Octane vs. Horsepower – Separating fact from myth in the debate over which fuel...
So many times I’ve heard different opinions from various experts on which octane fuel makes the most power. According to Spec E30 rules, “Permitted...
Bottom’s Up – Rebuilding a BMW M20 short block for your Spec E30
Whether you have a problem with your engine or just want to refresh the one in your Spec E30, having a tight, reliable power...
Rocket Science – Achieving Better Engine Cooling With Proper Aerodynamic Principles
Keeping a C5 Corvette cool on a racetrack in 100-degree heat isn’t easy. Just ask NASA Utah’s George Smith, who had been trying different...
Understanding Performance Fittings – Straight and AN Threads vs. Tapered Thread
If you are confused by the nomenclature of hoses and fittings associated with racecar plumbing, you’re not alone. Fittings are often measured in terms...
Cold-Air Intakes: How and Why They Work
Whether we’re talking about a street car, a racecar or even a tow vehicle, one of the easiest-to-install and most cost-effective performance parts we...
The Art of Scavenging – Myths and methods of getting burned gases out of...
For the longest time, the prevailing wisdom in the paddock with regard to exhaust was the bigger the pipe, the better. Bigger pipes let...
Understanding Oil Coolers
When engine output rises beyond a certain threshold per liter of displacement, an oil cooler becomes more important, critical even. There is a lot...
As Complete As Possible: How To Do An MX-5 2.5 Swap
There’s a fair amount of content on the web about swapping a 2.5-liter engine into an NC chassis MX-5, which comes from the factory...
Straightened Six – Refreshing a cylinder head on a Spec E30
When it comes to affordability, Spec E30 offers some of the most cost-efficient racing on track today, especially if you can do a lot...
How Fuel Pressure Regulators Work
The latent energy content of gasoline is fixed — 124,000 BTU — and the amount of horsepower you can make depends on how much...
