Video: Keith Dorton Tests Custom 4×2 EFI Setup Against A Carburetor

When it comes to the debate between carburetors and electronic fuel injection, you will never be able to declare one a definitive winner. At best, you can say, under a given set of circumstances one will make more power, or one will require more or less adjustment than the other. Because the fact is, for every test showing one will make more power, there’s another that will show the opposite result. To that end, Keith Dorton of Automotive Specialists had a very unique EFI system come through the shop and wanted to know if that particular system would make more or less horsepower than a traditional four-barrel Holley carburetor. It just so happens, that Dorton had just built an identical engine with a four-barrel that was slated to run on the dyno, making for a solid apples-to-apples comparison. Both engines are identical 400 cubic-inch small-block Chevrolet engines spec’d out as Dorton’s pump gas street engines. The engine package starts out with a cast-iron Dart SHP block, with four-bolt mains, to serve as a bulletproof foundation on which to build the rest of the engine. From there, a Molnar 3.75-inch-stroke forged crankshaft, made from 4340 steel is bolted into the mains wit...

Both the 13-inch MacBook Pro with Touch Bar and the 15-inch model now have current-gen processors.

Both the 13-inch MacBook Pro with Touch Bar and the 15-inch model now have current-gen processors. The smaller Pro can be outfitted with quad-core i5 and i7 CPUs, while its bigger brother can go for six-core Intel Core i7 and i9 versions. On the RAM front, the 15-inch MacBook pro can be go up to 32 GB of DDR4 RAM. This can, of course, raise power consumption, so the battery is now bigger as well. Just like RAM was doubled so was the storage capacity, that goes from 1TB to 2TB for the 13-inch MacBook Pro and from 2TB to 4TB for the 15-inch MacBook Pro. The butterfly keyboard that caused so many issues has also received improvements but, unfortunately, not on the dust-resistance front. The third-gen butterfly keyboard is quieter. 2.5mpa Bronze Gate Valve Another important upgrade is for the embedded ARM chip controlling the Touch Bar, Touch ID and Siri. The new ARM that’s also found in the iMac Pro, the T2, now lets you activate Apple’s voice assistant by simply saying “Hey Siri.” What didn’t change? Surprisingly, the price. The 13-inch MacBook Pro with Touch Bar starts at $1799, while the 13-inch MacBook Pro with Touch Bar goes for a minimum of $2399. Butterfly Valve, Water Supp...