'55 Chevy 3800 Cummins

[xj_man_646]

Originally Posted by 6DoF

the cooler charge will help the 2nd turbo efficiency, you are compressing cooler denser air. you also end up with less heat load for the main cooler to deal with.

Old Smokey F1 is the easy example to find. he had a water-to-air mid stage cooler, and the air-to-air final. he also had a MASSIVE rear mounted rad for the engine cooling, reverse of me. shame that truck got so wadded up again.

https://speedhunters-wp-production.s...0-1200x811.jpg

That picture looks like the charge goes from the water to air, to an air to air. Not into another turbo before the air to air.

edit: I went to find another pic of it. You're right.



Was this thing built for Pikes Peak? Makes sense if so; at altitude, the compressors need to work harder to build the equivalent boost as sea level, which causes excess heat in the charge, lowering your manifold air density and reducing power.