Dry Sump

[roba]

Hi

Im dry sumping my RB30 and my engine builder recommended using 'Signal Seals' for the rear main, front timing cover and cams which are designed to work under vaccume.

Is this necessary?

What have you guys used in the past?

Cheers Rob

[dazmo]

Mate no need to use special seals. I have built several dry sump RB26's with my own dry sump kit and run them for several years now on track cars with no issues the only time you will have an issue is if you try and run to much vacume. I have not seen any dry sumped GTR's run vacume regulators on them and have not run one on my own car to date but plan on fitting one soon. From all of the research i have done and spoken to several race engineers around 12 inches of vacume is about the ideal amount to run for power production before you will have any problems with seals.

[3LGODZILA]

stupid question: can some1 give a good explanation of a dry sump?

[T04GTR]

what about piston pin oiling? any dramas? what level of vacuum does this become a problem?

ps is it spelt vacume,vacum or vacuum?

[r33_racer]

The last one is how its spelt. Vacuum.

I had heard it wasnt till around 18-20inhg where you need seals and forced pin oiling. But that came from an ex toll racing cnc machinist, so who knows if its accurate. I think most supercars run around the 20inhg.