Davesvroadsport Posted September 21, 2020 Share Posted September 21, 2020 Currently running a K-Series with a wet sump. Considering a set of slicks for next season, however am very aware of centrifugal/centripetal forces working on the oil in the engine. I have a seven litre Apollo tank fitted and was wondering if that sort of volume wound be sufficient to keep the engine sufficiently charged with oil during long corners....Thanks - Dave Link to comment Share on other sites More sharing options...
Tazio Posted September 21, 2020 Share Posted September 21, 2020 One thing to consider Dave, that when Caterham Midlands ( the original one owned by Derek) were originally testing ACB10s on wet sump cars, at Mallory, they were running the bearings in two laps......though I have no idea whether the cars had Apollo tanks fitted. Link to comment Share on other sites More sharing options...
Leadership Team Shortshift Posted September 21, 2020 Leadership Team Share Posted September 21, 2020 I think, in Dave's case, that the mediocre coefficient of friction between rubber and wheat will afford some protection against oil starvation, no matter how wide and sticky the tyres... James Link to comment Share on other sites More sharing options...
Guy Lowe Posted September 21, 2020 Share Posted September 21, 2020 After following you on the sighting laps at Brands Hatch, I would ask yourself if you will stay on the track long enough to get any heat into slicks Dave Link to comment Share on other sites More sharing options...
Davesvroadsport Posted September 21, 2020 Author Share Posted September 21, 2020 Coming from you!(Spun off at Cadwell on first corner of Mountain during sighting lap!!!) Link to comment Share on other sites More sharing options...
Davesvroadsport Posted September 21, 2020 Author Share Posted September 21, 2020 @# 3Mixing farming with driving was an efficient use of my time! Link to comment Share on other sites More sharing options...
SM25T Posted September 21, 2020 Share Posted September 21, 2020 Multi-tasking ! Link to comment Share on other sites More sharing options...
Doctor Posted September 21, 2020 Share Posted September 21, 2020 Don't listen to them, Dave. Link to comment Share on other sites More sharing options...
Area Representative Richard Price Posted September 21, 2020 Area Representative Share Posted September 21, 2020 Back to a serious note, it's worth noting that the purpose of the Apollo anti cavitation tank is to help remove air bubbles from aerated oil, and oil pressure is only provided when the tank is full. It does not protect against oil surge as a dry sump system does.I know a few that datalog oil pressure on track have certainly seen significant dips in oil pressure with Apollo tanks with less grip than slicks may provide.That said, I also know of at least three VHPDs with dry sump that have suffered big end failure on track, most likely due to the comparatively small capacity of the bell tank. It's important to keep a close eye on oil level during a track day! Link to comment Share on other sites More sharing options...
Ivaan Posted September 21, 2020 Share Posted September 21, 2020 Club trackday rules don't allow slicks unless you have a full cage. Link to comment Share on other sites More sharing options...
Doctor Posted September 21, 2020 Share Posted September 21, 2020 I should be all right then. Not sure about this though - seen plenty of cars on slicks on trackdays over the years. Link to comment Share on other sites More sharing options...
Leadership Team Shortshift Posted September 21, 2020 Leadership Team Share Posted September 21, 2020 "Club trackday rules don't allow slicks unless you have a full cage."No, sorry, that's not right. The TSRR document covers matters like this. The use of slicks is generally permitted when the weather is fine and the track is dry, subject also to the go-ahead being given by the Club Trackday Coordinators responsible for managing the event.James Link to comment Share on other sites More sharing options...
L7 FST Posted September 21, 2020 Share Posted September 21, 2020 When I had an SLR (wet sump; Apollo) a few years ago I used to to run it on slicks at track days - vigorously, regularly and without mishap. Two things were essential before I did this, however: first, fitting a mechanical OP gauge that would give instant and accurate readings to reassure me that pressure remained healthy; second, sorting out a previous problem I'd experienced with oil pressure dropping noticeably on fast left hand corners. The solution to that problem was to RE-INSTALL the sump baffle foam that I'd previously removed following conventional wisdom re the K-series. For me at least with my VHPD, no foam meant oil surge; foam re-instated meant reliable oil pressure, and slick tyres....Thousands may beg to differ, but this was my own experience! (....before I opted for the safety of a dry sumped Duratec)Stephen Link to comment Share on other sites More sharing options...
Davesvroadsport Posted September 22, 2020 Author Share Posted September 22, 2020 Thank you Stephen!Still cautious though..... Link to comment Share on other sites More sharing options...
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