Q&A

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Q&A

Mailbag: Rejuvenating an Old 454 Big Block Chevy

Q: I have a 1973 454 big block Chevy. It has a 8.5:1 compression, stock oval port cylinder heads, a Crane PowerMax camshaft, and Edelbrock Performer intake, and a Holley […]

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Q&A

Mailbag: An Easy Way to Make 500HP in an LS1-Powered 2002 Camaro Z28

Q: I want to get 450-500 horsepower out of my 2002 Chevy Camaro Z28. My car already has an 80mm BBK throttle body, a Granatelli mass airflow sensor, an SLP […]

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Q&A

Ask Away! with Jeff Smith: Best Performance Upgrades for a 283 Chevy Small Block Engine

Here’s a question you probably haven’t got before in your Ask Away! segments. I have a 0.060-over 283 that is now at 292 cubic inches. I just finished the short […]

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Q&A

Mailbag: Finding Low-End Power in a Sluggish 350-Powered 1981 Firebird

Q: I have a 1981 Pontiac Firebird with a Chevy 350 in serious need of some more low-end power! It has a Holley Dominator manifold and a 750 cfm car, […]

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Q&A

Mailbag: Curing Unwanted Vibration in a 5.0L-Powered ’66 F-100 Pickup

Q: Help! I have a 1966 Ford F-100 pickup with a transplanted 5.0L from a 1991 Mustang and the following mods: Ford Performance cam (220° duration/.498″ lift), Airflow Research CNC-ported 185 […]

This is the TBSS that we’ve used on several engines during dyno testing. We’ve outfitted it here with custom brackets to mount a Holley fuel rail. The throttle body mount is a four-bolt so there are plenty of options including Holley’s affordable Sniper 92mm unit. (Image/Jeff Smith)
Q&A

Ask Away! with Jeff Smith: Building a Performance Intake Manifold for a 5.3L LS

I’ve heard there is a really good factory LS intake manifold out there for cathedral port intakes but the friend who mentioned it didn’t know anything more than that. He […]

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Q&A

Mailbag: Performing a Drum-to-Disc Brake Conversion on a ’69 Camaro

Q: I would like to install disc brakes on all four corners of my ’69 Camaro. It’s currently equipped with drum brakes, and they’re just not doing the trick. I’m […]

With a mild cam, decent heads, and a good carburetor and headers, 375 to 400 hp should be achievable. That may not sound like much today, but it is still 1.3 hp/cubic inch, which is pretty good. (Image/Jeff Smith)
Q&A

Ask Away! with Jeff Smith: How Much Horsepower Does My Car Need for 12-Second ETs

  I would like your opinion on my ‘61 Comet 2-door wagon. It’s a car that will be used for local cruise nights and Friday night street-legal drags. My question […]

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Q&A

Mailbag: Improving ET and 60-ft. Times in a 455-Powered 1967 Pontiac GTO

Q: My 1967 GTO has a 455 Pontiac powerplant with Edelbrock 87cc heads, .030 over Ross pistons, Total Seal rings, Eagle rods, a Crower cam (int./exh. duration 248°/252° @ .050″, […]

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Q&A

Ask Away! with Jeff Smith: Troubleshooting Hot Starting Problems in a Chevy 454

I have a ’69 Camaro with a 454. I went to fill it with gas on its first run for the spring and drove it perhaps 20 miles. After stopping […]