Build, text and photos by Mike Mavrigian This final article installment covers the completion of the 408 LS build, along with the engine dyno results. Our radical-looking baby pulled a respectable 670.5 HP at 6500 rpm and 581/7 lb-ft of torque at 4900 rpm.
Build, text and photos by Mike Mavrigian Part 3 of the 408 LS series continues the build, discussing areas including sensors, oil pump, cylinder heads, valvetrain, front cover, water pump and crank damper installations. In Part 4 of the series, we’ll conclude assembly and provide a peak at our dyno [...]
Build, text and photos by Mike Mavrigian BLOCK PLUGS Using all new GM plugs, I installed the four threaded water jacket and oil plugs on the outside of the block (three steel 16mm plugs and one brass 30mm plug). These plugs feature straight metric threads. No NPT threads exist on the OE block. [...]
Build, photos and text by Mike Mavrigian This build features a GM LS platform, bored and stroked to 408 CID, with a 4.0305” bore and 4.000” stroke. A few of the notable elements include adapting Gen 1 smallblock Chevy valve covers to LS heads and a conversion to carburetion, this time using a [...]
Diamond has created new domed drag racing pistons for two popular Brodix big-block Chevrolet cylinder heads: the NRC-SR20 and the Head Hunter.
JE Pistons has announced that their advanced manufacturing center will relocate from its current southern California location to a new facility in Mentor, Ohio (east of Cleveland). According to JE, “The decision to relocate is part of an ongoing effort to be closer to the majority of JE customers, improve delivery and expand capabilities.”
MAHLE’S GM LS3/L92 4.100″ stroke engine PowerPak piston assemblies are available in both high and low compression applications. Machined from MAHLE’s exclusive stronger, lighter, low drag slipper skirt forgings, each of MAHLE’s PowerPak pistons are made in America. Additionally, the ring grooves are machined on MAHLE-manufactured machinery resulting in the flattest, best sealing ring grooves [...]
Build, text and photos by Mike Mavrigian Note: This engine, as well as all of our engine projects, is designed, test-fit and assembled by Mike Mavrigian’s Birchwood Automotive facility in Creston, OH. Now that the block, oil pan, valley cover plate and timing cover have been painted, we can begin final assembly. [...]
Ross Racing Engines’ Tony Lombardi cut the valve reliefs using an end mill and his adjustable piston vise. Build, text and photos by Mike Mavrigian The Pontiac bigblock build (starting with a 455 block and boring/stroking to 501 CID) is progressing. I apologize for the time delay, but this build has been [...]
MAHLE Clevite Inc. introduced 62 new part numbers in November for various types of bearings, cylinder components, filters, gaskets, piston rings and turbochargers. The part numbers are available for a range of light vehicle and heavy duty applications.