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As a longtime promoter of tunnel rams, Freiburger is often asked about running a four-barrel carb vs dual quads on the tunnel ram; he answers with a setup for guys who are all about the look and presence of the tunnel ram.

Engine Masters

Tunnel Ram Battle: Single v. Dual Quad

One thousand horsepower is all too common these days and all too accessible. With these numbers well within reach, it's time we looked into two ways to get there: a supercharger on a medium-sized mill; and natural aspiration atop large-displacement.

Blown v. NA - Two Ways to 1,000 hp

Multipoint EFI gets its turn against the venerable Dominator; it's injectors versus jets, dry flow versus wet, and drivability versus horsepower.

Carb v. EFI: The Multipoint Edition

Discovering how a wet system stacks up against a dry system in an EFI manifold.

Wet vs. Dry Nitrous

Do boost leaks really even matter? Can vacuum leaks make more power? You read those questions right. Come be surprised right along with us as we find power in unexpected places, and lose less than we'd expect in others.

The Leaker Episode

The ability to run a blend of gas and E85 is a game changer; credit the flex fuel sensor, which samples fuel composition and adjusts fuel flow, making more power as more E85 is mixed in.

The Magic of the Flex Fuel Sensor

The six pack was designed to supply part-throttle economy to the center while the outside carbs kick in for power; the guys test three six pack designs to find out which is gimmick, which is greatness and which makes the most power on a street 440.

Six Pack Shootout!!

What do you do when your 800-horsepower 572 just won't get you consistent eight-second passes in your '31 Model A? Well, if you're David Freiburger, you strap it to the Westech dyno to tune, poke and swap at until you're at a comfortable 950+ horsepower.

Quest for F-Rod Greatness

The guys test three LS oil pumps in different volume and oil pressure configurations to see if too much pressure reduces horsepower.

Oil Pumps for Power?!

The guys have tested single V-split pattern cams before and concluded that a split pattern can increase top-end power without necessarily affecting bottom-end torque; their findings have been challenged, and they're here for the science.

Single Pattern vs. Split Pattern Cams

This test is all about choosing the features you want and need on a carburetor, and how those features affect horsepower and tunability. Do mechanical secondaries really make any more power than vacuum-power ones? Does a choke horn restrict inlet airflow?

Pick-a-Carb Shootout

No matter how many LS swaps are out there, the old-school SBC is still an absolute force in the marketplace; the guys bolt three of the lowest-buck cylinder heads out there to their Ultimate Average 383 and make pulls for power.

Low Buck SBC Head Shootout

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Auto parts testing and engine-to-engine shootouts; developed from the popular Engine Masters Challenge and hosted by Steve Dulcich of Engine Masters magazine, David Freiburger of Roadkill, and Steve Brule of Westech Performance Group.

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Examining whether cast manifolds are enough to keep up with turbo motors, and at what point it should be running proper headers.

S7 E7 | Manifolds or Headers for Your Turbo LS

E26 | Tunnel Ram Battle: Single v. Dual Quad

E25 | Blown v. NA - Two Ways to 1,000 hp

E24 | Carb v. EFI: The Multipoint Edition

E23 | Wet vs. Dry Nitrous

E22 | The Leaker Episode

E21 | The Magic of the Flex Fuel Sensor

E20 | Six Pack Shootout!!

E19 | Quest for F-Rod Greatness

E18 | Oil Pumps for Power?!

E17 | Single Pattern vs. Split Pattern Cams

E16 | Pick-a-Carb Shootout

E15 | Low Buck SBC Head Shootout