Our build is done. See the end of this article for several tasty photos of the finished engine, followed by a complete list of the participating manufacturers.
FINAL ASSEMBLY OF OUR
NASTY LITTLE DART 427W
OUR ONE TRICK PONY IS DONE.
WE’RE READY FOR THE DYNO RUN.
Engine build, text and photos by Mike Mavrigian
INTAKE MANIFOLD
Since our Trick Flow heads feature [...]
by Mike Mavrigian
Build/assembly and all photos by author
Our Lunati roller cam features 0.544″ valve lift at intake and 0.560″ at exhaust, with duration of 232 intake and 242 exhaust. Centerline is 108 intake and 116 exhaust.
CAMSHAFT AND TIMING
Dart thoughtfully provided anti-friction-coated cam bearings with their block. Each bearing is etched with a part number, and [...]
Following years of extensive R&D, the engineering team at ARP® has developed a revolutionary new high performance fastener assembly lubricant that is superior to commonly used oil, moly and other lubes. ARP Ultra-Torque® allows builders to torque fasteners within 5% of their required preload on the first “pull,” virtually eliminating “preload scatter,” and ensures exacting [...]
One of the newest releases from HP Books is High Performance Fasteners & Plumbing, written by Mike Mavrigian. This 170-page book provides detailed, yet easy-to-read technical information on understanding all types of performance fasteners (bolts, nuts, screws, rivets, clamps, etc.) and performance plumbing for fuel, brake, oil and coolant hose, fittings, tubes, etc.
PROJECT LS2, PART 4
This has proven to be a fairly easy build. The LS series-both Gen III and IV-shows definite promise.
by Mike Mavrigian
all photos by author
Our LS is now ready for induction and ignition.At this point, our LS2 is a complete longblock. Here, we’ll cover a number of subjects leading up to our current build [...]
continued from Part 1
CYCLIC FATIGUE PROTECTION
Whether measured by stretch or tightened by torque, rod bolts MUST be installed with the proper amount of preload (bolt stretch) in order to provide proper clamping force. If a rod bolt is installed without sufficient preload, every revolution of the crankshaft will cause a separation between the connecting rod [...]
CRITICAL: BUY QUALITY
Performance aftermarket fastener manufacturers offer much higher tensile strength fasteners that are specifically designed for racing applications. ARP, for example, offers threaded fasteners that boast 170,000 psi, 190,000 psi and 220,000 psi. In other words, instead of hitting the local hardware store or Internet source for imported who-knows-what-or-where-they-came-from fasteners, stick with reputable U.S. [...]
METRIC NUT GRADES
The grade system for nuts is a number that represents 1/10 of the specified proof load stress (in kgf/mm2). The proof load stress corresponds to the minimum tensile strength of the highest grade bolt that can be used with that nut.
GRADE CAUTION
Although it is common for Grade 5 bolts to feature three slash [...]
THREADED FASTENER GRADES
by Mike Mavrigian
photos by author
Grade 5 steel bolt. Three radial line marks. Theoretically, this bolt will feature a 120,000 psi minimum tensile strength.
The grade label specifies the minimum strength properties the fastener is intended to meet. Industrial fasteners are also marked with a label that identifies the maker of the fastener. Grade markings [...]
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