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Hduramax · 03-25-2011, 05:00 PM

I am just wondering if any one has attempted to put in a 8.1 in their truck and if so was it a hugh pain or did go OK. I got a chance at a motor out of a late model avalanche:motor,tranny, harness, for a decent price. Just not sure I want to hassel with it since I already have a 383 T.P.I I can use

Thanks for looking and any help

usmcchevy · 03-25-2011, 05:14 PM

Here ya go.

http://67-72chevytrucks.com/vboard/s...d.php?t=438988

Hduramax · 03-25-2011, 05:23 PM

Thanks for the link, it looks like i can get plent of info off it

**Clyde65** · 03-25-2011, 05:47 PM

are you sure it is from an Avalanche? I thought those were just 1/2 ton subs under the skin.

If they are I think a 5.3 is more likely, MAYBE a 6.0.

Maybe someone can verify, I am no expert.

Big Port Jimmy 6 · 03-25-2011, 06:06 PM

Quote:

Originally Posted by Clyde65

are you sure it is from an Avalanche? I thought those were just 1/2 ton subs under the skin.

If they are I think a 5.3 is more likely, MAYBE a 6.0.

Maybe someone can verify, I am no expert.

Nope, you could get a 2500 Avalanche, there are a couple here in town. Jay

Hduramax · 03-25-2011, 06:17 PM

it is for sure a 3/4 ton with the 8.1 they just dont make to many performance parts for it and chevy stopped making them, but i love the fact that they r torque monsters

Hduramax · 04-03-2011, 07:47 PM

I have decided to buy the big block, picking it up this week and then the fun begins. Cant wait lol

IGOR · 04-04-2011, 12:39 PM

Nice! I picked one up in Feb - anxious to drop it in frame rails!

Hduramax · 04-04-2011, 07:00 PM

IGOR checked out your blazer build very nice,My motor is coming out of a 05 avalanche getting motor trans and harness,if I can talk him into it I am trying for the fuel system and cooling system too
keep up the nice work

sobayshortbed · 04-17-2011, 04:33 PM

i was debating picking up an 8.1 but went with a 6.0 to keep the truck light. the 8.1 should workout nice with minor mods, big block mounts, headers and so on.

Hduramax · 04-17-2011, 05:05 PM

The torque will make up for the weight lol

**LEEVON** · 04-17-2011, 06:15 PM

DirtyLarry hangs out in the 73-87 forum, he's got an 8.1L in his truck. I think there are quite a few more issues to deal with.

IGOR · 04-19-2011, 11:05 AM

Quote:

Originally Posted by Hduramax

IGOR checked out your blazer build very nice,My motor is coming out of a 05 avalanche getting motor trans and harness,if I can talk him into it I am trying for the fuel system and cooling system too
keep up the nice work

Thank you sir! I am working on my cross member right now - trying to modify a DIY4X setup to fit under this oil pan. I'm very close!

Hduramax · 04-27-2011, 09:47 PM

got everything picked up this weekend for my 8.1 swap, got the motor, tranny. harness, fuel system,cooling system, going to also use the brake system off the donor truck and I got the exhaust(can at least use the mounting flanges and the O2 sensors)now to find the time and money to get it in the truck

Mr. 250r · 04-28-2011, 12:37 AM

They do make up for the weight the power is awesome just the mileage isn't but when towing it never goes down if your gonna tow

Hduramax · 04-28-2011, 08:33 PM

The mileage can't be that bad the weight difference between the donor truck and my truck is roughly 2500 lbs, but I ain't building it for mileage,I plan on driving it like I stole it lol

Mr. 250r · 04-28-2011, 08:41 PM

my friends truck 8.1 gets 9mpgs avg when towing a suburban he got the same but he claims he gets 13 now but i think that's light footin lucky driving lol but your not going for mileage and your truck is lighter
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IGOR · 05-01-2011, 12:23 AM

Nice! Can't wait to see this come together for you.

I got my cross member all welded up today. Hopefully going to drop motor in the frame tomorrow - we'll see!

03-25-2011, 05:00 PM	#1
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Any 1 put a I am just wondering if any one has attempted to put in a 8.1 in their truck and if so was it a hugh pain or did go OK. I got a chance at a motor out of a late model avalanche:motor,tranny, harness, for a decent price. Just not sure I want to hassel with it since I already have a 383 T.P.I I can use Thanks for looking and any help

03-25-2011, 05:14 PM	#2
usmcchevy Has more rust than truck... Join Date: Apr 2005 Location: Ivanhoe, MN Posts: 2,421	Re: Any 1 put a Here ya go. http://67-72chevytrucks.com/vboard/s...d.php?t=438988 __________________ 1972 Custom/10 SWB, 4.8/4l80e Build thread LSx Swap FAQ index

03-25-2011, 05:23 PM	#3
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a Thanks for the link, it looks like i can get plent of info off it

