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Jeff Smith

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small block chevy in engine bay of an amc rambler classic

Ask Away! with Jeff Smith: Using E85 or Octane Boosters in a High-Compression 283 SBC with a Cruising-Speed Stumble

I am an old school pepper tree mechanic, and not quite in tune with 12:1 compression ratio small block Chevys. I have a 1962 Rambler Classic with a 283 with 12:1 […]
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close up of an engine vacuum dial gauge face

Ask Away! with Jeff Smith: What Does “Inches of Mercury” Mean & How Does It Measure Vacuum?

Can you give me a short explanation of what inches of mercury is and how it is measures manifold vacuum? I just don’t understand it. Thanks! J.J. This can sometimes […]
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edelbrock avs2 series carburetor on white table top

Ask Away! with Jeff Smith: Adjustments for an Edelbrock AVS2 Carburetor with a Slight Hesitation

I recently bought one of those new 750 cfm Edelbrock AVS2 carburetors for my 1969 Satellite with a 383 V8. It runs pretty good but it has a slight hesitation […]
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1980 Camaro Z28

Ask Away! with Jeff Smith: Improving Fuel Economy in a Quadrajet-Equipped 350 Chevy Camaro Z28

I have a 1980 Chevy Camaro Z28 that’s in really good shape with the stock 350 and the original Quadrajet carburetor. The car is all stock. Instead of making more […]
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man removing valve springs from a cylinder head using a compressor tool

Video: Tips to Removing Valve Springs While the Cylinder Heads are Still on the Engine

Replacing valve springs is absolutely one of those jobs where you need the right tools to do it properly. But beyond that, there is a technique involved and watching the […]
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ls6 intake manifold on a workbench

Ask Away! with Jeff Smith: Getting to 400+ Horsepower in an LS1-Equipped Fourth-Gen Camaro

I have a 2000 fourth-gen Camaro with an LS1 and a six-speed that I just bought. The car runs great—but now that I’ve had it for awhile, I’d like to […]
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lst cam shaft test dyno chart

Ask Away! with Jeff Smith: A Good Camshaft Suggestion for a Modified Chevy 383 Stroker LS6 Engine

I have a 5.7L LS6 engine out of a 2005 Caddy CTS-V that dropped an intake valve with just over 50K on the odometer. The damage was not too extensive (no […]
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a close up shot of the front fgrille of an oldmsobile f85 parked at summit racing near akron ohio

Ask Away! with Jeff Smith: Troubleshooting Alternator & Electrical Gremlins in a Vintage Oldsmobile

I have a weird problem that you might be able to help me with. I have an Olds F-85 that I upgraded to a later model internally-regulated alternator. This alternator […]
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jeff smith filling an ls engine with oil prior to initial fire up

Video: Tricks & Tools to Pressure Lube a Modern Engine

Recently, we ran an article on knowing the difference between oil pump primers. While the story focused on earlier V8s with distributor-driven oil pumps, we also touched briefly on modern […]
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trick flow cylinder head for a small block chevy v8

Ask Away! with Jeff Smith: Steam Holes & Cylinder Heads for a Small Block Chevy 400

I’d like to build a Chevy 400 to drop in my short box pickup. The goal is a fun street truck, no track time, more likely to hit the highway […]
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