I originally wired mine threw all the OEM connections and quickly learned that running 2 SPA fans would continually blow the fan fuse. The SPA fans I have draw 13 amps a piece. Although this totals 26 AMPS and it's a 30 AMP fuse circuit, the system couldn't handle the surge. So the changes I made was to use the OEM temp sensor to run the fans at temp and also bypassed the low speed fan resister (1 fan only in my case) When temp hits the 178 degree mark, they both come on. I also wired both fans through dual relays directly to the battery.
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Yes, this shroud seems to be working perfectly.
I did try at one time unplugging one fan when we were doing the testing. But what I found in the version 2 MASIV is that it was fine as long as I was driving the car on or off track. The problem I encountered was stop and go traffic and cool off times after a track session. One fan was just not enough to cool my car down, but I really believe this was just a situation of the turbo generating so much heat that when coming off the track that it just couldn't pull enough air through the radiator to cool it down properly or quick enough and it would just linger at over 200 for quite some time.
It's something I should try again with the MASIV version 3.
Yes, plan on totally sealing every thing around the MASIV now.
Hmmm, that's not a bad thought about using both side vents for airflow through an oil cooler. I am going to look into that. Just have to figure out where to mount the air to oil cooler. Most of the plumbing is already in place, will just need longer hoses.
Yes, I still have AC 
(From another post)...which I was considering removing, welding AN bungs on both AC condensers and using them for air to oil cooling.
