Engine Tech / 144 posts found

GEN III Hemi lifters

GEN III Hemi Lifter Tick Solved

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It’s no secret among engine builders and enthusiasts that hydraulic lifter and associated valvetrain issues have plagued GEN III Chrysler Hemi engines for years. Internet forums are awash with tales of engine failures, high repair bills and annoying noises often referred to as the “Hemi Tick”.
speed demon

Speed Demon’s A/Blown Fuel Streamliner Motor

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Engine builder Kenny Duttweiler's thoughtful approach to torque-managed small block LS power and rear wheel drive may soon deliver the first piston powered 450 mph speed record at Bonneville. And we just showed you how they're going to do it...

Factory 409 Fuel Injection: No Really!

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In a bid to improve power and economy, GM engineering staff undertook extensive research on fuel injection options for W-motored cars and trucks back in the day. This research was conducted in the late fifties as you will note from the accompanying GM memo...
blown small block Chevy

1290 HP, 421ci Small Block Chevy Build

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Sportsman racers have pretty much gone big league thanks to a broad performance market that offers a remarkable variety of supercharging options and supporting components. Whether carbureted or fuel injected, the responsive aftermarket has provided...

Mystery Motor Development Engineer Bill Howell Tells All

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Our first story on Chevrolet’s legendary mystery motor generated a lot of new questions and a few sour comments by desktop experts still insisting it was a revised 409 W-motor. So we decided to solicit more facts straight from the horses’ mouth. We consulted an old...
427 mystery motor

Chevrolet 427 Mystery Motor

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Most of the testing and development was done with 409ci versions. Development engineers were able to generate the required power at that displacement, but in October of ‘62 negotiations with NASCAR resulted in approval to enlarge it to 427ci to gain parity with Ford. A mad rush ensued to design longer 3.65-inch...
ARP BOLTS

Understanding Engine Fastener Quality with ARP

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To some its just nuts and bolts, but the science behind the parts plays a critical role in keeping your high performance engine and other performance components together under high stress dynamic conditions. No one understands this better than ARP...
weisco boostline rod

Wiseco’s New Boostline Connecting Rods

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Weisco's new extreme duty BoostLine connecting rods are designed for up to 2000 horsepower applications in boosted domestic V8s and an large assortment of imports as well. The rods are intended for extreme duty, highly boosted applications and...
aeromotive

Aeromotive’s New EFI to Carb Regulator

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Aeromotive’s New EFI to Carb Regulator (P/N 13220) allows any car or truck, originally equipped with a return-style EFI-powered engine, to affordably convert to a standard carburetor while retaining the full, stock EFI fuel system components...

Profiling JE Pistons for Maximum Performance

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There's a lot that goes into piston design and one of the most important aspects is the skirt design. Less drag created by the skirt in the bore equals more power. Take a look at how JE continues testing different skirt profiles for maximum power and performance..

383 Chevy: Beyond the Crate!

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Is the 383 Chevy the Most Popular Small Block Ever? That's easy to believe based on the number of rotating assemblies sold by Scat Enterprises. It's also noteworthy that the 383 originated from the performance community in the late seventies and became so popular that...

A 735hp 438ci Small-Block Ford Bullet

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This 438ci 735 HP Ford drag racing engine represents Hardcore Horsepower's unconventional, but forward-thinking effort to create a strong single four-barrel engine based on an all Windsor parts collection. The result is one bad ass...

Digitizing Combustion Chambers to Increase Engine Power

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Extracting maximum power from racing engines requires extraordinary attention to small details that may be forgotten or easily overlooked. JE Pistons offers precision chamber digitizing so the piston designer can optimize the piston to...
GST seals

One-Piece Rear Main Seals for Big Block Chevys

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Rear main seal leakage remains a problem on engines that still use 2-piece rear main seals. We all know the time honored method of offsetting the seal parting lines so they do not match the main cap to block interface...
cob ra jet

Building the 750 HP Ford Cobra Jet

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Ever wonder how carefully your Cobra Jet drag racing engine gets assembled at the factory? No doubt you've seen old newsreels with sweaty line workers ramming pistons into cylinder blocks on an endless conveyor line or...

663hp 434ci Small-Block Street Engine

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When tasked to build a 650hp+ street engine with lots of restrictions, Mike Petralia's Hardcore Horsepower, LLC in Franklin, TN crafted this 434ci beast ...

Blown Hi-Torque E85 Chevy Small Block

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The key to power for this 628 HP 383ci blown street small block was the 177-cid Roots-style Weiand supercharger combined with E85 pump gas.

How to Build Racing Engines: Guide to Torque and Horsepower

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Competition engines are designed and built to generate maximum torque and horsepower for their size and intended operating environment. Torque is the heart of the matter. Defined as...

Koul Tools Braided Hose Assembly Kits

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Koul Tools hose end assembly kits have been on the market for some time, but its amazing how many people still don't take advantage of them ...

Recognizing the Protection of Motorsports Act of 2016 (RPM Act)

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Earl’s New Vapor Guard Hose and Fittings

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Earl's new Vapor Guard hose and hose ends provide a complete, economical solution that virtually eliminates fuel permeation issues common with...
383 Chevy

Why Johnson Hydraulic Roller Lifters Belong in Your Engine

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Johnson Lifters wants to be your valve lifter source.  A primary supplier with  top tier manufacturing capabilities, the 90 year old company functions seamlessly within the high stress, low tolerance OEM environment where quality control inspections are mandatory and frequent. An essential part of Johnson Lifter’s quality control program is identifying and solving common lifter issues. In particular, hydraulic valve lifters have long suffered the notion that they are no good for performance use, but that is far from accurate.   Johnson puts a check mark on that fallacy and points to the success of Chevrolet’s ultra high performance COPO […]

1969 Z/28 Canted Valve 302

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An in depth look at a one-off all aluminum canted valve, crossram inducted Chevrolet small block evaluated for the '69 Z/28. A glimpse of something so unique and bad ass for its day...
CNC Dart Big Chief Chamber

How To Build Racing Engines: Cylinder Heads

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When selecting a cylinder head for a particular application it is important to closely match the desired RPM range based on port dimensions that include port length, cross section, and mid- and high-range flow rates...
565 cubic inch BBC

565ci Dart BBC Race Build

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Our sample engine build is a 565-ci big-block Chevy based around a Dart Big M cylinder block and Dart Big Chief Pro 1 aluminum cylinder heads. Following the step-by-step procedures is designed to simplify the mating of all the important com­ponents in the engine...