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PRODUCT SPOTLIGHT: The ProFlex DXI by Advanced Fuel Dynamics

If you’ve got a 2020+ GM V8 truck or SUV and you’re not running E85 yet, you’re leaving power and money on the table. Enter the ProFlex DXI—the easiest, fastest, and flat-out smartest way to slap flex fuel capability onto your rig. No tuning, no ECU unlocks, no headaches—just more horsepower and lower fuel costs in about 15 minutes.

SEMA 2024 in Focus

Dive into our exclusive coverage recorded LIVE from the SEMA 2024 show floor. From groundbreaking performance enhancements to next-generation customization tools, each moment is brimming with ideas and inspiration from the pros who are shaping the future of automotive innovation. Whether you’re a seasoned professional or a car enthusiast eager to discover the next big thing, The Auto Builder’s live showcase offers an unrivaled experience. Witness the passion, creativity, and expertise that make SEMA the pinnacle of automotive excellence. Catch the highlights now and immerse yourself in the excitement of automotive innovation like never before!

All-In-One Conversions

The lines of ’55-’57 Chevys are almost sacrosanct. They haven’t been modified or changed over the years with very good results. There have been a couple of exceptions, but by and large, chopped tops, restyled fenders and other modifications that alter their original lines don’t come off looking real good. The problem is in the proportions. We’re not sure if it’s because the factory got them so perfect right out of the gate, or if it’s that most have been left alone over the last 50 years, so a chopped top looks strange. Whatever the reason, the classic “greenhouse” roofline, long fenders and slab sides all work very well together.

PACKED WITH POTENTIAL

The Power Programmer is designed so that once the parameters are established and loaded, the unit is pulled and the program remains in the onboard computer until you elect to remove it. The HyperPAC is different; this unit stays in place. In addition to the three stages of performance tuning—the HyperPAC has all of the performance programming benefits of the Power Programmer—it also has diagnostics; an engine monitor with a complete gauge display; a dynamometer, which includes such items such as a horsepower graph; and our favorite, a dragstrip program. This program actually monitors real-time engine operating conditions, has a Christmas tree start, displays a timeslip and will provide you with “magazine-type road test” acceleration times in 10-mile increments. It will record and display important engine operating conditions throughout the run and will display drive wheel horsepower versus vehicle speed after each run—in both table and graph formats.

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COOL BLAST

Adding a nitrous spray bar to an intercooler is a proven way to lower the intake air temps and consequently give a more dense charge to the combustion chamber for more horsepower. We’ve been seeing more and more intercooler spray bars popping up on both performance and show-n-go cars.

150 TUNER TIPS

Have you ever looked at another enthusiast’s ride and noticed something unique, yet very clever, that made the vehicle stand out or perform better and thought, “Why didn’t I think of that?” Well, we’ve done some of the homework, legwork and research to provide you with a similar advantage. We scoured the tuning shops and interrogated the pros to find out what tips they have done that our readers could apply to their own vehicles.

LIGHTEN UP

The new E46 BMW M3 comes equipped with some serious OE HID headlights, but what if you’re still not happy? You want something different; you want to add some spice to your headlight setup. Well, this story is just for you.

THE SMART CHARGER

If you are going to connect anything automatic to your car, especially when dealing with electricity, lead and acid, you owe it to yourself to do a bit more research rather than pulling just any super-discounted, off-the-shelf item and connecting it to something as potentially volatile as a lead-acid battery. But we have, haven’t we?

ELECTRIFIED

If you are like many of us who have at one time or another opted for a less expensive vehicle to build, then this how-to will be of interest to you. At the cost of certain features or creature comfort conveniences—mundane items like power windows and locks—we often begin with what may be considered a strippo model or a basic transportation car that is … well, available. These cars can, after all, make for a great foundation that can easily be personalized, just like we are doing here.

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