A Few Hot Engine Pics from the 2015 Street Nats
RTST Ported Flow Testing Valves
Factory 409 Fuel Injection: No Really!
Why You Want ARP Bolts for Your Engine
663hp 434ci Small-Block Street Engine
Fifty Years with Valley Head Service
PipeMax Creator Larry Meaux on Race Engine Head Porting
A Few Hot Engine Pics from the 2015 Street Nats

A Few Hot Engine Pics from the 2015 Street

1
RTST Ported Flow Testing Valves

RTST Ported Flow Testing Valves

2
Factory 409 Fuel Injection: No Really!

Factory 409 Fuel Injection: No Really!

3
Why You Want ARP Bolts for Your Engine

Why You Want ARP Bolts for Your Engine

4
663hp 434ci Small-Block Street Engine

663hp 434ci Small-Block Street Engine

5
Fifty Years with Valley Head Service

Fifty Years with Valley Head Service

6
PipeMax Creator Larry Meaux on Race Engine Head Porting

PipeMax Creator Larry Meaux on Race Engine Head Porting

7

News & Reviews

  • A Few Hot Engine Pics from the 2015 Street Nats A Few Hot Engine Pics from the 2015 Street Nats
    Engine guys love looking at hot engines to see what everyone else is doing. Here's a selection of great looking engines that were seen that the 2015 Street Machine Nationals. No doubt, you'll find more than few to your liking...
    Read More ...
  • Physics for Gearheads Physics for Gearheads
    Physics for Gearheads by Randy Beikmann PhD. provides the detailed explanations you need to fully understand the intricate mechanical functions of high performance automobiles and race cars. Whether your interest is in increasing your engine's horsepower, getting more miles per gallon, or...
    Read More ...
  • RTST Ported Flow Testing Valves RTST Ported Flow Testing Valves
    The RTS kit permits precise mapping of the airflow values around the circumference of the valve at any lift value. It helps identify shrouded areas, poor performing short side radii and other obstructions such as valve stems and guides and...
    Read More ...
  • Factory 409 Fuel Injection: No Really! Factory 409 Fuel Injection: No Really!
    Factory 348ci and 409ci Chevrolet engines were never equipped with OEM fuel injection, but that doesn't mean it never existed. In a bid to improve power and economy, GM did extensive research on fuel injection for W-motored cars and trucks back in the day. This research was conducted in the late fifties as you will note...
    Read More ...
  • World’s First DOHC, 4-Valve per Cylinder Racing Engine World’s First DOHC, 4-Valve per Cylinder Racing Engine
    The key concept to this timeless racing masterpiece is the airflow enhancing inclined 4-valve top end operating in a pent-roof combustion chamber and actuated by dual overhead camshafts. One hundred years and millions of racing miles later this configuration is still the most desirable racing design...
    Read More ...
  • The Crew Chief’s Son The Crew Chief’s Son
    From 1957 through 1965 car owner and racing mechanic Louie Clements traveled NASCAR's emerging Grand National stock car racing series and he brought his entire family, wife and five kids along for the ride. Now Michael Clements brings those days alive with...
    Read More ...

Top Tech Tips

  • RTST Ported Flow Testing Valves RTST Ported Flow Testing Valves
    The RTS kit permits precise mapping of the airflow values around the circumference of the valve at any lift value. It helps identify shrouded areas, poor performing short side radii and other obstructions such as valve stems and guides and...
    Read More ...
  • Engine Building Rules Part 1: Planning Engine Building Rules Part 1: Planning
    Consider a typical performance engine build plan that holds true for many budget based bracket racing builds and illustrates how insufficient research and planning can steer an engine project down the wrong path right from the beginning. The first mistake is...
    Read More ...
  • Effects Of Changes in Cam Timing and Lobe Separation Angle Effects Of Changes in Cam Timing and Lobe Separation Angle
    The following tables provided by COMP Cams illustrate how variations in lobe separation angle and cam timing affect engine behavior. Engine builders can refer to these characteristics often to determine the likely effect of any cam timing alterations they may contemplate...
    Read More ...
  • Camshaft Basics Camshaft Basics
    Pushrod based engines use two basic types of camshaft; either flat tappet or roller tappet. It’s a little more complicated than that, but it basically comes down to the type of lifter. Up until the mid-eighties most production engines used flat tappet lifters with a crowned face that rides directly on the camshaft lobe...
    Read More ...
  • Calculating Piston Speed Calculating Piston Speed
    Mean piston speed has long been used as an indicator of component durability under severe service. It is a good rule of thumb for evaluating engine potential and it is even more instructive if you calculate maximum piston speed since one of the axioms of engine performance dictates that power comes from engine speed...
    Read More ...
  • Porting Pointers Porting Pointers
    The objective of porting a cylinder head is to improve engine performance via constructive enhancements to the intake and exhaust flow paths. Before you get to this point however, it's important to determine the rpm range of the desired power band and how you want to shape and position the torque curve...
    Read More ...
SEMA Action Network – Zone 3 and 3b
Mitech Racing Zone 3b – FP (275x 250)

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