For the popular 2300 Ford overhead-cam race engine, Diamond has created two new series of pistons: a low-drag two-ring design and a conventional three-ring design. Both are constructed to the specifications of Durham Racing and both are available exclusively from them. Durham Racing is headed by Johnny Durham whose engine-building shop, established in the early [...]
Diamond’s new, comprehensive range of nitrous pistons comes with all the bells and whistles.
Obviously, they are not designed to compete on price with entry-level conventional pistons. However, for those who need an entry-level piston today but may be considering adding nitrous or forced induction later, choosing the nitrous piston now might be the wiser plan.
DIAMOND’S TYPE 3 HARD-COAT ANODIZED PISTONS ARE CRITICAL FOR ENGINES WITH POWER ADDERS—STREET ENGINES IN PARTICULAR
Imagine the surreal heat and cylinder pressure generated by a Top Fuel engine on a 1000-foot pass. Though the violence to the pistons isn’t as concentrated inside a street engine with a power adder, it is constant and just as [...]
ENGINE BUILDERS REJOICE! DIAMOND PISTON’S NEW COMBUSTION CHAMBER MOLD KIT—if you alter the combustion chamber, altering the piston dome to suit is simple
CUSTOM CHAMBER MODELING KIT
Diamond’s modeling kit provides all materials needed to make your own custom chamber model. This allows Diamond to design and make custom-dome pistons to precisely fit your custom head chambers.
Diamond [...]
Diamond Pistons has launched a new series of high-domed, high compression pistons for Ford Windsor 5.0 and 351 engines equipped with Trick Flow Twisted Wedge cylinder heads. Developed for weekend warriors and budget bracket racers with either naturally aspirated oe nitrous engines, the new slugs are supplied with 4130 wrist pins and spiral locks, or [...]
CARBURETOR/FUEL PLUMBING
Our big-gulp carb is Holley’s Ultra Dominator (P/N 0-80673), an 1,150 cfm race carb that features billet metering blocks, three-circuit metering, mechanical secondaries and oversized sight windows for easy float adjustment. Recommended fuel pressure is 5-7.5 psi. The anodized billet metering blocks feature changeable idle feed restrictors for easier tuning of the idle system [...]
Custom pistons are available in any configuration, but knowing what’s needed to order them requires careful measurement and sound decisions.
Once the data sheet is accurately completed, your order begins to forge blank slugs.
Initial machining begins with pin bore placement.
Here the rod small end passage is machined, based on your reported small end width.
With ring grooves [...]
MAKE A MOLD
Simone also told me that Diamond Racing now offers a very cool epoxy chamber mold kit that can absolutely save the day in terms of what your application demands. The kit (an A-B pair of epoxy cans, a mixing stick, nitrile gloves and a spark plug hole plug) it sells for a measly [...]
ORDERING CUSTOM PISTONS
When an off-the-shelf slug won’t do, you need to turn to the custom boys.
by Mike Mavrigian
photos by author
Need a set of custom slugs to work with your new heads and your bore/stroke combo? A ton of info is required before a piston manufacturer can begin to execute your order. By the very nature [...]
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 0.900″ extended flange w/BBC bolt pattern
Intake flow………………520cfm [...]
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