Speak with an Expert
Speak with an Expert
Free* Shipping on Orders Over $159
Easy 30 Days- No Hassle Returns
37,000+ 5 Star Reviews
MFG Fitment Guarantee
Couldn't load pickup availability
The JE Pistons forged piston set for Chevrolet 305 small-block V8 engines with 23-degree heads brings durable 2618 aluminum construction to a demanding performance engine build. Each piston combines JE's application-specific crown design with carefully machined ring grooves and wrist-pin bores, giving engine builders a purposeful component for the rotating assembly. The round forging supports a design developed around the intended cylinder head and engine combination. JE's experience in performance piston engineering carries through the finished set, with dimensions that let the engine builder plan the short block around its rod, stroke, and crown configuration. This 3.766 in bore version uses a 1.560 in compression height for its specified engine combination.
| Specification | Details |
|---|---|
| Brand | JE Pistons |
| Piston Series | JE Pistons |
| Manufacturer Part Number | 170771 |
| SKU | JEP170771 |
| UPC | 193564034823 |
| Application | Chevrolet 305 small-block V8 engines with 23-degree heads |
| Piston Quantity | 8 |
| Package | Set of 8 pistons |
| Bore Diameter | 3.766 in |
| Bore Oversize | 0.030 in |
| Compression Height | 1.560 in |
| Crown Design | Flat Top |
| Crown Volume | -5.00 cc |
| Piston Alloy | 2618 forged aluminum |
| Forging Type | Round |
| Average Piston Weight | 412 g |
| Cylinder Head | Standard Chevrolet 23° |
| Valve Relief Quantity | 2 |
| Engine Make | Chevrolet |
| Engine Architecture | Small Block |
| Engine Family | Small Block |
| Engine Detail | 23 Degree |
| Engine Displacement — Reference Build | 310 cu in |
| Connecting Rod Length | 5.700 in |
| Engine Stroke | 3.480 in |
| Block Height — Reference Build | 9.000 in |
| Ring Set Included | No |
| Recommended Ring Set | J100F8-3766-5 |
| Add-On Part Number | J100F8-3766-5 |
| Top Compression Ring Thickness | 0.0640 in |
| Second Compression Ring Thickness | 0.0640 in |
| Oil Ring Thickness | 0.1880 in |
| Top Ring Groove Width | 0.06400 in |
| Second Ring Groove Width | 0.06400 in |
| Oil Ring Groove Width | 0.18800 in |
| Wrist Pin Outer Diameter | 0.927 in |
| Wrist Pin Length | 2.500 in |
| Wrist Pin Material | 5115 Low Carbon Steel, Case Hardened |
| Wrist Pin Wall Thickness | 0.150 in |
| Intake Angle | 22° |
| Intake Depth | 0.270 in |
| Exhaust Angle | 22° |
| Compression Ratio — 58cc Head, Reference Build | 10:1 |
| Compression Ratio — 52cc Head, Reference Build | 10.8:1 |
| Compression Ratio — 64cc Head, Reference Build | 9.3:1 |
| Product Type | Engine Piston Kit |
| Engine Type | Internal combustion |
| Contact Reduction | Yes |
| Double Pin Oilers | Yes |
| DVGP | No |
| Econo Undercrown Milling | No |
| EN Plating | No |
| Gas Distribution | No |
| Lateral Gas Ports | No |
| Mill Undercrown | No |
| Pin Fit | Yes |
| Skirt Coating | No |
| Smooth Crown Finish | No |
| Thermal Crown | No |
| Tuff Skirt | No |
| Ultra Dome | No |
| Ultra Groove | No |
| Ultra Groove Plus Gas Port | No |
| Vertical Gas Ports | No |
| Accumulator Groove | Yes |
| Anodized Top Ring Groove | No |
| Combo 2 | Yes |
| 3D Undercrown Milling | No |
