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4/7 SWAP

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 CARB TUNING

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.

MAKING GAS

Alternative-fuel sources and hybrid cars are all the rage today. Everyone from major automakers to backyard inventors is pursuing alternative fuels and energy sources. While the ultimate goal is generally to eliminate dependence on foreign oil, for hot rodders there is also the desire to invent and create a better-performing engine.

Scrap Yard Binders

Since we don’t really have to search for vintage parts anymore, gone are the days of scouring the local “Pick-a-Part” in search for that illusive part that will interchange or convert your muscle car to bucket seats, tilt steering, A/C or some suspension upgrade. But there was a day when you and a rodding buddy could venture to your favorite junkyard and come home with a whole truckload of cool vintage goodies that would aid you in your rebuild, all in the span of a day.
Well, those days aren’t completely gone. While at the local wrecking yard looking for any useful hot rod parts, we stumbled across another enthusiast, Sean Rievley, who is in the progress of upgrading his ’71 Chevelle chassis

Firewall Mayhem

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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THE HYDROGEN HIGHBOY

Enter Carl Casper, a man best known for building custom cars and promoting his huge custom car show every year in Louisville, Kentucky. Casper has long been a self-thinker and innovator with plenty of experience under his belt, and he was intrigued with the concept of alternative fuels, hydrogen in particular. During our conversation with Casper, he summed it when he said, “I feel many of the solutions will come out of the car guys. I want the mechanical wizards who have taken street rodding and auto racing to the highest levels imaginable to start putting their creativity into alternative-energy systems. I’m putting my money on them. Everyone seems to be waiting for the big corporations to pull us out of this energy crisis, and they tend to forget that from the very beginning of time it’s often the little guy with a shop behind his house who creates the next great idea or invention of our time.”

GOING PRO

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.

Are You Master of Your Terrain?

Ok, you’ve lifted your rig so you can put those big tires on, and you take it out on it’s maiden wheelin’ trip. The first thing you notice is how the terrain seems to guide the tires while fighting your biceps. If this sounds familiar then you probably have manual steering. Many of the older rigs on the trail only came from the factory with a manual steering box. There are several options to remedy the manual steering blues. Upgrading to a power steering setup is the most basic route, then there are a number of companies specializing in hydraulic ram setups. There are also many combinations using common power steering boxes in addition to a hydraulic ram assist. With the vast variety of power steering system components available, the possibilities are quite endless.

Keeping Your Cool

Even though we all dream of blasting through the desert at 130-MPH like Robby Gordon, most of our 4×4 adventures take place at a much more reasonable pace. Unfortunately for our engines crawling along a boulder strewn dry river bed or climbing a goat trail through a mountain pass does not always allow enough airflow to keep our engines cool with a belt driven mechanical fan. Belt driven fans are designed to keep your engine cool when traveling down a street or highway not while crushing boulders at 3-MPH and 1,500-RPM. So what can we do to keep our rigs from boiling over this summer? Follow along with us as we install a pair of 11-inch electronic cooling fans along with a programmable fan controller both from SPAL USA.

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