Hello all. This may be nothing but it struck me as odd.

Often times after driving I'll put my hands on each bank of the supercharger and be amazed that, while warm, it's not too hot to touch.

Today I went for a drive and when I backed into the garage and opened the hood with the engine still running the supercharger banks were cold! All of the coolant lines running in and out of the supercharger were cool to the touch. Fuel trims near zero at idle and coolant temp at 203.

It drove normal and was as fast as ever. The last several miles before home were at low speeds along with extended idling so the supercharger wasn't getting heavy use, but for it all to be cold just seemed bizarre. The middle component of the supercharger was warm but the outer components were cold (sorry for the unprofessional terminology).

 

Mine are the same way during the cold weather right now. Center section warm but intercoolers are cool after driving. Means the intercoolers are doing their job!

 

That tracks...

The temperature has dropped a lot in the last few weeks.

Thanks

 

The 'middle component' is the duct that sends the flow into the 'side components' which are the intercooler bricks and then down into each bank of the engine.


The cold ambients will be a major factor and also-the Jag, any car for that matter, even at 75 mph the XJR is needs only about 39 bhp of its 370 bhp to maintain that speed. So automotive engines are pretty under stressed.

 

Started mine this morning with frigid 3 degrees Celsius and saw condensation form on both intercoolers and top plate. It's odd to see these things at first, but I'm far from alarmed because the simple physics in it means it works beautifully, and the performance is there compared to a high degree summer day - engines love cool damp air