D4 Question

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Jbayer

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Can you fit a 4 1/2 bore cylinder in an old 7j or 4g RD4. I know they came with 4 1/4 but just wondering if anyone has tried it. I know cat made a few
D4's with a D6 engine. I think they called it a D5. Saw one up a Jim Zimmermans last winter. I suppose bigger injectors would be neccessary. Thanks
John

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Wed, Jun 3, 2009 11:18 AM

Old Magnet

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Don't know all the details but yes....the D4400 can/has been modified to accept the 4-1/2 in bore pistons.

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Wed, Jun 3, 2009 12:05 PM

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