Leadership Team RogNeedham Posted June 1, 2007 Leadership Team Share Posted June 1, 2007 on Donington track day yesterday generally going well after about 3x 20 min sessions with engine running in high rev renage 6-8k and beyond at times...my passneger suddenly points to the pressure gauge which has dropped to 20 from the usual steady 75ish. in the paddock take the oil tank lid off and the oil seems hot - steam etc. No obvious damage to the oil cooler . track day at Cadwell a few weeks ago - no problems at all. I put the car on the trailer and drove 25 mins home. Starting the car to go up the drive and into the garage the pressure seemed ok again at 70ish. The engine is all steel 1800 xflow with steel internals etc. New Mobil 1 about 1000mile ago due to go on a big Euro road trip on 9 June so i'm a bit concerned any ideas Link to comment Share on other sites More sharing options...
Peter T Posted June 1, 2007 Share Posted June 1, 2007 Sounds like cavitation. What design of tank have you? R500 260 BHP Mango Madness Link to comment Share on other sites More sharing options...
Leadership Team RogNeedham Posted June 2, 2007 Author Leadership Team Share Posted June 2, 2007 thanks Peter - not sure of the make. I'll take a picture and send it. But it's about 18inch tall by 8inch diameter - baffle about half way down Rog Link to comment Share on other sites More sharing options...
Leadership Team RogNeedham Posted June 2, 2007 Author Leadership Team Share Posted June 2, 2007 Peter I've done a search on cavitation so understand the principle. I just wonder why this would have happened at Donington but not at Cadwell in April, Oulton Park last year, or at The Ring a couple of years ago Rog Link to comment Share on other sites More sharing options...
Graham Perry Posted June 2, 2007 Share Posted June 2, 2007 Take it for a long uk road drive in the next day or so to see if it replicates, if it doesn't then its probably going to be okay That way if there is a problem you have a short while to make a decision Link to comment Share on other sites More sharing options...
Leadership Team RogNeedham Posted June 2, 2007 Author Leadership Team Share Posted June 2, 2007 that's just what I was thinking....so once the new alternator is fitted I have a nice little blat route that should allow me to test it.....and see what happens Rog Link to comment Share on other sites More sharing options...
PAC Posted June 3, 2007 Share Posted June 3, 2007 Funny, -well not!- but mine did the same out on a hard blat yesterday. The pressure suddenly dropped -about a Bar- right across the range. It wasn't just the gauge, as the warning light flicked on during tickover. Have not investigated yet, but I was going to start with the sump strainer & filter. Will let you know.... Paul Link to comment Share on other sites More sharing options...
Peter T Posted June 3, 2007 Share Posted June 3, 2007 Roger i mave replied to your mail. R500 260 BHP Mango Madness Link to comment Share on other sites More sharing options...
PAC Posted June 3, 2007 Share Posted June 3, 2007 Just fired her up....... Back to normal too Maybe some cr@p under the relief valve nose? Paul Link to comment Share on other sites More sharing options...
Johnty Lyons Posted June 3, 2007 Share Posted June 3, 2007 I may be stating the obvious BUT when Synth gets hot it gets thin [it still does its job]and when it gets thin it escapes easier from journals so the pressure drops This IMHO is what you are experiencing No big deal but if you are expecting to continually thrash and boil your oil it may be time to think about a cooler or a laminova. Just my senile meanderings jj N.I. L7C AR 🙆🏻 Membership No.3927. Link to comment Share on other sites More sharing options...
PAC Posted June 3, 2007 Share Posted June 3, 2007 I've been driving my car hard for five years now. ( 😬) Have never had the oil light come on -even on track days. So seem to be 'an event' of some kind -in my case. [ ] Paul Link to comment Share on other sites More sharing options...
Leadership Team RogNeedham Posted June 3, 2007 Author Leadership Team Share Posted June 3, 2007 Johnty similar comments to PAC, my car has been driven hard on Cadwell/Oulton trackdays for the last 3 years and at the Ring - I've never seen this type of pressure drop at high revs. I also have an oil cooler. just got back from a 30 mile blat up and down the local d/carriageway and noted the following: 80mph 4k rpm 65 lb/in2 80 deg c Peter - thx, have emailed back Rog Link to comment Share on other sites More sharing options...
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