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#1
12-24-2009, 12:59 AM
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Re: No more Big Blocks....R.I.P.
 I love my 8.1 and the 6.0 doesn't compare when pulling trailers. I can't offer an opinion on a 6.2 with the variable cam phasing. I'm sorry to see the 8.1 go, especially with how the newer diesel are less mod friendly and super complicated.
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Paul III 
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#3
12-24-2009, 09:32 PM
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Re: No more Big Blocks....R.I.P.
[ QUOTE ]
I love my 8.1 and the 6.0 doesn't compare when pulling trailers.[/ QUOTE ] Ditto...everyone around here I've talked to that had the 6.0 wished they'd gotten the 8.1L...except for *1* guy, who swears he's getting 18+ mpg from his 6.0!  Anyway, every one of the 6.0 guys say it's the same gas hog the 8.1L is, minus the extra grunt...and you're stuck with either the 5-speed manual or the 4L80/85e, versus the 6-speed or Allison if you go 8.1L.
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#4
12-24-2009, 10:51 PM
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Re: No more Big Blocks....R.I.P.
Rob
Do you happen to know what the last model year was that Chevy offered the 8.1 gas motor? And I have heard the same thing on the mileage, around 10 when towing with both  Your working the 6.0 harder with less tranny. JMO
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#5
12-24-2009, 11:27 PM
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Re: No more Big Blocks....R.I.P.
I have an '04 2500 Extended cab 4x4 with the Allison and 4.10 Posi. It pulls anything I put on it and has never ever let me down. The Duramax is a great engine but I move my truck almost every day out of the shop and would have gummed up a duramax long ago. Unless your non stop towing the 8.1 is the perfect truck. I ordered it new and will keep it forever. JMO. Ed
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... some old Chevrolets and Pontiacs.
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#6
12-24-2009, 11:49 PM
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Re: No more Big Blocks....R.I.P.
A close friend has a 6.0 with the Allison. Its in a new style. I also have a Duramax with a 480 behind it and a duramax with an Allison. The tranny makes a huge difference.
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#7
12-26-2009, 01:31 AM
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Re: No more Big Blocks....R.I.P.
[ QUOTE ]
A close friend has a 6.0 with the Allison. Its in a new style. I also have a Duramax with a 480 behind it and a duramax with an Allison. The tranny makes a huge difference. [/ QUOTE ] You sure about that 6.0/Ally combo? Are you talking about 2500/3500 trucks? I was thinking trucks got the hydra matic 6-speed automatic (6L80/90e derivative), because I'm pretty sure the Duramax is the only 2500/3500 application that gets the Ally?? How you like the Dmax van??? Those things are waaay detuned because of the tranny, but I always thought they were cool... And 2007 was the last year for the 8.1L in a 2500/3500 truck...
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