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IAT 2 question for X308 XJR owners. What is a typical IAT2 for these cars? I have never had an intercooler that shared coolant with the engine so normally I will see them about 30* above ambient and go as high as 100* above ambient but recover quickly after a run on those cars. Since this car shares the radiator coolant I would imagine that it will be higher. I want to data log a bit and see what I have vs what most others see. Debating about the pump upgrade.
The intercooler and engine coolant loop flows are largely isolated from each other, really only sharing the overflow tank and a t-fitting between the two for balancing pressure. Often on my car, if driving calmly on a 70 degree day, I can pop the hood immediately after driving around and the intercoolers will be cool to the touch, even with the engine up to temp.
I've heard good things about the upgraded pump, don't know anything about the ebay heat exchanger though.
The ebay cores are direct ripoffs of the Eurotoys one just 1/6 the cost. Several companies sell them and looking at feedback on the cooler they seem to be good. I can get one and if it leaks its no big loss. Just dont want to drop over a grand for one. Texas is just so hot in the Summer that i want to do all I can to keep the car from heat soaking the blower.
In all honesty I can not say I notice any difference, but then again we now live in the Netherlands. Getting too warm is not really an issue here.
Having said that, I drove this XJR for three years in Kansas City and it gets pretty hot out there driving through the prairies.
With a bigger charge cooler radiator and higher flow electric pump, you will see no difference in one time or a few times hard acceleration. The original system can cope with it. What an uprated radiator and pump provide is that you can accelerate repeatedly and for a longer period of time before the intake air starts heating up resulting in reduction of performance. So, the upgrade will not give you any higher power, just somewhat longer duration of the full performance as compared with the factory setup.
Yes, I was shown where my thinking was wrong and now that I see the layout I know what i want to do. Do you wish for me to delete this thread because nobody will ever have this question again?
I was agreeing with what the previous poster said. It dont add power but keeps you from losing it which is my goal.
What I would like people to say is what typical IAT2 temps they are seeing. That still has not been answered. I was curious how quickly the cars heat soak and what (under normal driving) they usually have for an IAT2.
I suspect almost no-one has checked IAT2 values because until recently few tools would report them. (Also, few owners care.)
It's a good idea, though, and has been discussed for various Jaguars but generally not done (or not posted). At the least, armed with the values you could then try improving the SC cooling circuit (or some other way of cooling) and see what the values do.
That diagram is interesting ? My bleed from the Intercooler goes to the tank ... not back to the SC
Also -- one would have to measure the temps. Bigger pumps and flow don't have to = lower temps. The water flow has to match the delta you want .. greater flow can actually increase temps if you flow water through the heat exchanger too quickly and it does not have time to cool. Also -- you don't want to modify the flow .. pumps in a closed system don't really pump .. it's differential pressures on the low side and this could pull water from the engine (hot to cold)
I'm not saying this is occurring -- it would have to be checked
Typical IAT2 temps?
