Ron Earp
Admin
First off, who on the board is using a Porsche 930 in the inverted configuration? I'd just like a head count so that I might share information and learn a thing or two from you guys.
I'm running a 930 inverted in the Lola. Thus far things have been fine with it and it seems happy. It was rebuilt a couple of years ago and probably has less than 500 miles on it, mostly track miles.
I have asked around to a number of transaxle companies as to how much oil should be in a Porsche 930 box when it runs inverted. The answers have been all over the board - two gallons, four quarts, six quarts, and "fill it up til oil comes out of the half shaft seal". Clearly, all of these answers are not correct. According to a couple of sources I found a Porsche 930 box when run normally has a factory capacity of 3.7 quarts. But I have not found a definitive answer for an inverted box.
I don't really know how much oil is in mine at the moment but I think it is "too much". Mine seems to spit oil out the breather and catch can at speed until it throws enough out to be happy. I'm worried that "happy" might be low on oil. My breather is attached to a short metal tube that is above the gear section of the box. The setup I run does have a cooler and the feed for the pump/cooler is taken from the bottom of the diff area and it is returned in the side of the case in the differential/ring gear area.
I'm running a 930 inverted in the Lola. Thus far things have been fine with it and it seems happy. It was rebuilt a couple of years ago and probably has less than 500 miles on it, mostly track miles.
I have asked around to a number of transaxle companies as to how much oil should be in a Porsche 930 box when it runs inverted. The answers have been all over the board - two gallons, four quarts, six quarts, and "fill it up til oil comes out of the half shaft seal". Clearly, all of these answers are not correct. According to a couple of sources I found a Porsche 930 box when run normally has a factory capacity of 3.7 quarts. But I have not found a definitive answer for an inverted box.
I don't really know how much oil is in mine at the moment but I think it is "too much". Mine seems to spit oil out the breather and catch can at speed until it throws enough out to be happy. I'm worried that "happy" might be low on oil. My breather is attached to a short metal tube that is above the gear section of the box. The setup I run does have a cooler and the feed for the pump/cooler is taken from the bottom of the diff area and it is returned in the side of the case in the differential/ring gear area.