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#26 |
Registered User
Join Date: Dec 2019
Location: Oregon
Posts: 158
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Re: Swapping L86 6.2 8l90e into 72 k10
Did you do any modifications to the charging system? If the alternator still controlled by the stock ECU?
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#27 |
Registered User
Join Date: Jul 2003
Location: N. Alabama
Posts: 132
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Re: Swapping L86 6.2 8l90e into 72 k10
Mine, and i think all the conversion harnesses use the stock controls in the ECU to control whatever parts of the engine are usually kept as part of the swap. The alternator is certainly one of these. It also controls the speed of the cooling fans.
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#28 |
Senior Member
![]() Join Date: Mar 2015
Location: washington
Posts: 2,243
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Re: Swapping L86 6.2 8l90e into 72 k10
Thanks for the excellent write up.
Some L86 engine background information below; The L86 is a Gen. 5, 6.2L, small-block engine powering 2014-present GM trucks and SUVs. They are known as the EcoTec3 6.2L engines. These engines use a longer intake runner than its cousin, the LT1. This helped the L86 produce peak torque 500 rpm sooner than the car version of the 6.2L engine. However, it falls about 35 horsepower behind the LT1 at maximum output. The L86 engines are all-aluminum, feature Active Fuel Management (AFM) and Variable Valve Timing (VVT), and are Flex Fuel-capable (E85). The engines also use direct fuel injection technology, which shoots fuel directly into the combustion chamber instead of the intake runner. The information listed here is for a stock engine. L86 Engine Ratings Compression Ratio 11.5:1 Horsepower Rating 420 hp @ 5,600 rpm Torque Rating 460 ft.-lbs. @ 4,100 rpm |
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#29 |
*************
![]() Join Date: Apr 2005
Location: Pensacola, FL
Posts: 17,846
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Re: Swapping L86 6.2 8l90e into 72 k10
How's the truck running? We're getting close the L86/8spd swap in the 93 OBS truck. What did you do for transmission dipstick? I'm trying to use a modified one from a 6L90. Hopefully it will work out. We also used the stock 2017 fans and radiator. They fit like a glove. Just need to build a cover for the top. We used a coolant recovery tank from a 2019+ Chevy truck because the mounting points worked out better. Pics included.
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Rob - https://www.instagram.com/hart_rod_c10 As Iron Sharpens Iron, So One Man Sharpens Another. Proverbs 27:17 FOR SALE: DBW pedal bracket - http://67-72chevytrucks.com/vboard/s...d.php?t=651123 FOR SALE: Hood Brackets http://67-72chevytrucks.com/vboard/s...d.php?t=679945 1987 Silverado SWB - 34.5K original miles http://67-72chevytrucks.com/vboard/s...d.php?t=801834 1969 SuperBurb - http://67-72chevytrucks.com/vboard/s...d.php?t=200387 1968 Farm truck - http://67-72chevytrucks.com/vboard/s...d.php?t=358692 1968 SWB - http://67-72chevytrucks.com/vboard/s...d.php?t=551258 1948 Chevy - http://67-72chevytrucks.com/vboard/s...=122164&page=3 |
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#30 |
Senior Member
![]() Join Date: Jul 2008
Location: kennewick, WA
Posts: 1,508
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Re: Swapping L86 6.2 8l90e into 72 k10
This is a cool build and I love that you were able to source OEM parts. I am wanting to do something similar to my K20. Nice work
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#31 | |
Registered User
Join Date: May 2022
Location: Illinois
Posts: 162
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Re: Swapping L86 6.2 8l90e into 72 k10
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#32 |
Registered User
Join Date: May 2022
Location: Illinois
Posts: 162
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Re: Swapping L86 6.2 8l90e into 72 k10
Bumpity bump...I am trying to find out if you used factory exhaust manifolds? My L8T is almost ready to install.
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#33 | |
Registered User
Join Date: Jul 2003
Location: N. Alabama
Posts: 132
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Re: Swapping L86 6.2 8l90e into 72 k10
Quote:
Been a couple of years now, but if i remember correctly, one side of the iron manifolds points outward slightly and would have been difficult to get the exhaust pipe attached without trimming the frame. I just re-read this entire posting completely and have to say i probably wouldnt change a single thing. Sometimes when you live with modifications for a while, you realize things you should not have done, but the 6.2Lt/8l90e has been a winner. It completely transformed my old truck. I like it so much i sold my newer Silverado, and i use it for everything. One additional thing i noticed was that i kind of criticized Mitch at SwapTime who did my harness. It was an honest mistake and he ended up being very helpful and getting me running great. I cant figure how to edit the original post so I thought would ad it here that i have used him since, have no problem recommending him. |
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#34 | |
Registered User
Join Date: May 2022
Location: Illinois
Posts: 162
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Re: Swapping L86 6.2 8l90e into 72 k10
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