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holes drilled in holley carburetor throttle blades

Ask Away! with Jeff Smith: Should I Drill Air Bypass Holes In All 4 Carb Throttle Blades to Improve Idle?

Recently you wrote an article that mentioned drilling holes in all four throttle blades on the Holley carb to change the blade position compared to the transfer slot. I have […]
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1966 chevy chevelle launching at a race track driven by Jeff Smith

Big Inches & Big Power: A Simulated Look at Maximizing Acceleration with Chevy Performance’s ZZ632 Big Block

The big news in Bowtie land these days is Chevrolet Performance’s monster ZZ632 tall-deck big-block crate engine that can make 1,004 hp on 93 octane gasoline. Everybody is buzzed about […]
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chevy performance transmission 6l80e

Ask Away! with Jeff Smith: Modern GM Transmission Upgrade Options for an LS-Swapped 1970 Chevy Nova

I’m looking into which late model overdrive automatic would be the best choice behind the 6.2L LS in my ’70 Nova. Chevrolet Performance has just announced availability of the 6L80E […]
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pump handles with ethanol E85 blended fuels at gas station

Ask Away! with Jeff Smith: Some Calculations & Guidelines for Blending Fuel Octanes

I came across your article on blending E85 with pump gasoline and I have a question. I have a C7 ZR1 that is un-tuned that needs 96 octane to prevent […]
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Jeff smith ttorqueing down main caps on the bottom of a v8 on an engine stand

Summit Racing Muscle Car Camshafts for Ford, Mopar, Oldsmobile & Pontiac

Nostalgia is a big part of the whole muscle car movement. The time-honored approach is to recreate a car or engine that captivated us during our formative years. Perhaps it […]
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ford contour electric fans with a dewitts radiator in a vintage chevy Chevelle

Ask Away! with Jeff Smith: Fitting an Electric Fan Conversion in a Big Block-Swapped 1966 Chevelle

I’m trying to help out a friend with a ‘66 Chevelle project. It has a big block with a six speed in it. I think it was a small block […]
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gummed up engine thermostat caused by using incorrect coolant mixture

Ask Away! with Jeff Smith: Picking the Best Antifreeze for an Older Vehicle

I have a ’90 Chevy pickup that is rarely driven but has been stored in my heated garage for several years. I have a new project that will force this […]
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electrical wiring behind a 1967 chevy chevelle gauge cluster

Ask Away! with Jeff Smith: Tracking Down a Phantom Battery Voltage Drain in a 1967 Chevy

I have a 1967 Nova that drains its battery if I leave the car sitting for more than a couple of days. I’d like to try to fix the problem […]
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man placing intake manifold on top of a small block chevy on on an engine stand

Ask Away! with Jeff Smith: How to Ensure a Good Intake Manifold Gasket Seal on a Small Block Chevy

I’m a beginner when it comes to working on engines. We plan to add an aluminum intake manifold to the 350 small block Chevy in my 1972 Chevy C-10 pickup. […]
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missing pipe plugs in lifter valley of small block chevy v8 engine

Ask Away! with Jeff Smith: Troubleshooting Low Oil Pressure on a Freshly-Built Chevy 454 Big Block

I recently built a Gen VI 454 big block Chevy street engine that came out of a late model Chevy truck. I had the local machine shop do all the […]
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