Swapping L86 6.2 8l90e into 72 k10

[FamilyTruckster65]

Did you do any modifications to the charging system? If the alternator still controlled by the stock ECU?

[barraza]

Originally Posted by FamilyTruckster65

Did you do any modifications to the charging system? If the alternator still controlled by the stock ECU?

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.

[Accelo]

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

[Hart_Rod]

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.

[chev-obsession]

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