1972 Dodge Dart Custom Best Machine 900hp Engine

When it comes to building an engine, when is enough really enough? Well, if you ask Wes Hudgins of Goodyear, Arizona, he'll probably tell you that you can never have enough when it comes to horsepower. Wes has this car that he likes to make go really quick, and when it came time for motorvation, he contacted Best Machine in Shelby Township, Michigan. While speaking with the guys there, they came up with a game plan for a really stout combination. Now, this wasn't going to be a run-of-the-mill stock-blocked engine that could kick it on the local boulevard; this was going to be nothing but pure adrenaline for close to 8 seconds.

Building an engine that displaces horsepower of over 915 or so, and a torque reading of 731 lb-ft, means you better know what you're doing when it comes to choosing parts. Let's face it, stock rods and pistons ain't gonna cut it. The list of parts chosen was definitely top-shelf, which left the durability issues up to the assembly process. I think we can all agree, simply throwing all the parts in a pile and hoping it all goes together isn't going to happen. paying close attention to the small details is what makes a good engine great.

The Foundation
Since this engine isn't going to be making many trips to the local Piggly Wiggly, a more race-oriented race block could be used. The Keith Black aluminum 400 Wedge low-deck block is a strong, lightweight block featuring full water jackets, removable cylinder sleeves, stronger mains, and a larger bore/stroke capability. The block comes fully machined with main caps, studs, and cam bearings installed, plus all relevant hardware. Our version came with a deck height of 9.980 inches. Building the rotating assembly began with a Callies 4.250-inch Magnum Plus crankshaft that had been gun drilled to reduce weight, and is designed with Chevy rod journals. Say what you will, connecting rods for this application are readily available in this journal size, and the smaller journal size makes the crank a little lighter. From the crankshaft, GRP connecting rods, measuring 6.58 inches, are then connected to the CP custom piston that brings the final squeeze ratio to 15.0:1-definitely not pump-gas territory. The camshaft is another custom piece by Straightline Performance. The seriously big bulges measure a healthy 280/295 degrees of duration at .050-inch valve lift, and .818/.819-inches of valve lift. The 113-inch lobe separation would help with the idle quality, as well. Idle quality, who are we kidding? Connecting the cam to the crankshaft would be a Jesel beltdrive keeping it all under control.

It's The Tops
Heads make power! No one can argue with that, and to make sure there was enough power made, a set of Brodix B-1 heads was chosen. Now, Brodix makes a really good head right out of the box, but these were given to Dwayne Porter, who cleaned up the bowls, gasket matched the intake ports, and polished the chambers. Afterwards, Best Machine touched them with a Serdi valve job, using custom cutters designed by Best Machine. Special provisions were also made to the heads to accommodate additional cooling lines added under the center exhaust ports to help cooling. This extra cooling was deemed necessary for when the 350hp NX Pro Shark Fogger is applied. To finish the heads, Stealth titanium valves, measuring 2.300/1.780 inches, are actuated by the T&D rocker arms and Manton 71/416-inch pushrods. Feeding the monster a metered dose of juice is a Pro Systems 1250 Dominator perched on an unported Brodix intake.

The Results
We can blow a lot of hot air, and tell you the what, where, and how of what we did, but unless we show you the what, where, and how of what we did, it's just that-hot air. So follow along, as we show you just what it took to build enough horsepower to make a '72 Dodge Dart travel the quarter-mile in 8 seconds.

Chart 1
B-1 Head Flow
Super Flow 600 measured at 28 inches of water