Enginetech P1501

Enginetech P1501 is a cast-aluminum flat-top piston for selected Ford 4.7 / 289 and 5.0 / 302 Windsor engines. It uses a press-fit wrist pin and the traditional 5/64" / 5/64" / 3/16" ring package.

Application / fitment

The P1501 family is cataloged for selected Ford, Lincoln, and Mercury applications using 4.7 / 289 and 5.0 / 302 engines. Catalog coverage spans applications from the 1960s through the early 1990s, but these engines used different crown designs, piston heights, and compression configurations. Compare bore, compression height, and crown style with the requirements of the specific engine version.

• engine family: Ford Windsor / SBF
• engines: 4.7 / 289 and 5.0 / 302
• STD nominal bore: 4.000" / 101.60 mm
• P1501 family sizes: STD, +0.020", +0.030", +0.040", and +0.060"
• compression height: 1.585" / 40.26 mm
• crown style: flat top

Machine each cylinder to the measured piston diameter rather than relying only on the nominal package size. After machining, verify piston-to-wall clearance, deck height, valve clearance, and piston-ring end gaps.

Technical information

• part type: engine piston
• material: cast aluminum
• crown: flat top, no dish
• compression height: 1.585" / 40.26 mm
• wrist-pin diameter: 0.9122" / 23.17 mm
• wrist-pin fit: press-fit
• wrist pin: included
• top-ring groove: 5/64" / 1.98 mm
• second-ring groove: 5/64" / 1.98 mm
• oil-ring groove: 3/16" / 4.76 mm
• piston rings: not included; compatible ring families include R40058 and M40058
• cross-reference: 273AP
• sale unit: 1 piston with wrist pin