Race Rings Reducing friction and weight while maintaining needed sealing presents challenges to pro race engine builders. by Mike Mavrigian Evolutionary and revolutionary changes are constantly taking place with regard to pro-racing piston ring applications. To gain a bit of insight in terms of what’s happening at the moment, I spoke to two leading sources, [...]
ANTI-FRICTION AND OIL MANAGEMENT COATINGS Anti-friction coatings (which would be applied to components such as bearings and piston skirts) not only provide a much lower coefficient of friction (when and if physical contact between two moving surfaces takes place), but also serve to retain surface oil between moving parts, which is exactly what you’d want [...]
The valve reliefs were cut with precision. The intake pockets are 0.270″ and exhaust pockets are 0.064″. Notice that the pin bore location encroaches into the oil ring groove. Diamond supplied a set of support rails that are installed prior to the oil ring package. These provide footprint support for the oil ring package. Scott [...]
TOP FUEL RINGS & BEARINGS It’s simply amazing that any components are able to withstand this nightmarish environment. by Mike Mavrigian A Dykes top ring from a Top Fuel engine. (photo by author) Note the missing plasma moly that was blown off of this top ring. This ring (and its companion set) saw a mere [...]
Dart 11-Degree Big Chief Cylinder Head Specs P/N………………………18500000 Material…………………355T6 aluminum alloy Comb. Chambers……….56cc (70cc also available) Intake valve dia…………2.470″ Intake port dim. …………1.815″ x 2.725″ w/3/4″ radius Intake port volume………FP CNC – 497cc Intake port location……..Raised 1.500″ spread ports Exhaust valve dia………1.800″ Exhaust port volume……185cc Exhaust port dim………..2.020″w x 1.780″h Exhaust port location……angled & raised [...]
We build a big, big block drag mill just for the sheer hell of it. by Mike Mavrigian photos by author Some folks love to claim that bigger is not always better. While that may be true in some cases, let’s face it…when the conversation turns to displacement, well, bigger cain’t never hurt. After all, [...]
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