LT1/LS1 Fan conversion




I found these LS1 Camaro fans and an extra upper shroud at the salvage yard.

The plan is to keep the wiring simple.
Activated by the thermosat switch, air conditioning, or a manual switch in the cab.

I used this adjustable variable speed electric fan control- Flex-a-lite's Variable Speed Control

Left fan (Drivers side) Light blue = Positive , Gray = Negative
Right Fan (Pass. side) White = Positive , Black = Negative

For the AC I tapped the light blue AC request wire , from the high pressure switch on the back of the compressor. This will eliminate the fans cycling with the clutch. Instead they will be on whenever the AC is requested.




This control starts the fans at 60% power to reduce the load on the alternator, then if the temperature rises it gradually increases to 100% over the next 10 degrees.

These fans run together draw 57 amps for a split second on start-up, then continuously draw 13.6 amps while running at 100%. During AC operation and running at 60% they only draw 10.6 amps.
 


The fans fit very nicely horizontally, but the shroud was a little tall.
I cut the fans shroud down to the top of the upper most fan.





The upper fan shroud was cut straight across the top,
retaining the radiator mounts and just behind the raised section for the stock fan.



The stock upper shroud was cut straight across just in front of the radiator mounts.
The lower lip had to be trimmed 1/4" to move the fans closer to the core and the tabs on the sides were trimmed for width also.
Slots were cut on the inside of the lower lip for inserting 1/8"x 1"x 2 1/4" aluminum tabs, that are attached with 3/16 aluminum poprivets.
These re-use the stock lower shroud mounting.

Total investment: $170 - Time to complete aprox.: 6 hours.

I used 1/8"x 1 1/2" aluminum angle to join the two pieces. Attached with 3/16" aluminum pop rivets, backing washers, and finished with press-in caps.

It is now a one piece direct bolt-in.