Drag Race
In the eyes of the Chevy enthusiast, ultimate acceleration reigns supreme. Everything plays second fiddle in the performance-oriented minds of many enthusiasts, including handling, comfort and so on—besides, those things are tough to quantify. Acceleration and top speed are what we are into and unfortunately, all too often, last on the performance priority list is braking. Remember, no matter how quick or fast a particular Chevy is, and no matter how well that Bow Tie handles, no matter how plush it is, no matter how straight the body panels are or how crafty it’s built, eventually you have to get the thing to stop.
Wheel choice is probably the single biggest factor in determining the direction of your project. Just as the thought of installing stock steel wheels on anything other than a restoration seems absurd, the idea of installing race-styled wheels on a restoration may be just as absurd. Or is it?
You can’t throw a stone these days without hitting an aftermarket aluminum cylinder head. They perform as good or better than anything the factories put out, and then some. They are much lighter than iron heads, and they’re now extremely affordable. Thanks to competition in the aftermarket, it could easily be said that for the performance and price benefits of a new set of aluminum heads, why would anyone bother refurbishing a set of iron castings?
Some Years Ago, Chevrolet Began Lowering Engine Compression (To 8.50:1) In An Effort To Meet Tailpipe Emissions Numbers. It Also Retarded Camshaft Timing In An Effort To Lower NOX (Nitrides Of Oxygen/Unburned Particulates). By 1974, Horsepower, Torque And Overall Engine Efficiency Had Dropped Some 30 Percent To 50 Percent. Chevy’s RPO L48 And LM1 350 Small-Block V-8s Then Got A Flow-Restrictive Catalytic Converter In 1975, And Finally In 1985, A New Monolith Catalytic Converter, As Well As Direct-Port Fuel Injection And Improved Camshaft Timing, Boosted Horsepower, Torque And Engine Efficiency.
The jump in boost pressure upped the power output from 559 hp to a whopping 613 hp. The peak torque was up as well, from 513 lb-ft to 545 lb-ft.
