Solitary the 1969 Boss 302 used the Ford HO 302 engine.
The Ford HO 302 engine is the high-output anecdote of the 302 V-8 engine used in the Mustang 302 Boss. The engine was developed as the decision of the Ford company's loss in the 1968 Trans Am racing series. The Ford gang significantly reworked the 302 engine, replacing most of its parts with high-performance ones and using a 351 top instead of a 302 top.
Engine Basics
Horsepower, but, is significantly boosted with 290 horsepower in the street story and 470 horsepower in the Trans Am chase history.
Construction
Muzzle is the twin as the other 302s, 4 inches by 3 inches.The Ford HO 302's example is based off the common 302, nevertheless uses competition spec parts. It is a V-8 with a 90 measure separation between the cylinders. It uses overhead valves threaded down a modified 351 Cleveland mind unit. Displacement is the alike 302 cubic inches and torque stays at 290 pounds-feet, though it comes at a significantly higher rpm of 4,300 as compared to the representation 302 rpm of the mid-2000s.The compression ratio is again the corresponding at 10.5-to-1. The Cleveland sense unit is cross bolted to the 302 short block; this is compelling due to the more advantageous immensity and weight of the attitude unit further as the increased energy the Trans Am anecdote is under. The biggest nickels between the model 302 and the HO 302 is the all-aluminum interpretation, which was cutting column interpretation technology at the clock. Both the street and the Trans Am 302 novel advantage a Holley 4150-C carburettor, four valves, with a album choke that is adjustable from the engine bay. The air intake is 2.2 inches across and the exhaust has a diameter of 1.7 inches.
Notable Parts
The HO 302 uses 351 Cleveland heads instead of normal 302 heads. This is notable because the Cleveland head was used first on the HO 302 and later on production versions of the 351 engine. The spring sets were made of high tensile steel to accommodate the high rpm that race engines had to sustain for long periods of time. This same steel was used for rocker studs, rocker arms, and pushrod guide plates to address the greater wear and tear those parts are under both from the friction and heat the engine produces during racing.
