Photos Courtesy of Triangle Speed Shop and Race Pages
The Ford Motor Company made a bold move in 1996 when it ditched the traditional 5.0 High Output engine in favor of the 4.6L engine from its Modular engine family. One of the most notable changes was in the oiling system, using a crank-driven gerotor setup for an oil pump assembly. It is a unique setup that is effective in stock engines but falls short in high-performance applications, thanks to the combination of powdered metal gears and the harmonics from the crankshaft. The results are shattered oil pump gears, which can lead to severe engine damage. The Ford engineers weren’t concerned with adding blowers or turbochargers, so there is a combination of cost-control and manufacturing goals with the OEM oil pump assembly instead of being bulletproof for use in our world. Luckily, there are plenty of aftermarket companies who offer billet gears for our hardcore intentions.
Twenty-one years after the first Modular-equipped Mustang rolled off the assembly line, there is still a need for high-quality oil pump gear-sets and Triangle Speed Shop has all iterations of the 4.6, 5.4, and the 5.0 Coyote engines covered in both billet oil pump gears and complete oil pump assemblies. All of the gears are chromoly steel billet and the materials are US-made for the highest quality and supply control. A computer controlled precision surface ground ensures the gears are perfectly cut. Once the gears are cut, there is a proprietary heat treatment applied for the perfect balance of strength and wear resistance. In addition to quality material and treatment, the tolerances are held to +/- .0005-inches. Not only are each and every gear set’s hardness verified on a Rockwell Scale, all of the parts are de-burred and finished by hand. The gear sets are grouped together with its mate and each housing is checked for proper gear-to-housing clearances.
If you were to talk to most Mustang speed shops, they would recommend adding billet oil pump gears during the initial installation of a supercharger kit on 2011-2017 Mustangs. Sure, it adds more installation time to the bill, but the elimination of an oil pump failure is well worth the investment. Installing an aftermarket Triangle Speed Shop oil pump and/or gears requires the engine’s front cover to come off. Some people might balk at the idea; just know that for the past few years, NMRA tech officials conducted billet oil pump gear swaps in the G-Force Racing Transmission Coyote Stock class at NMRA events. The sealed factory engines came standard with the factory powered metal gears and the racers were allowed to switch over to Ford Performance oil pumps, with billet gears, while tech officials kept an eye on them during the process during the race weekend. The switch, on average, only took a couple of hours.
The latest Race Pages in-house project car, dubbed #PureEvil, features a 5.2L engine with a Shelby GT350 engine block and cylinder head setup, built by Rich Groh Racing. We are using a Boss 302 steel crankshaft rather than the flat-plane crank that the mainstream automotive media has drooled over. This engine also uses the heavier 2011-2014 timing chains due to the 9,600-plus rpm engine speeds. We are using Triangle Speed Shop’s billet crank sprocket along with their oil pump assembly with their billet gears that are specific to the 2011-2014 generation due to the chains from the same generation.
The GT350 engine normally uses a different oil pump setup because of a special road racing oil pan, but we ditched it in favor of an aluminum pan from Moroso. That meant we needed the Coyote oil pump assembly. There are a few advantages to going to a billet crank sprocket in addition to the billet oil pump gears, the stock sprocket has been known to fail in some applications so it is added insurance for durability. The other is accurate cam timing thanks to the sturdier gear, which eliminates deflection as this engine will be spun into the stratosphere.
#PureEvil has run a best of 9.03 elapsed time and a high speed of 152 mph as it set the mark as the quickest and fastest naturally aspirated Coyote-powered vehicle.
Rich Groh Racing
Triangle Speed Shop