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Air Cleaner

1970 Chevrolet Chevelle SS454: 450 hp

GM finally overcame all its inhibitions in 1970 and allowed its largest-displacement engines to be installed in intermediate cars. The most uninhibited of all was the Chevelle SS454, option LS6, rated at a nice, round 450 horsepower. The LS6 was a heavy-duty 454 with four-bolt mains, big-port heads, solid lifters, an 11.0:1 compression ratio, and [...]

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1969 Plymouth Road Runner/Dodge Super Bee: 390 hp

Dodge had the most memorable name on this one – 440 Six Pack – inspired by the three  two-barrel carbs. Although a three-card 440 was listed in Chrysler’s lineup through 1972, this first year was by far the strongest. It was a limited run of special cars to gain legality in an NHRA class, but [...]

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1968-1969 Plymouth/Dodge Intermediate: 425 hp

For 1968, Chrysler helped the Hemi a bit with a better cam, different valve springs, and a windage tray in the oil pan to hold the oil away from the crank, thereby reducing parasitic power losses. Output was perhaps 30 horsepower stronger, although the 425-hp rating did not change. In those days, the advertised rating [...]

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The Walk-around Inspection

You’ll find the oil filler cap somewhere on the valve cover. If the engine is a longitudinally-installed V6 or V8 the cap could be on either valve cover, if the engine is a transverse installation, the oil filler cap will always be on the front valve cover. Some oil filler caps on older vehicles have [...]

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Where Does All the Horsepower Go?

When a car manufacturer  advertises that a V-8 engine delivers 250 horsepower, what does this mean? Technically, the term horsepower means the capability for doing so much work in so much time. One horsepower is defined as 33,000 foot-pounds of work per minute. So, the power necessary to lift 33,000 pounds one foot in one [...]

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