Swapping L86 6.2 8l90e into 72 k10

[HYPR]

Originally Posted by barraza

Little update:
With my current setup, i found i had a battery drain. Took a while to find, but the radiator fans draw power even with everything turned off. Not sure why, maybe it has something to do with the speed sensing they feed back to the ECM. Anyway, instead of powering them with direct battery power, they must be run by a relay switched by the key.

They were using about 40milliamps of power each. Enough to drain the battery in a few weeks.

Another thing to consider when using the 8l90e trans. It has a VERY low first gear, 4.56, and with overdrives, you end up with a wide gear range. There is no reason to use low axle gears.

I love this engine and trans. Best modification i have ever made.

I'm doing a similar install on my C20 Custom Camper with the L83/6L90E.
I like what I read about you leaving the LT water pump in place. I did notice you kept the original AC system instead of upgrading to a Vintage Air GEN 5 Sure Fit System. How did you address the Variable Displacement GEN5 LT AC Compressor? As I understand these are not compatible with each other.

[Hart_Rod]

Originally Posted by HYPR

I'm doing a similar install on my C20 Custom Camper with the L83/6L90E.
I like what I read about you leaving the LT water pump in place. I did notice you kept the original AC system instead of upgrading to a Vintage Air GEN 5 Sure Fit System. How did you address the Variable Displacement GEN5 LT AC Compressor? As I understand these are not compatible with each other.

Curious about this as well. TIA

[ls1nova71]

Originally Posted by Hart_Rod

Curious about this as well. TIA

There is a plug on the back of the compressor you just apply power to whenever the clutch is engaged, that will lock it in full displacement. That said, with VA, it may work, it may not. It will likely work but maybe not to it's full potential due to being too much displacement for VA. They are sized for the compressors they use and work best with the correct one. Would probably do better when hooked up to an original factory air set up since they used a bigger compressor.