Engine
If you’ve ever imagined a time when you could simply pick up the phone or send an e-mail to General Motors and order the engine of your dreams, pull it out of a box delivered to your door and plug it into the car of your dreams, then stop dreaming as that time has come. While it’s not new information that GM Performance Parts provides an assortment of engines to choose from, it’s never been easier to select the one that is best for your budget and the intended purpose of your car.
Bob Gruitch just thought his car was not performing up to his expectations. A ’55 Chevy equipped with a 502 big block, square port heads and a Crane H296-2 camshaft should be more than enough power. But it lacked power and didn’t idle all that well, especially in gear. This shouldn’t be happening with an engine built by John Gianoli at Reggie Jackson’s High Performance Engine Shop, so Gruitch figured he had something wrong and brought the car to John Bishop’s Hot Rod Tuning Service to have it checked. He’s lucky that he did.
When GM introduced the Gen III small block in the F-body, it rekindled a dying performance flame with its new-generation small block. While the Gen I small block actually kick-started the hobby and got it into gear, it’s the latest family of small-block engines that has grabbed the attention of enthusiasts everywhere—and for good reason.
Would you believe that one of these cams could provide an extra 200 hp to your combination? It’s true. Actually, the truth is that the installation of a stock cam will cost you as much as 200 hp.
If you’re in the planning stages of building your car, or even if you have finished and are driving it, there are lots of free or inexpensive things you can do to make your ride faster and/or more efficient. This month, The Auto Builder gives you 25 of those ideas. Most of these free tips simply involve putting your car on a diet. Every 100 pounds of weight removed from your car equals dropping 1/10th of a second at the strip. Even though you may not be racing, the same theory applies to the street, and also to the extra weight you must lug around.
We showed you how to build a small-block engine that could make over 500 hp and 500 lb-ft of torque on 87-octane gas. It was a motor that could be driven just about every day with a hydraulic-roller cam and a good carburetor, making acquisition and maintenance almost nonexistent. Like many things we do in the engine world, the results we enjoyed—while good—just weren’t satisfying anymore. We wanted more.
Holley carburetors have long been a staple in the go-fast world of high-performance motoring, whether it’s NASCAR, drag racing or on the street. Much like other performance-oriented products—perhaps even more so with a carburetor—a carburetor requires a fundamental setup and a degree of maintenance, and that’s considering you have chosen the correct-size carburetor for your application, at least to get it in the ballpark. Knowing how to adjust, maintain and even repair your Holley carburetor goes a long way toward helping to ensure that your carburetor will make optimum horsepower for a long time. Because of this, we decided to compile a few troubleshooting and repair tips for the popular 4150-series Holley carburetor, which is the series designation for Holley’s street/strip and racing carburetors.
Crankshaft trigger mechanisms have been used in racing applications for a considerable length of time. In truth, they’ve actually been in service for decades. It’s a simple known fact that one of the best ways to improve engine performance is to ensure that the ignition timing is stable. That’s the whole purpose behind such a system, and that’s why racers regularly use them.
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After recently purchasing a ’62 Thunderbird, it became obvious very quickly that the car needed a new engine. Our plan was to turn the car into a daily driver, and so, as long as we needed a new engine, we figured we’d add air conditioning to the car while we were at it. And if you really know your Ford history, you also know that the ’62 was the last model T-bird to come with a generator rather than an alternator—one more reason to consider an upgrade.
Producing horsepower requires two major ingredients, namely, air and fuel. Of course, the two must be supplied in the correct proportions and at the proper time; but improving power is a simple matter of adding airflow. Naturally, additional fuel will be required once the airflow is improved, but the first item on the horsepower priority list should always be more airflow.