Quote:
Originally Posted by jbclassix
Liquid-To-Air intercooler between the turbos...
I don't know what your final use plan for the truck is, but here is a quick little story on why you should. When I had my 96 Chevy with the 6.5L on Propane, I knew a guy who had a 12v dodge with sequential turbos. He would not tow a trailer at all. He said he couldn't keep his EGT or engine coolant temp under control with a load on the engine. Well, one day while towing a trailer in my 96 I passed him on a grade. He didn't talk to me ever again. 
His truck could spank mine all over the place. but I could still tow with mine.
Cat C15s run a cooler between the charge air side of the turbos and there are a lot of off-road cummins engines (QSK60 for eg.) that run coolers between the turbos. It makes night and day difference! |
He had 2 turbos on a Cummins in parrallel?
Air to water is not helpful in the majority of cases for multiple reasons on a street truck.
For air to water to work properly there has to be a cooling agent, IE ICE etc. Running coolant from the engine is inneficient. When you consider the air temp coming from the turbo is 750* and a stock CAC/Intercooler can drop it down to sub 200*. If the truck was going to be a competition vehicle it might warrant an air to water. But unless you are pushing over 1000HP and high boost numbers it's not needed, or if you are running a big single.
We built a compound turbo 12V that ran a 57mm charger over a 78mm charger with "435HP" injectors in it that could hardly make 1800* on the pyrometer at WOT. It would build 15psi of boost at 30mph under light throttle. EGT's can vary depending on setup, but properly setup compounds don't need an ATW setup. Air to water is great for larger single charges and helps them spool.
Not to mention the pain in the ass it is to pipe in an interstage cooler. They also are not the cheapest option available. Cheap ATW is not recommended.