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You are here: Home > Engine Kits > Ford - 351 Windsor > 438 Cubic Inches (Big Bore) - 4.100 Stroke

438 cubic inch Big Bore Windsor stoker kits are based on 4.125 bore 351 aftermarket engine blocks and a 4.100 stroke crankshaft. They are a perfect replacement for the 351 if you want the increased power and torque you get from a larger engine. Street engines will require a 72cc combustion chamber to keep compression ratios in the 11.2:1 range. Aftermarket cylinder heads and larger camshafts are a good addition to complement the increased capacity. Custom combinations are also available for specialized applications.
Flat Top
Flat top pistons in a 438ci Ford Windsor will generally provide compression ratios in the 12.5:1 (61cc head) range which makes them a good option for competition engines with aluminum heads and larger than stock camshafts. They also work well in heads with larger combustion chambers. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to slightly over .600 valve lift. Alternative compression ratios are available on request.

Villain - Cast Crank, through-bolt rods, forged pistons, designed for stock replacement and mild performance applications.

Vigilante - 4340 Forged Crank, I-Beam rods, forged pistons, designed for Street or Street and Strip performance applications.

Vindicator - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications.

Vanquisher - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications. All components are Made in the USA.
Dish Top
Dish top pistons in a 438ci Ford Windsor will generally provide street friendly compression ratios in the 10.7:1 (61cc head) range which makes them a good option for engines with aluminum heads and larger than stock camshafts. They also work well in heads with larger combustion chambers. Valve reliefs are configured to work with most types of standard and aluminum cylinder heads and will normally fit camshafts to slightly over .600 valve lift. Alternative compression ratios are available on request.

Villain - Cast Crank, through-bolt rods, forged pistons, designed for stock replacement and mild performance applications.

Vigilante - 4340 Forged Crank, I-Beam rods, forged pistons, designed for Street or Street and Strip performance applications.

Vindicator - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications.

Vanquisher - 4340 Forged Crank, H-Beam rods (ARP-2000), custom forged pistons designed for serious Street or all out Strip applications. All components are Made in the USA.