.75
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J
JPN850R
Made in the USA

These forged pistons are made in USA. I wanted to lower the compression rate from the OEM’s high 11:1 to 9.??:1 to lower the risk of detonation. These are on a little heavy side, but Traum seems the only manufacturer that makes forged pistons with dished top for J32A3. They are not cheap, but as my original motor couldn’t take a few PSI of boost, I needed these. A piston ring clearance chart is included.