- Industrial air compressor

When is a V8 not a V8?

Industrial engines and air compressors, oh my!

4w ago
7K

This is an old GrimmerSchmidt gasoline-powered tow-behind portable air compressor, rated for 125CFM air flow and a maximum pressure of 125PSI. The GrimmerSchmidt brand no longer exists; Atlas Copco acquired the Grimmer Industries compressor business in 2008, and the following year they merged the current product line in to their Chicago Pneumatic brand.

That's a familiar name!

That's a familiar name!

This was built on a Ford 302 industrial engine - a variant of the same engine that evolved in to the 5.0L on the automotive side.

Yep, it's an engine.

Yep, it's an engine.

Industrial engines are their own special world. It can be difficult to find information about them because they could be modified in any number of ways for a specific application between being sold as a crate and being delivered in a finished product. This one is probably modified a little more than average.

Ignition!

Ignition!

These GrimmerSchmidt compressors were built around V8 engines with one bank of 4 cylinders running as a normal engine and the other bank operating as the air compressor. Both sides share the air filter and oil. If you look for these on the internet you'll find used ones for sale listed as both 4-cylinder and 8-cylinder engines, and both are sort of right but sort of wrong.

The hood has an access port for this panel when it's closed.

The hood has an access port for this panel when it's closed.

Some higher-output GrimmerSchmidt portable air compressors of the same generation were built from the Ford 351 (5.8L) industrial engine with the same 4 power / 4 compression setup.

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Comments (2)

  • Woah, that's crazy. How can it only run one bank at once?

      1 month ago
    • I didn't dig that deep, but I'm guessing changes to ignition, timing, maybe camshaft to run the power bank as an inline-4. It has a specific (fairly low) operating RPM range and a well-defined load, so there is a little more room for change...

      Read more
        1 month ago
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