03-25-2011, 05:47 PM	#4
Clyde65 1965 Chevy C10, 2005 4.8L/4l60 Join Date: Aug 2004 Location: DFW Texas Posts: 8,540	Re: Any 1 put a are you sure it is from an Avalanche? I thought those were just 1/2 ton subs under the skin. If they are I think a 5.3 is more likely, MAYBE a 6.0. Maybe someone can verify, I am no expert. __________________ Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 *support our troops!*

03-25-2011, 06:17 PM	#6
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a it is for sure a 3/4 ton with the 8.1 they just dont make to many performance parts for it and chevy stopped making them, but i love the fact that they r torque monsters __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-03-2011, 07:47 PM	#7
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a I have decided to buy the big block, picking it up this week and then the fun begins. Cant wait lol __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-04-2011, 12:39 PM	#8
IGOR Registered User Join Date: Feb 2003 Location: Damascus, OR Posts: 260	Re: Any 1 put a Nice! I picked one up in Feb - anxious to drop it in frame rails! __________________ -Ben 1972 CST K5 - Undergoing frame off, 8.1/4L80E/NP205, 3/4 ton, 8" lift, currently a pile of parts that when assembled resemble a Blazer 1972 K10 - Rust Bucket, TBD 1976 C10 SWB, 350 / T350 My blazer build thread: https://ck5.com/forums/builds/72-k5-...17-update.410/

04-04-2011, 07:00 PM	#9
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a IGOR checked out your blazer build very nice,My motor is coming out of a 05 avalanche getting motor trans and harness,if I can talk him into it I am trying for the fuel system and cooling system too keep up the nice work __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-17-2011, 04:33 PM	#10
sobayshortbed Registered User Join Date: Apr 2011 Location: lomita ca Posts: 19	Re: Any 1 put a i was debating picking up an 8.1 but went with a 6.0 to keep the truck light. the 8.1 should workout nice with minor mods, big block mounts, headers and so on.

04-17-2011, 05:05 PM	#11
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a The torque will make up for the weight lol __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-17-2011, 06:15 PM	#12
LEEVON Registered User Join Date: Jul 2006 Location: Ozark, MO Posts: 4,887	Re: Any 1 put a DirtyLarry hangs out in the 73-87 forum, he's got an 8.1L in his truck. I think there are quite a few more issues to deal with. __________________ '20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids

04-27-2011, 09:47 PM	#14
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a got everything picked up this weekend for my 8.1 swap, got the motor, tranny. harness, fuel system,cooling system, going to also use the brake system off the donor truck and I got the exhaust(can at least use the mounting flanges and the O2 sensors)now to find the time and money to get it in the truck __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-28-2011, 12:37 AM	#15
Mr. 250r Registered User Join Date: Dec 2010 Location: freeburg, illinois Posts: 885	Re: Any 1 put a They do make up for the weight the power is awesome just the mileage isn't but when towing it never goes down if your gonna tow __________________ 1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB

04-28-2011, 08:33 PM	#16
Hduramax Registered User Join Date: Mar 2011 Location: Alto,Mi Posts: 164	Re: Any 1 put a The mileage can't be that bad the weight difference between the donor truck and my truck is roughly 2500 lbs, but I ain't building it for mileage,I plan on driving it like I stole it lol __________________ 2008 HD 2010 Camaro 2ss (The Wife's Ride) 2005 Suzuki GSX-R 1300 "Busa" 1969 C-10 (under Construction) 2013 Sonic LT "LIVE LIFE,TASTE DEATH"

04-28-2011, 08:41 PM	#17
Mr. 250r Registered User Join Date: Dec 2010 Location: freeburg, illinois Posts: 885	Re: Any 1 put a my friends truck 8.1 gets 9mpgs avg when towing a suburban he got the same but he claims he gets 13 now but i think that's light footin lucky driving lol but your not going for mileage and your truck is lighter Posted via Mobile Device __________________ 1987 Chevy V30 - http://67-72chevytrucks.com/vboard/s...d.php?t=573854 1988 IROC-Z Camaro - 305/T5 T-Top 1989 GMC V35 - Marbolo Express http://67-72chevytrucks.com/vboard/s...d.php?t=596850 1991 V2500 Suburban Silverado - Sold 1991 V2500 Suburban Scottsdale - Big Nasty http://67-72chevytrucks.com/vboard/s...d.php?t=497423 2001 Ram 3500 5.9 H.O NV56 EC DRW - Sold 2003 1500 Silverado 2004 Ram 3500 5.9 H.O NV56 CC DRW - Sold 2005 Silverado 2500HD 6.6/ZF6 CC LWB



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05-01-2011, 12:23 AM	#18
IGOR Registered User Join Date: Feb 2003 Location: Damascus, OR Posts: 260	Re: Any 1 put a Nice! Can't wait to see this come together for you. I got my cross member all welded up today. Hopefully going to drop motor in the frame tomorrow - we'll see! __________________ -Ben 1972 CST K5 - Undergoing frame off, 8.1/4L80E/NP205, 3/4 ton, 8" lift, currently a pile of parts that when assembled resemble a Blazer 1972 K10 - Rust Bucket, TBD 1976 C10 SWB, 350 / T350 My blazer build thread: https://ck5.com/forums/builds/72-k5-...17-update.410/

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