Hey guys,

I've been looking into going FI at some point in the future, and want to use some kind of roots style blower like the old stillen. Yes, I know centrifugal superchargers or turbos create more boost, but I want to custom fab my own **** and don't want to hear about what is better than what, I want to know how things work so I can make my own design and conquer my own engineering goals.

Anyways, I noticed that the old school stillen supercharger kits typically come with intercoolers, but they're not your typical air to water top mount intercooler as common with most top mount soperchargers. Instead, they use some kind of external air to air intercooler that somehow cools air inside the custom plenum that stillen designed. I've stared at these superchargers for hours and still can't figure out how their intercooler setup works. From what I can see, I see an inlet and an outlet hose on the top of the plenum, and an inlet and an outlet on the FMIC, but seriously how do these work? There is so little readily available information on these old superchargers and I just want to understand how they work.

Again, please don't school me on how these superchargers were inefficient, or how turbos create more boost, or how centrifugal superchargers are better, I just want to know how these old intercoolers worked, I'm interested.

 

Can you still find one of those older Stillen roots style superchargers which required the bump in the hood (Stillen also sold separately):
Would be a cool project.

I had to refresh myself on roots style SCs as these were popular when I was younger in my muscle car days as they were the only option:
Almost any SC can run their intercooler either Air to Air or Air to Water. For the newer Stillen model, Soho Motorsports builds an air to air conversion kit (off the shelf its air to water) with a large intercooler. I bet if you look at the install instructions for it, you could figure out what's needed to convert the older style to use the same kit.

If all else fails, call Stillen (Miza is my favorite) or Soho (Justin here) as both have a wealth of knowledge to share on FI.

 

I actually watched that whole barn find series, but then i found a cooler one:

it looks like some kind of eaton m90 mounted directly to the manifold like the VG33ER from rhe frontier. Stillen still makes roots blowers for the vq40de which iirc is basically a stroked out de with hr heads, but i want to look into making my own kind of roots style contraption like that video i linked above. If there were enough space to remote mount a blower in a vq id try that, but i dont think there is. to push any power above 300 though im going to need to figure out some kind of intercooling system because the air gets too hot at higher pulley speeds sadly.