The existing Panhard oil filter mod I created works well at lowering the oil temperature, but there was a nagging doubt that all was not as good as it could be, because on a longer run the temperature would climb, but drop when the revs were dropped. It looked like an under capacity issue, and although you can add oil coolers, the Panhard race cars went to a double sump arrangement. This was an additional sump casting that attached to the existing and was held in place by longer studs.

To test this out, I would need to make a mod to my existing Panhard oil filter to accept a double pump, because just making a longer inlet an adding an external filter, would reduce the ground clearance, and possibly cause another issue when the filter got hit. In reality, a PL17 would be OK, but I decided to look at this further, especially when Ron Tyrrell offered a double sump casting and double pump for me to work with.

Eventually I used a variation of this internal filter, and a shortened oil pick up from the standard external oil filter kit, and made a new sump plate on the lathe. The slight bump in the middle was to centre the internal oil filter, when you attached the sump plate to the double sump.







The sump plate was substantially thinner, but the oil changing was going to be messy, because there was no drain plug fitted.

In conclusion, the new filter arrangement worked very well in Ron’s car, and oil temperatures were consistently lower at speed, and did not climb into the higher levels he had seen previously in motorway work. He is convinced the increase in capacity is the correct way to go, because if it was a flow rate issue, the oil temperatures would stay high. Unfortunately, double sump castings are rarely available, but anything you do to increase the oil capacity of these engines will be beneficial.