5.9 w/ 4 speed vs. 6.7 w/ 6 speed

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06-08-2007, 09:26 AM

#16

Mcmopar

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Quote:

Originally Posted by Joe T

And since this is the High Performance and Accessories forum... you can forget about that with the 6.7 for now at least.

Actually, a bunch of aftermarket companies have stepped up to the plate. One thing I have noticed though, the "extreme" type settings are not "recommended" on the 07-08 anything, not just the Cummins.

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06-08-2007, 10:54 AM

#17

Joe T

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Quote:

Originally Posted by Joe T

Also, FWIW i told the service guy i was going to put a cat back on my truck and he didn't know it was a 5.9 and said I couldn't since they wouldn't allow it on the new diesel... i said it was a 5.9 and he was like yeah, that's ok.

I'll quote myself...

The last thing I'd want to do is void the warranty on the emissions equipment on these new trucks

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06-08-2007, 11:09 AM

#18

tcr

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5.9L w/ 4spd Auto. Thank us later!!!!!

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06-08-2007, 01:31 PM

#19

jmccart

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Either one will be radical. I think that we will be seeing some radical 6.7 numbers.

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06-08-2007, 01:39 PM

#20

HOV

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Another vote for the 5.9

Simplicity in design = reliability

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06-08-2007, 02:30 PM

#21

jgiachino

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Quote:

Originally Posted by Mcmopar

Actually, a bunch of aftermarket companies have stepped up to the plate.

There's still the unknown of DPF Longevity or bypass.....that's a large unknown....i can tell you i wouldnt run a fuel box / programmer on a 6.7 that didnt have some functionality to bypass the dpf....