June 16, 2026
A Critical Detail That Can Make or Break Your Engine When assembling a BMW S54 engine, proper camshaft timing is one of the most critical steps in the entire build process. A small error in timing can lead to poor performance, VANOS faults, excessive noise, and potentially expensive engine damage. […]
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June 5, 2026
How Often Should You Service a Drenth DG400 Sequential Gearbox? When it comes to motorsport, reliability isn’t just about finishing races—it’s about protecting your investment and avoiding expensive failures that can ruin an entire race weekend. Recently, a customer brought his Drenth DG400 sequential gearbox to VAC Motorsports after experiencing […]
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June 3, 2026
Can Transmission Mounts Cause Missed Shifts? If you’ve ever gone for a perfect downshift in your BMW E36 or E46 and somehow ended up fighting the shifter—or worse, missing the gear completely—you’ve probably blamed the transmission, shifter linkage, or maybe even yourself. The reality is that one of the most […]
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June 1, 2026
Why Fuel Cell Foam Matters in Your Race Car If you’ve ever looked inside a racing fuel cell, you’ve probably noticed large blocks of foam filling much of the tank’s interior. Most racers know it’s there. Few understand exactly what it does. Fuel cell foam is one of the most […]
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May 27, 2026
BMW Wheel Vibration After Installing Wheel Spacers? Here’s What You Need to Know If you recently installed aftermarket wheel spacers on your BMW and now notice steering wheel vibration, shaking at highway speeds, or inconsistent wheel feel, you are not alone. This is one of the most common issues BMW […]
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May 22, 2026
Why BMW E46 M3 Overheating Problems Are So Common The BMW E46 M3 is one of the greatest performance cars BMW ever produced, but as these cars continue to age, overheating issues have become one of the most common and expensive problems owners face. At the center of many of […]
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May 13, 2026
“Runs good” can be one of the most dangerous phrases in engine building. I’ve seen engines make solid power on the dyno, idle smoothly, and still have ring seal issues hiding underneath. Then a few weeks later? Oil consumption. Blow-by. Weak cylinders. Tear it all back apart. That’s why leak […]
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May 6, 2026
If you’ve spent any time building BMW engines, you already know this moment: you’re mid-build, everything is going smoothly, and then a head bolt doesn’t torque correctly. You pull it back out and realize the block’s threads are compromised. That’s where a straightforward job suddenly becomes a serious decision point. […]
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April 29, 2026
If you’ve been around BMW performance builds long enough, you’ve heard about crank hub failure. Some people dismiss it. Others have dealt with it the hard way. The reality is simple:once you start increasing torque, the factory design becomes a weak link. What Is Crank Hub Failure? On engines like […]
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November 25, 2025
Upgrade Your 2025+ Hyundai Elantra N Interior with Sparco QRT-R Seats and VAC Motorsports Floor Mount Adapters Hyundai’s N-division gave the 2025+ Elantra N a personality that’s part daily-driver, part track-hooligan. The chassis is sharp, the turbo power is punchy, and the whole package loves to be driven hard. But […]
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November 24, 2025
Unlocking the Full Potential of the BMW S38: Tilton Multi-Plate Clutch + VAC Lightweight Flywheel BMW’s S38 engine has never been shy about announcing itself. Big displacement, mechanical personality, and the unmistakable howl that defined the E28 M5 and E34 M5. When tuned and built correctly, the S38 becomes something […]
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April 30, 2025
Turbochargers have become a staple in both modern performance and efficiency-focused vehicles. Even BMW, a historic champion of natural aspiration, especially in ///M cars, has made the switch to boost! Turbos provide more power by forcing extra air into the engine, allowing for better combustion and increased horsepower. However, if […]
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