Both the existing 4.6 and the new Coyote cranks will come from 4340 forged steel using a 3.750″ stroke and either 1.889″ or 2.000″ rod journals, which helps reducing block clearancing. The cranks will also feature center counterweights for improved strength and high RPM stability, along with an 8-bolt rear flange to offer the most compatibility with high performance flywheels and pressure plates.
These cranks are then paired with 4340 forged steel H-Beam rods and a variety of pistons to round out the stroker kit. Pistons from Arias, CP, and Mahle are available in combinations supporting 2 valve, 3 valve, or 4 valve cylinder heads. And, to top it off, compression ratios for naturally aspirated and forced induction configurations are also available. You can get the assemblies balanced by Eagle from the factory or unbalanced if you want your own machine shop to do it.
Retail prices are around $2500-$2700 depending on options.
Tilton has now released a new application, the ST-246, for the Chevrolet LS / Coyote and additional specific vehicle applications. This is a new street-style twin-disc clutch assembly, but don’t let the word “street” fool you, as this clutch is jam packed with features handed down from Tilton’s vast racing experience.
The roughly 9.7″ twin discs feature sprung hubs (in the organic material option) with an overall rating of 850ft/lbs of torque, or you can upgrade to solid hubs with a ceremetallic friction material, rated at about 1250ft/lbs of torque. The flywheel is machined from a high-wear resistance chromoly billet, with precision registration for the clutch cover.
That clutch cover is also manufactured from billet, with Tilton’s race technology in the pressure and floater plates. Featuring large, heavy-duty straps to help reduce noise (this is a “street” clutch, after all), the assembly is designed to work with OEM release bearings where possible. Otherwise, the Tilton 6000-series hydraulic release bearings can be easily used.
The ST-246 should be available from your favorite Tilton retailer, including Pegasus Auto Racing, with a retail price of $1495 — entirely reasonable for such a fully featured twin disc clutch!
Pictured here is Fuelab’s brushless screw pump with an industry standard 10-bolt flange mount configuration. This is available as a stand-alone pump assembly for drop-in use with fuel cell top plates, but also in combination with Fuelab’s 2.1- or 2.7L surge tanks.
With 6 pump models available, you can select a configuration to support up to 1250 horsepower at only 60PSI all while consuming less than 10A of current!