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Uprating ISM 450

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Uprating ISM 450

03-14-2009, 08:18 PM	#1
Ken Gluckman Member Join Date: Dec 2006 Posts: 58	I have been told that the only difference between the ISM 450 and ISM 500 is in the software and that a Cummins tech can easily uprate a 450 to 500 using just the computer. Is this true? If so, is there any downside to doing this? Ken Gluckman __________________ 2008 Newmar Mountain Aire MADP-4528

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03-16-2009, 12:20 PM	#2
Techie Senior Member Join Date: Jul 2005 Location: Pahrump, NV Posts: 319	Not sure about the upgrade but you should verify that you won't have more power than your trans can handle. __________________ 2011 Airstream Classic Limited 2011 GMC Sierra 2500HD Duramax/Allison

03-16-2009, 03:51 PM	#3
racer0624 Senior Member Join Date: Jan 2005 Location: Destin, Fl Posts: 318	Ken, My understanding is that it's just a simple programming change. However, it's not cheap! I think it's because of the additional warranty exposure. You should have a 4000 series trans and it's good for 500hp. __________________ John, 2009 4508 EXDP, Destin, Fl 2010 Buick Enclave, SMI AFOne

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