Tech Articles

According to Comp Cams, although variable valve timing systems in OHV motors work extremely well, a DOHC motor offers hp and torque gains that are 25-50 percent greater than in a pushrod motor. The ability to phase the intake and exhaust lobes independently is a great calibration tool that’s only limited by a calibrator’s knowledge of how valve events impact airflow dynamics. (Image/Stephen Kim)
Tech Articles

Calibrating for the Future: Conquering the New Frontier of EFI Tuning with SAM Tech’s Jason Haynes

EFI tuning, as we know it, is over. Stick a multimeter probe in it. Gone are the days of simply setting the fuel and timing maps, then calling it good. […]

(Image/Jeff Smith)
Tech Articles

Ask Away! with Jeff Smith: Calculating and Setting Piston Ring Gap for Your Engine Build

I’m currently checking the gaps on a new set of first and second rings. I’m not building an all-out drag race motor, but have plans to be a weekend warrior. […]

Some leaf springs don’t use a reinforcement under the pin bolt. As you can see, AFCO includes it with their race leaf springs. (Image/Wayne Scraba)
Tech Articles

Racing Tech: Hooking Up Your Leaf Spring Suspension Without Traction Bars

Bolt-on traction bars for leaf spring cars have been available for what seems like forever. They work, and there are all sorts of different versions out there: slapper bars, sliding […]

(Image/GMC Media)
Tech Articles

4WD 101: A Beginner’s Guide to Four Wheeling

New 4X4 pickup trucks and SUVs are everywhere today. And many of those 4X4 buyers have zero intention of ever taking their truck off road. We suspect a lot of […]

(Image/Autobahn)
Tech Articles

Ask Away! with Jeff Smith: Money-Saving Tips for LS Swapping a ’66 Chevy II

I have a 1966 Chevy II with a 327 and a four-speed. It’s a great car because it’s light and kinda nimble for a ‘60s car. I’m considering an LS […]

Ask Away! with Jeff Smith: Can Direct Injection and E85 Live Together in Harmony?
Tech Articles

Ask Away! with Jeff Smith: Can Direct Injection and E85 Live Together in Harmony?

I drive a 2014 Corvette Stingray LT1 7 speed manual with a cold air intake and dyno tune as the only performance mods thus far. In my quest to add more […]

(Image/Holley)
Tech Articles

Ask Away! with Jeff Smith: Before Buying a New Carb to Fix Engine Stumble, Try This

I just bought a nice ’69 Dodge Charger with a 440 that I got on a really good deal because the previous owner had given up trying to make the […]

(Image/picswe.com)
Tech Articles

Ask Away! with Jeff Smith: When Troubleshooting Fuel Systems, Keep it Simple

Jeff Smith: Instead of the usual question from a reader, I thought the following scenario that a friend and I recently suffered through might be of help to car guys working […]

Ask Away! with Jeff Smith: Eliminating Wheel Hop in a ’60s Era Chevelle
Tech Articles

Ask Away! with Jeff Smith: Eliminating Wheel Hop in a ’60s Era Chevelle

I have a 1969 Chevelle 396 4-speed, 3.55:1 rear ratio, F41 Chevy suspension on air shocks. When I do a burnout I have bad wheel hop. I tried letting the […]

(Image/North Shore Classics)
Tech Articles

Ask Away! with Jeff Smith: Swapping an LS Firing Order Into a Traditional BBC or SBC Engine

I just read an article online that talked about a big block Malibu that was running an LS cam to change the timing. I have never heard of such a […]