Building a Privateer GT3 Nissan 370Z

Back in 2018, Valkyrie Autosport’s 370Z wasn’t quite ready for ES. It was still stuck in E0, where it had demonstrated dominant pace on...

Bracing a Miata Differential

If you want to be competitive in Spec Miata, you need the 4.30:1 Torsen or Mazda Motorsports differential. Most racers simply find a factory...

Reinventing the Clutch

For all practical purposes, the automotive clutch that has been in use for much of the last century was conceived by the Borg &...

HPDE46: How to Replace Shifter Bushings

In all candor, just going in and replacing the shifter bushings is too much work for the rewards it yields. Now that the job...

HPDE46: Replacing a Driveshaft Coupler

The moment you buy an older BMW, you must become familiar with a lexicon that includes such terms as DISA valve, DME, Bi-Xenon, SAP,...

The Advantages of Cryogenic Processing

The biggest misconceptions about cryogenic processing are that it can change the size of parts and lead to brittle components. Those misconceptions can be...

HPDE46 Replacing the Slave Cylinder Hose and Clutch Delay Valve

In stock form, the E46 BMW with a manual transmission has what’s called a clutch delay valve, which is essentially a step-down fitting in...

Reducing Rotating Mass – Lightweight Flywheels and Clutches Unleash More Power

Flywheels are necessary on piston engines because they preserve the momentum from one combustion stroke to the next. Early engines were so inefficient they...

Clutch Player – Installing a clutch on a Spec Miata engine the easy way

Depending on where you look, the two men credited with inventing the modern automotive clutch more than 120 years ago were two Frenchmen, Louis-Rene...

Cog Choice – How to Choose the Right Gear Ratios

Gears are expensive and hard to get to, so we are all motivated to get the right transmission and final drive gear ratios in...

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