8.1 allison combo

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8.1 allison combo

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Chevrolet >> Chevy Trucks, Vans & SUV's >> Silverado >> 8.1 allison combo

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8.1 allison combo - 7/14/2006 4:06:30 PM

birddog16

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Joined: 7/14/2006
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I am looking at a 06 3500 and wondering how the 8.1 and allison combo do. power, mileage ect.

Post #: 1

RE: 8.1 allison combo - 7/14/2006 6:18:47 PM

kcb37

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Joined: 7/3/2006
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What size is the 8.1? Do you know? I think if I remeber right a 7.4 or something around that is a 454. If it is a gas engine you will probably not have all that good of gas mileage.
If you get a 6.6 Duramax you can get a lot of power out of that. You will have to spend some money but your mileage will probably be better. You will have to do some checking to see what you can do and want to do to a Duramax. But they are good engines to begin with anyway. My opinion if you want a pickup that heavy and want to pull with it you would be better off with a 6.6.

(in reply to birddog16)

Post #: 2

RE: 8.1 allison combo - 7/14/2006 6:54:21 PM

birddog16

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Joined: 7/14/2006
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The 8.1 is 496 cid I believe. I am currantly running a 03 F350 v10 4 sp auto. and getting 12.5/15 empty. I know a lot of people like the dls but I am a gas engine man all the way.

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Post #: 3

RE: 8.1 allison combo - 7/14/2006 6:59:43 PM

kcb37

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Joined: 7/3/2006
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I like gas too. But when it comes to pulling that can make a big difference. I also know you can get a lot of power out of a desiel. Ford, Dodge, or Chevy. The MPG should be better too.
That is a big engine, but is would seem to be a big gas hog to me. (could be wrong thought)

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Post #: 4

RE: 8.1 allison combo - 7/14/2006 7:09:22 PM

birddog16

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Joined: 7/14/2006
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Thats a fact big CID gas engines are thirsty, and with 3.00 a gal gas you have to learn to keep your foot out of them( takes away some of the fun). But when you take out the initial cost, maint. and fuel (dsl not as cheap as it used to be). the difference is not that great. I am NOT trying to start a gas dsl war it's just big CID gas engines are my choice. while I have not driven a 6.6 I have spent time behind a CTD and PSD and I am one who can not get past the turbo lag. Most of my work is farm related so I don't do long trips under load but I do haul/tow 10K lbs plus and need the grunt to make her go.

(in reply to kcb37)

Post #: 5

RE: 8.1 allison combo - 7/14/2006 11:21:46 PM

Chevrolettruckman8

Posts: 30
Joined: 5/16/2006
Status: offline

yeah the 8.1 is a 496 block GM switche dthe engines all aorund in 99-00 save for the old bodys and i think suburban and tahoes. weird set of years. i have a 1995 454 and get 13 tops, my dad has a 1999 454 vortec and so he get around 14.....keep in mind that there ford boy has a 6.8L V10.......youd be a WHOLE 1.3L larger thats gonna be some gas....personally with how the newer diesels perform compared to gas id go with a diesel but if you go USED and older go for gas just my thoughts

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Post #: 6

RE: 8.1 allison combo - 7/15/2006 8:21:37 PM

birddog16

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Joined: 7/14/2006
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I know a lot of folks like the dsl but I for one would not own one new,used, free or any other way. Just looking to see what people thought of the 8.1 allison combo.

(in reply to Chevrolettruckman8)

Post #: 7

RE: 8.1 allison combo - 7/16/2006 8:00:45 AM

carpenterbill

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Joined: 6/23/2006
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I"m going dsl on my next truck, the power and fuel economy is to big a draw for me. 350hp, 500fpt, and 17-21 mpg, Im sold.

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Post #: 8

RE: 8.1 allison combo - 7/17/2006 8:16:00 PM

Chevrolettruckman8

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Joined: 5/16/2006
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ford is 600 with a 6.0L dodge is 610 with a 5.9L and GM has a 650 with a 6.6L hoprses on the gm are 360 i unno about ford and dodge horses.....the mileage is right ive heard plenty of people on the ford diesels getting like that and on the dodges similiar and gm i think a lil less cause your getting more liters but then again thats more power right?

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Post #: 9

RE: 8.1 allison combo - 8/20/2006 8:08:12 PM

kcajeel

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Joined: 7/6/2006
Status: offline

My brother in law has one like that. A 2005 K2500 8.1, allison, 3.73 gears, extended cab, long bed. We've compaired mileags because I have a 1997 K2500 454, manual 5 speed, 4.11 gears, extended cab, long bed. I have gotten as high as 14.2 on my 454. He has gotten 11 for a high, and he gets 7 and 8 pulling a 30 foot 5th wheel camper. Hope that helps

(in reply to Chevrolettruckman8)

Post #: 10