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Old December 3rd, 2012, 09:28 AM
Status: Offline
Dan Prasada-Rao
1963, 109 Station Wagon
Join Date: Oct 2004
Location: Great Mills, MD, USA
Posts: 485
Originally Posted by Roverlab View Post
Not really sure what a Cummins maximum rpm is, but at 3200 rpm, I never felt like I needed more.
Hope this helps!

Stock RPM was governed at 2700 for the 4BT. Governor springs are available for higher revs. I put a 3200rpm spring in mine. I think they have springs available up to 4000 or maybe a bit more.
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