from the editors of:
GM High Tech Performance
LOG IN / SIGN UP
GET THE MAGAZINE
tech & how to
engines & drivetrain
Chassis & Suspension
paint & body
Best of the Best
GM High Tech Performance
Increasing Gen III Block Displacement on a Budget
Feb 9, 2004
View Full Article »
VIEW FULL GALLERY
These BHJ honing plates are an excellent way to ensure repeatable honing procedures in every cylinder. In effect, the plates emulate the weight dispersion of the cylinder heads, making certain the bores remain as straight and true as possible during the process.
On the bottom side, HTC applies billet-steel main caps and secures them evenly with ARP studs and the factory torque specification.
To hold the price of the conversion down, HTC reworks the OE powdered-metal connecting rods for durability and strength. They are fitted with ARP rod bolts.
In the interest of longevity and durability, the stock LS1/LS6 rods are shot-peened and polished, and the big end is honed 0.002-inch oversize.
Upgrades include a forged-steel spiff, an HTC/Carrillo A-beam...
...and a more expensive Carrillo H-beam variant.
HTC reworks the stock LS crankshaft (right), streamlining the core, and subjecting it to an ionization process.
For $1,995, the ultimate application, HTC's E-4340 forged crank, as designed by Scott Bechtloff and Marty Cimaglia, packs more than 40 years of drag race, Winston Cup, and hot street experience.
A BHJ bolt-stretch gauge is used for properly setting up the connecting rod for resizing, obtaining the proper torque load when the bolt is installed in the engine, and monitoring the condition of the bolt while in use. Measure the length of the bolt in a relaxed (untorqued) state. Record the number. When it's time to tear the motor down, take another measurement. Anything greater than 0.001-inch stretch is reason to replace the fastener.
Budget variants includes the Speed-Pro hypereutectic flat-top pistons and OE pressed-in 0.945-inch pins. Static compression ratio with a 63cc chamber is 11.0:1.
Our piston upgrade is represented by CP/HTC dished-top forgings...
...Note the sly gas-port holes peppering the top ring land (arrows) that aid cylinder sealing by forcing the ring outward to the cylinder wall.
Mahle Motorsports offers a lightweight alternative for the HTC budget build. Though relatively new on the hot-rodding scene, Mahle has been the OE supplier to Porsche and other high-dollar imports for decades.
Thank guru Russ Hayes for this hot-off-the-forge Speed Pro piston...
...It carries PN L2621F and is available in 3.898- and 3.908-inch bore sizes.
Questions concerning the efficiency and longevity of Mahle products should be answered here. This piston was taken straight from a C5-R 427 Corvette that went the 24-hour distance at Daytona.
ARP is now producing connecting-rod bolts for the LS-series Gen III engine.
Hank relies on Speed Pro 152M main-bearing shells and PN 8-2555CP 40x2 connecting-rod inserts for all conversions.
In order for the reluctor wheel to work properly, it must be installed flat and straight on the crankshaft flange...
...A Goodson installation fixture attaches to the reluctor wheel and to the flywheel bolt hole.
Vector (HTC) harmonic balancers with 17 percent underdrive for the LS1 Camaro and Corvette (far left). The others are 7 percent underdriven for the same engines.
Stock-Appearing 1984 Drag Camaro Packs a 509ci Big-Block
As one of the world’s few auto mechanics that still manages to spin wrenches after work, Gary could not leave the 1984 drag Camaro in stock form for long.
Restomod 1964 Chevrolet Chevelle Convertible is the Perfect Business Card for Schreck’s
The beautiful silver 1964 Chevrolet Chevelle convertible came into his possession thanks to his brother Kevin, who owned the car for more than 20 years.
800-HP 2001 Chevrolet Camaro Redefines the Meaning of “SS”
Brent Schubring’s 2001 Chevrolet Camaro SS has subtle, yet devastatingly effective appearance upgrades and an unconventional induction system,
5.3L LS Small Block Build - Here Comes Modern Mouse! - Super Chevy Magazine
For a 5.3L LS Small Block Build, we've discused Danger Mouse, and Major Mouse, many manners of small-block performance. Now comes time for Modern Mouse. - Super Chevy magazine
recent how to articles
How to Install the g-Link Rear Suspension on a 1969 Camaro
Penultimate LT1, Part 1: Aiming for 600-Plus HP with a 396 Gen II
Building an Insane Supercharged LS7 / LS9 that Pushes Past 1,000 HP
How to Design and Install Your Own Custom Gauge Cluster
How We Got Our 1967 AMD Chevrolet Chevelle SS Ready for the Hot Rod Power Tour
subscribe to the magazine
Subscribe and Save 74% off the Cover Price!