1975 International Harvester with Cummins 350 Engine: Is it a Big Cam?

Question:

The seller is claiming that the vehicle houses a powerful Cummins 350 engine, which is installed in a 1975 International Harvester.

Top Replies

Since it's not aftercooled, I estimate it to be around 240 horsepower. It's definitely not going to reach 350 horsepower. Truck Shop is the go-to expert for questions on performance upgrades like this.

@Truck Shop really stood out with the valuable information they provided in previous discussions. Their insights have been incredibly helpful to me.

Most turbochargers do not come with an aftercooler, and a small cam with 335 specifications is typically used.

Big Cams was established back in 1976, specializing in high-performance camshafts. The model likely to be from that era would be a 250 or 270 small cam, with the possibility of a 290 or 350 if equipped with an aftercooler. Essentially, a 350 is just a 335 aftercooled version with a blunt nose crank. Additionally, it seems that this particular model features a Bendix Two Flo compressor.

Despite the dirt obstructing my view and the fuzzy picture quality, I attempted to examine the cam follower boxes. It appeared to be a potentially smaller cam.

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Frequently Asked Questions (FAQ)

FAQ: 1. Is the Cummins 350 engine in a 1975 International Harvester a Big Cam engine?

Answer: Answer: It is possible that the Cummins 350 engine in the 1975 International Harvester is a Big Cam engine, but further verification or inspection would be needed to confirm this.

FAQ: 2. How can I determine if the Cummins 350 engine is indeed a Big Cam model?

Answer: Answer: To confirm if the Cummins 350 engine is a Big Cam model, you can check the engine's serial number or consult Cummins documentation to identify specific features unique to the Big Cam series.

FAQ: 3. What are the key characteristics of a Cummins Big Cam engine?

Answer: Answer: Cummins Big Cam engines are known for their distinctive design features, including changes in the camshaft design and other internal components, resulting in improved performance and efficiency compared to earlier models.

FAQ: 4. Are there any performance advantages to having a Cummins 350 Big Cam engine in a 1975 International Harvester?

Answer: Answer: If the vehicle indeed has a Cummins 350 Big Cam engine, you can expect enhanced power output, improved torque characteristics, and potentially better overall performance compared to non-Big Cam models.

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