Q&A

Q&A / Tech

Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4×4

I’ve followed your stories and career for years. I know the internet has changed most everything we do but I miss seeing Car Craft in print. One tech question I […]

Q&A

Ask Away with Jeff Smith: Running a Single or Dual Plane Intake Manifold

I keep seeing all kinds of information on the best intake manifold for a carburetor and all the opinions just make this even more difficult. I have a 5.0L small-block […]

Q&A / Tech

Ask Away with Jeff Smith: Dialing in a Cleveland

I’m trying to dial in my old Ford friend of 45 years, a 1972 Ford Mustang with a 351 Cleveland with 2-barrel heads. The engine has a Crane hydraulic roller […]

Q&A / Tech

Ask Away with Jeff Smith: Is 10:1 Compression Compatible with 91 Octane Fuel?

I want to build a 350 Chevy with iron heads and a 10.0:1 compression ratio. Will that work on 91 octane pump premium fuel? H.C. Seemingly simple questions like this […]

Q&A

Mailbag: Does My High-Performance Engine Need a High-Volume Oil Pump?

Q: I’m rebuilding a Dodge 360 engine for street performance applications. How do I know if I need a high volume oil pump? A: A stock volume oil pump is […]

GM Differential Ring Pinion Size Measurements
Q&A / Tech

Mailbag: How to Identify GM Differential Carriers

Q: I have a 1970 El Camino with a 12-bolt differential and 4.11:1 ring and pinion. I’m not sure if it’s the original gear ratio, but I want to change […]

Q&A / Tech

Mailbag: How Much Compression is Too Much?

Q: I have a 383 stroker engine that’s making 525 horsepower and 450 foot-pounds of torque. I’m running a Trick Flow Super 23® top-end engine kit with a 9.1:1 compression […]

Q&A / Tech / Tech Projects

Ask Away! with Jeff Smith: How a Mismatched Head Gasket Can Cause Big Problems!

I’ve got a 400 cubic small block Chevy that I had the machine shop bore to 4.155. I’m collecting parts to put it back together and used some of my […]

Q&A / Tech

Mailbag: How to Bring a Long-Idle Vehicle Back to Life

Q. I have a 1987 Monte Carlo SS with a 305 HO engine and an automatic transmission. Unfortunately, it’s been stored in my garage for over a decade. I would love to […]

Mailbag: Understanding Optimal Cruising RPM and its Impact on Engine Performance
Q&A

Mailbag: Understanding Optimal Cruising RPM and its Impact on Engine Performance

Q: What is the ideal cruising RPM, and why is it important? A: Cruising rpm—that is, the speed at which your engine’s crankshaft rotates at a given sustained speed—has an […]