My SPF fans kick on around 90C and you can hear them pretty clearly in the background if you are going slow or stopped. Flick on the fan switch to hear what they sound like if you are not sure. I wouldn't expect cooling to be the issue with this SPF. Your issue will be the next time your EFI needs a tune. Did you say $9k to tune the EFI? Back up the truck dude! I have heard you need to have someone close by that knows how to tune the EFI. Interesting the $9k tune and you have the hot idle at 1,000 RPM? My Roush SR idles at 800 when hot and sounds really cool. Totally different sound then 1,000. The water temps should stay below 100 C and the
oil temps should stay below 200 C given the excess cooling capacity of the SPF. I think the engine will operate perfectly fine with
oil temps anywhere below 250 C, but I've never seen my
oil get that hot. Good luck!