Tag: LS

408 LS PART 4: COMPLETED AND DYNO

408 LS PART 4: COMPLETED AND DYNO

      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.  

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408 LS, PART 3

408 LS, PART 3

    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 [...]

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PROJECT 408 LS PART 2

PROJECT 408 LS PART 2

  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. [...]

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PROJECT 408 LS, PART 1

PROJECT 408 LS, PART 1

  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 [...]

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ENGINES DISPLAYED AT HOT ROD RESTORATION BOOTH

ENGINES DISPLAYED AT HOT ROD RESTORATION BOOTH

Three custom engines will be on display at the Hot Rod & Restoration booth at the 2013 trade show in Indianapolis, March 14-16. The engines, built by Hot Rod & Restoration contributing tech writer Mike Mavrigian, include three distinctly different examples that befit the street rod and resto market.  

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NEW LSX HEAD GASKETS

NEW LSX HEAD GASKETS

Fel-Pro has expanded its range of MLS cylinder head gaskets for the GM LSX family of competition engines. Each of the new PermaTorque MLS head gaskets features Fel-Pro’s exclusive LaserWeld stopper layer technology currently in use in NASCAR, NHRA and IHRA competition.

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NEW MAHLE PS PISTONS

NEW MAHLE PS PISTONS

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 [...]

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RETRO LS, PART 5

RETRO LS, PART 5

  THE FINAL ASSEMBLY   by Mike Mavrigian Our intent with this build is to illustrate how you can take advantage of current LS (mechanical) technology, and still create a somewhat old school traditional appearance, grabbing in the range of 450 HP, all without breaking the bank. In terms of exterior finish, we intentionally “relaxed” [...]

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PROJECT ENGINES TO BE DISPLAYED AT HOT ROD & RESTORATION SHOW

PROJECT ENGINES TO BE DISPLAYED AT HOT ROD & RESTORATION SHOW

The Pontiac is being completed today, getting ready for display. . Both current project engines, including the “Retro” LS engine and the Pontiac 455 will be on display at the upcoming Hot Rod & Restoration show in Indianapolis. This year’s show is held at the Lucas Stadium complex, adjacent to the Indianapolis Convention Center, March [...]

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LS RETRO BUILD, PART 4

LS RETRO BUILD, PART 4

This installment in our LS 5.3L “retro build” covers installation of our hydraulic roller lifters, cylinder heads, pushrods and rocker arms, completing the valvetrain. . Build, text and photos by Mike Mavrigian . CYLINDER HEADS While there’s nothing to complain about with the original casting number 862 aluminum heads (GM P/N 12559862), making them flow [...]

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