Q&A

Engine & Exhaust / Q&A / Tech

Ask Away! with Jeff Smith: Lobe Separation Angle (LSA) Specs—What Does a Plus Sign (+) Mean?

I’ve been looking at cam specs for the Summit Racing Pro LS Truck camshafts and I have a question. I’ve noticed that many of the specs now list the lobe […]

Driveline / Engine & Exhaust / Q&A

Ask Away! with Jeff Smith: Advice on Swapping a 4.8L LR4 LS Engine & 4L60E Trans into a 1969 Firebird

I have a 1969 Firebird that I’m swapping in a 2002 LR4 4.8L LS engine from a GMC Sierra pickup. I have the mechanical swap parts for mounting the engine […]

Engine & Exhaust / Q&A

Ask Away! with Jeff Smith: Should I Hone the Cylinder Walls on a 5.3L LS with 200K Miles Before My Rebuild?

I have a used 5.3L LS truck engine that I’d like to swap into an earlier Chevy pickup. The engine was running when it was pulled out of a wrecked […]

Ignition & Electrical / Q&A

Ask Away! with Jeff Smith: Why is There Wet Engine Oil on My Spark Plug Threads?

I have a 355ci small block Chevy that was rebuilt about a year ago and we included a set of Edelbrock aluminum heads, a Comp flat tappet cam, and an […]

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Ignition & Electrical / Q&A

Mailbag: Why Does My New Vehicle’s Alternator Output Voltage Keep Fluctuating?

Q. I recently installed an aftermarket USB port with a digital voltage display in my newer Ford truck. I noticed my battery voltage varies significantly, between 12.9 and 14.1 volts, […]

Engine & Exhaust / Q&A

Ask Away! with Jeff Smith: Some Good, Mild Performance Upgrades to a Direct-Injection Chevy Gen. V 5.3L LT Engine

I am rebuilding a 2014 L83 5.3L engine for my Silverado pickup and I’m considering making some changes to improve the performance slightly. I have looked into adding larger fuel […]

Engine & Exhaust / Q&A

Ask Away! with Jeff Smith: Should I Put a Small Block or Big Block Engine in My 1974 Chevy Truck?

I am trying to decide on an engine for my 1974 Chevy project truck. The truck has a 350ci small block and a TH350 but I am thinking of going […]

Ignition & Electrical / Q&A

Ask Away! with Jeff Smith: How to Connect a GM CS-130D Style Alternator in Place of an Original CS130

I have been looking for how to wire a CS-130D alternator in place of my CS-130. I came across your article on how to hook up a new alternator in […]

Induction / Q&A

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 […]

Q&A

Mailbag: What’s the Best Way to Clean & Store Spray Paint Cans for Next Use?

Q. I have a lot of old, used spray paint cans on the shelf in my garage. And it seems like every time I grab one to paint with, it’s […]