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Big Block Chevy 396/402 ci FHR Forged Pistons Solid Dome (Open Chamber Design)
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- Single FHR Forged Piston
- Big Block Chevy 396, 402 ci
- Solid Dome .580 in. (Open Chamber Design)
- 4.155 in. Bore (+.060 396; +.030 402)
- Use w/6.135 in. Connecting Rod, & 3.760 in. Stroke
- 10.6:1/119 cc Compression Ratio
- Sold Individually
Notes: For a 396ci engine (4.095" std bore), this will be a .060 over bore. Compression ratio will be 10.5 on 119cc head (Open chamber head).
Technical Specs: - Alloy: Premium 4032 Alloy
- Bore: 4.155'
- Crankshaft Stroke: 3.760'
- Connecting Rod Length: 6.135'
- Deck Height: 9.800'
- Compression Height: 1.765'
- Pin Size: 0.990' x 2.750'
- Pin Location: Centered
- Solid Dome Top: .580' 41cc 1 Valve Relief (Open Chamber Design)
- Intake Valve Relief: N/A
- Exhaust Valve Relief: N/A
- Top Landing Height: 0.340'
- Ring Grooves: 5/64' Top; 5/64' Middle; 3/16' Bottom
- Gram Weight: 743/141
- Compression Ratio: 10.6:1 w/119cc Heads
Formed Head Relief Design Pistons
The Icon FHR (Formed Head Relief) series are an ''Off The Shelf'' piston loaded with premium features that are usually found in specialty custom made pistons. FHR pistons have valve reliefs that are formed in as the piston blank is pressed into the die. Many of the domed models are solid which allows tailoring the dome height for a specific compression ratio. Forged from 4032 Alloy material containing 11% silicon content which controls the thermal expansion so a tighter piston to wall clearance may be used over the 2618 alloy. The additional silicon wil also increase wearability on the skirts and pin bores making this an ideal material for street and some boosted applications.
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Features
- Premium 4032 Alloy
- Die Formed Valve Reliefs
- Top Land Mini Groove Technology Reduces Friction
- Diamond Finished Piston Skirts
- Second Land Accumulator Grooves Increase Stability in the Bore
- Tru-Arc Lock Rings
- Spacer rings included in short compression heights that intersect the wrist pin bore
- Sold in Sets (except when noted as 1 piston per package)
Click here for reference guide to piston top designs
