The engine mount looks like a simple metal bracket. they are. They attached one side of the engine to the frame and the other side to the frame. Their only function is to hold the power unit in place. But why don’t manufacturers build them to be tougher? Because most buyers don’t want to feel their car moving.
Factory mounts are designed to be the lowest common denominator. These people just want to get to work without sending chills. These mounts use soft rubber or plastic pads. They act as shock absorbers. They soak up engine oscillation before it hits the cabin. This makes everyday driving quieter. It makes it smooth. It makes it boring.
What Is Drive Line Lash?
This softness causes a problem called driveline lash. Here’s how it works: You press the gas. The engine generates torque. But instead of the engine immediately transmitting power to the wheels, the engine shifts. It rocks back and forth inside the soft mounts.
The factory setup sacrifices performance for comfort as it dampens engine movement that would otherwise be transferred to the road.
This movement consumes energy. Moving the engine block instead of spinning the tires uses up some horsepower. This is a small loss, but when it comes to tuning performance, every little thing counts. If you can bypass that cushion, more power is put to the pavement.
The Case for Urethane Upgrades
The motor mount cannot be removed completely. The engine still needs support. However, you can upgrade. Performance tuning companies sell sturdier mounts. Hard polyurethane is often used instead of soft rubber.
Polyurethane is less flexible. It absorbs less vibration. This means it absorbs less power. The trade-off is simple. You lose comfort. You gain direct connection.
This upgrade is important if stock parts fail. Factory mounts last a long time. However, engine oil leaks are a common killer. Oil breaks down rubber. Once the mounts are compromised, the engine bounces unpredictably. That bouncing sucks power. Other components may also be damaged.
Comfort and track readiness
Will the ride get even harder? It varies by product. Some brands offer mild upgrades. The changes are hardly noticeable. Others are stiff. These are the weekend track toys. It transmits each engine pulse to the driver’s seat.
The costs vary depending on the brand and model. Installation is not always easy. Some vehicles require the engine to be completely removed to swap the mounts. Requires special equipment. Space is needed.
If you are not a mechanic, this can be a difficult DIY project. A good aftermarket shop can advise you on the exact stiffness you need. They will tell you if the upgrade is worth the discomfort is worth it for your driving style. But they can’t make it comfortable. This is the price you pay for performance.
