water mist or intercooler

[Goldsburg]

...The flowrate spec is useful because you want an IC that does not cause excess restriction at the highest airflows your 6.5 will see...

With that being said, an intercooler that provides little restriction will not be as efficient. This is because the intercooler has to up the air speed to turbulent flow so as to get good "scrubbing" of the air to the interior surfaces of the cooler. If the air is not turbulent, then a boundary layer can form and efficiency will suffer.

I would recommend sizing for 2.0 to 2.5 PSI max drop at full tilt (max fuel max RPM). This should equate to approximate 1 to 1.5 PSI drop when towing hard. In other words, cram the largest IC into the space that you have between the front frame rails, tilt it on a 30deg angle, and call it good. :smile5:

Regards,

 

[buddy]

Additional consideration for IC vs WMI, ICs need air, slow crawling you won't be getting much air, but you also won't be doing much boosting needing cooling, but WMI adds power when flow would not be present and no impact worries,

This is a good point. If you need it for pulling uphill and only going 35mph pusing 10psi boost the water will be more effective all the time.

 

[SmithvilleD]

Just posted the info below in response to Kane's discussion in the dyno results thread. Figured it's logical to copy it to this IC - WMI thread as well.

Compressor efficiency differences do impact outlet charge air temps, but temp increases due purely to compression are the biggest factor in charge density.

One of the better charts I've seen illustrating the relationship is in Turbo - Real World High-Performance Turbocharger Systems, from SA Design.

Here's a link to 2 pages - showing the relationship btwn boost & density ratio (how much the compressor increased charge density above ambient air pressure).

http://paceperformance.com/ProductIm...sa123chpt3.pdf

The 2nd chart shows the relationship with aftercooling & how much charge density the aftercooler regains.

The book goes on to include both charts overlaid, which makes the difference much easier to see, but I couldn't find an online source of that page. To get the idea, just go to a few boost points - say 5, 10, 15, & 20 on the non aftercooling chart & note the density ratio for these 4 points. Then go to the aftercooled chart & note the density ratio of the same 4 points.

For those wanting more IC discussion, here's a link where you can download a useful primer on IC's from Spearco:

http://www.turboneticsinc.com/all_about_intercooling