On paper, however, the Boss '9 has the potential to deliver big power numbers-if it could only capitalize on its attributes. Engine builders John Lohone and Adney Brown of Detroit-area Performance ...

Introduced in 1969 as Trans Am and NASCAR homologation models, the Ford Mustang Boss model series initially proposed two engines: a small-block 302 and the colossus 429. While the former sold over ...

Engine builders John Lohone and Adney Brown recently took up the challenge to see what a properly prepared Boss 429 street engine could do when its known deficiencies were addressed.

The Boss 429 and 429 Super Cobra Jet V8 engines rank as some of the most powerful engines ever put in the Ford Mustang. In fact, if we limit our discussion to first-gen Mustangs, these engines ...

Engine SpecsDisplacement: 429 ci 4.36x3.59 Piston Dish: Flat-top with valve reliefs Wristpins: 0.990 floating Combustion Chambers: Semi-hemispherical Compression Ratio: 9.0:1 Camshaft: Comp solid ...

In the truest sense of the word, no automobile engine actually has a fully hemispherical combustion chamber. However, according to the looser hemi definition, the Ford Boss 429 engine is ...

Check out this 2008 Ford Mustang built by John Kaase that has a Ford engine that displaces 589ci, Kaase Boss Nine cylinder heads, and a T56 Viper-based transmission inside Popular Hot Rodding ...

Trick Rides customers can choose from drivetrain options that include a VMP Performance-supercharged 5.0-liter Coyote V8, a 429 cubic-inch Kaase Boss Nine, or a Ford Performance 427 cubic-inch V8.

Gone is the old engine, in its place is a colossal 598-cubic-inch (9.7-L) Boss Nine V8 from Jon Kaase Racing out of Winder, GA.