Tech Articles

Tech Articles

Ask Away! with Jeff Smith: Troubleshooting Valve Train on Small Block Chevy 355

I have a 355 c.i.d. small-block Chevy with a big cam, decent compression, and production iron heads. The cam is an Isky 268/272 at 0.050 with 0.640-inch lift. It has […]

Tech Articles

4 Engine Assembly Tips for Maximizing Cam Bearing Performance

For many years, nearly all automotive camshaft bearings were manufactured with a babbitt-metal lining. Babbitt metal is a soft metal comprised mostly of tin (86 percent for Ford Motor Co. […]

Tech Articles

Ask Away! with Jeff Smith: Fixing Spongy Brake Pedal Feel After Transmission Swap

I have a brake bleeding question. We installed a Wilwood four-wheel disc brake system in my ’68 Nova about 15 years ago, and for a couple of years of driving […]

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Dyno Test: 120+ HP Gains and No Low-End Loss with Cam Swap on 6.2L LS Engine

Why were we so excited about swapping cams on the all-aluminum L92?Many reasons. The first was that we had previously run the Summit Stage 4 Pro LS cam (SUM-8711) successfully […]

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Ask Away! with Jeff Smith: How 2618 vs. 4032 Alloys Affect Forged Piston Noise

I am building an LSA supercharged 6.2L motor. I would prefer to run a 4032 forged piston with a 12cc dish to create the proper compression ratio. I recently watched […]

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Dyno Test: Adding 120 HP with Cam Swap in Turbo LS 5.3L

LS engines respond well to cam swaps. It’s probably the #1 upgrade for any LS, because the gains can be dramatic. The reason is that the LS engine family, from […]

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Ask Away! with Jeff Smith: A Brief History of the Airflow-Restricting Chevy 305

How did Chevrolet build the 305 cubic inch small-block? Is it a mash-up of 283 and 350 parts? Or is it just slightly larger than a 302 Chevy engine? — […]

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Clash of the Turbo Titans: Summit vs. eBay Turbos

Turbos rule. If you’re a turbo guy (or gal), there has never been a better time to be an enthusiast. Just look around, turbos are everywhere and on everything. Not […]

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Truck Cam Swap Testing to Add Low-End Torque

The LS engine remains the darling of the performance world, but does that mean all LS owners are looking for the same thing when it comes time for upgrades? Obviously […]

Tech Articles

Ask Away! with Jeff Smith: Matching Fuel Pumps, Lines & Injectors for Max Power

I need help understanding EFI high pressure fuel systems. I have researched all over but the answer eludes me. What determines line size? I’m trying to build a Whipple Supercharged […]