Q&A

Pro-Filer Performance Cylinder Head
Q&A

Mailbag: How Exhaust Runner Volume Affects Engine Performance

Q: How is exhaust runner volume measured and how does it affect performance? … A: Exhaust runner volume is the measure of the passage from the exhaust valve to the […]

Q&A

Mailbag: Should I Get Hub Centric Rings for New Wheels?

Q: Do I need hub centric rings for my new wheels? … A: We recommend using hub centric rings on all aftermarket aluminum wheels that will accept them. Hub centric […]

Q&A

Ask Away: Explaining Mysterious Rod Bearing Failure

Could I get your opinion on an engine problem? I spun a rod bearing in my supercharged big-block Chevy. The engine makes big power and has run my ’55 Chevy […]

Q&A

Mailbag: Do I Need a High-Volume or High-Pressure Oil Pump?

Q: Do I need a high-volume or high-pressure oil pump? … A: When buying an oil pump, you have a few options. The right pump for you depends on how […]

Q&A

Mailbag: Mating an Older GM Automatic Transmission to an LS Engine

Q: Can I use an older GM automatic transmission with an LS engine? … A: Yes. There are three exceptions in the LS engine family for what we’ll discuss here […]

Mailbag: 409 Stainless Steel vs. 304 Exhaust Materials
Q&A

Mailbag: 409 Stainless Steel vs. 304 Exhaust Materials

Q: What is the difference between 304 and 409 stainless steel? … A: All stainless steel contains chromium and other elements. The added elements make the metal harder, stronger, and […]

Q&A

Mailbag: The Difference Between Flat Tappet and Roller Camshafts

Q: What is the difference between a flat tappet and a roller camshaft? … A: Camshafts are classified by the type of lifter they use. The lobes on the cam […]

Q&A

Ask Away! with Jeff Smith: Comparing Pedal Effort with Hydraulic vs. Mechanical Clutch Systems

Does a hydraulic system make the clutch pedal effort easier than a mechanical linkage? A friend of mine says the effort will be the same because all the force is […]

Q&A

Mailbag: Key Differences Between Internal & External Engine Balance

Q: What’s the difference between internal and external engine balance? … A: An engine must be balanced to ensure smooth operation. Balancing an engine minimizes vibration which maximizes engine life. […]

Q&A

Ask Away! with Jeff Smith: Pro Tips for Mating a 2002 Chevy Trans to a 1999 Engine

Will a 2002 Chevy transmission work behind a ‘99 Chevy motor? Is wiring or computer an issue? I work at a junkyard and the interchange says one year only. This […]