Has anyone successfully attempted this?
I know a few race teams in the past have adjusted the systems but was curious if anyone has gathered any data?
I wanted to adjust the routing. Seems if one was to separate the two systems (Engine coolant/Intercooler coolant) you can have a much better heat transfer.
In current form with the intercooler only able to drop down to engine coolant temp we are quite limited on delta T.
I was thinking about adding a separate tank, (Similar to 2003-2004 cobra setups) and blocking off the line that runs from the heater core into the intercooler heatexchanger. (See photo)

By doing so, you could at least drop the fluid temp closer to ambient

 

I believe there is only a minuscule flow between the two interconnected coolant circuits. If you measure the intercooler fluid temp, it is actually close to ambient already, and heats up primarily when pushing the supercharger hard, not from the engine coolant temperature.

 

Thanks for the input. I have a thermocoupler interface I'm going to wire in for EGT readings the headers I'm building. I plan to route a temp pickup at the inlet to cooler and outlet, as well as exchanger in front of radiator for some good data.

The tube diameter leading from the heater core is small, so there may not be too much impact.
I'll sample some readings at cruising speed and see where the intercooler temps fall.

Thanks.

D. Fricke

 

I've been thinking about doing this as well. Definitely interested in the information you get from your sensor additions. Having ambient (or the ability to ice the system) fluid going through the intercooler has to be better than having 200 degree engine coolant go through it.

 

Fully agree with you.

The guys at RSR seem to agree that separating the system had great results.

I just need to get some fitting for the coolant lines and I'll be ready to data log. I have my DAQ setup and logging other parameters now. I'd be curious as to the temp at cruising speeds and the cool down rate.

I'll cap that heater core return line and see how it impacts the readings.
I'll try to get a hold of Tony at RSR and see if he has any logs of their pursuits with coolant mods.

Regards,
Derek Fricke

 

I have been logging IC circuit temperature and radiator temperature in my 2001 XKR with a similar configuration for years. You will see the circuits are, for all practical purposes independent. The link tube is basically for pressure equalization.

More airflow, a larger reservoir,a better intercooler pump, water methanol injection, or a killer chiller can all improves supercharger performance by keeping temperatures lower, but separating the circuits will do little, if anything. Jaguar engineers were not so dumb as to pump 200 degree fluid through the charge coolers.

Avos, who is one of the forum gurus on supercharging estimated in some calculations a while back that there is well under a 1 degree temperature rise from the connection.

If RSR had great results, what else did they mod?

 

Thanks for the info.
I believe Tony mentioned having a separate expansion tank with a few other mods. I'll see if I can get a few more details and let you guys know.

 

in reality there are inside the connection pipes between the tank and the circuit of the intercoolers, of the non-return valves. practically it is not actually in contact with the coolant liquid of the engine with that of the intercoolers but it intervenes only as a power supply in case of lack of water in the intercoolers. The work I did (on the advice of the Ferlito team) is to modify the outputs of the intercoolers, making them in the back (in addition to the pump with greater flow and the electric fan on the front) so as to increase the flow and consequently the cooling