As an automotive enthusiast and lead author for Car News, I’m always thrilled to delve into the mechanics that make iconic cars like the 1985 Mustang GT so special. Today, we’re focusing on the heart of this legend: the stock roller camshaft.
This article is for those looking to unleash the power of their 5.0L engine by understanding the camshaft specifications of the ’85 GT. Whether you’re considering a swap or just want to geek out on the details, buckle up!
Demystifying the 1985 Mustang GT Roller Camshaft
The ’85 Mustang GT marked a pivotal moment in Mustang history. Not only did it bring back the 5.0L engine, but it also introduced a roller camshaft for the manual transmission models. This innovation meant smoother operation, improved high-RPM performance, and a more aggressive engine note.
But what exactly are the magical numbers behind this camshaft? Let’s break it down:
1985 Mustang GT 5-Speed Camshaft Specifications:
- Intake Duration: 266 degrees
- Exhaust Duration: 266 degrees
- Intake Valve Lift: 0.444 inches
- Exhaust Valve Lift: 0.444 inches
- Lobe Separation Angle (LSA): Not readily available (stock cams often didn’t have publicly shared LSA)
Why These Numbers Matter
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Duration: This refers to the number of crankshaft degrees the valve is open. The ’85 GT’s 266 degrees signifies a longer duration, leading to increased high-RPM power and a slightly rougher idle compared to a shorter duration cam.
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Valve Lift: This indicates how high the valve is lifted off its seat. A higher lift, like the 0.444 inches on the ’85 GT, allows for increased airflow and improved performance.
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Lobe Separation Angle (LSA): This is the angle between the peak lift points of the intake and exhaust lobes. While not readily available for the stock cam, it’s worth noting that adjusting the LSA can influence engine characteristics like low-end torque and idle quality.
Expert Insight
I spoke with John Miller, a veteran Ford mechanic, about the ’85 GT cam. “It was a great cam for its time,” he said. “It gave the 5.0L a noticeable bump in power, especially in the higher RPM range.”
The 1985 Mustang GT Cam: A Solid Choice for Mild Performance Builds
The stock 1985 Mustang GT camshaft offers a balanced combination of performance and drivability. It’s an excellent option for those looking for a mild upgrade over a stock flat-tappet camshaft or for maintaining the classic 5.0L character in a rebuild.
While more aggressive aftermarket camshafts are available, the stock ’85 GT camshaft remains a popular choice for its ability to deliver a satisfying blend of power, reliability, and that signature 5.0L rumble.
Have you experimented with different camshafts in your Ford builds? Share your experiences and insights in the comments below! Let’s keep this conversation rolling!