Some background first for the non followers of the trials of Velociabstract. IAT's run hot. Car runs hot. See Les scratch head. See Les rethink all he's done. See Les chase his tail. See Les with 3 heat exchangers. See Les with new thermal coated intercooler. See Les with a new intercooler pump. See Les pump water out of his separated intercooler circuit on track. See Les going in circles. Les is tired. Les is frustrated. OK people. Now that we're up to date here's my sacrilege. I reconnected the cooling and intercooler systems. Yep, did it. My current setup has an E55AMG heat exchanger, brand new Bosch 010 intercooler pump wired to be always on. I removed the supercooler to lower my engine water temperatures (cooler air to the radiator) and ever since that day I overheat the intercooler water on track. (ECT's dropped a few degrees) Before reinstalling the supercooler I've been doing some experiments. I can tell you that with the stock heat exchanger, E55 heat exchanger and supercooler the IAT's end up within 5º of one another on the street with a split system. I can tell you the system needs to be pressurized if your going to be WOT for 8 minutes and up. Even if your sensor is saying 180º you have hot spots over boiling temperature. If you run a remote reservoir it needs to be pressurized or your going to squirt water out the top. The supercooler has a pressure cap so in my mind it's pressurized, to be clear about that. My experience with all the combinations up to now is that the difference between the huge capacity heat exchangers and stock is the time it take to reach and hold a temperature. The difference between a new pump and old pump is the time it takes to reach and hold a temperature. That temperature, with all other conditions being the same is identical. It just takes longer to reach it. Next step, depending on what I learn in the next few weeks, will be to re install the super cooler with a connected system. Then perhaps split it again. Then perhaps fab up a remote reservoir that's pressurized a la Brian Brave for instance. (Why o why didn't I do that in the first place) Saludos Brian! Track day is Sunday. I sure want to run all three 20 minutes sessions without having to slow down because of IAT's or EGT's. Let's see what happens now that the systems are returned to SRT's engineers design.

Les