F-30 engine

Fritz Maurer · Sep 19, 2012

I have a book called, 'International Harvester Buyer's Guide' by Robert Pripps. He says the F-30 has the same bore and stroke as the 10-20.Is this correct? Thanks, Fritz

Anonymous-0 · Sep 19, 2012

The book is right 4.25" bore and 5" stroke. The only difference is the 10-20 turns over 1,000 RPM and F-30 turns 1,150 RPM.

F-Dean · Sep 19, 2012

Yes. This means that the rods and pistons are interchangeable.

The main difference is the water pump. The F-30/W-30 block and head has a different water flow and different "holes" between the head and block which requires a different head gasket.

My early W-30 has a 10-20 block which means it uses a 10-20 head gasket.

henryv11 · Sep 19, 2012

The F30 also has a different manafold and carb which gives it more power

robgIN · Sep 19, 2012

the heads are different, the F-30 has larger diameter valve stems and intake and exhaust are different size, I think in and ex the same size on 10-20 in addition to other differences mentioned.

ihstacks350 · Sep 19, 2012

i am looking for a 1020 engine.. does anyone know of one for sale

F-30 engine

Fritz Maurer

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Anonymous-0

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F-Dean

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henryv11

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robgIN

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ihstacks350

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