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| Home > Help Needed / General Tech Chat > oil pressure drops with increasing rpm?! | |||||||
 263 Posts Member #: 115 Senior Member Austria, near Vienna |
12th Oct, 2008 at 06:58:50pm
Hi,
Bimmer Twinky headed and turboed A-Series:
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 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
12th Oct, 2008 at 07:10:22pm
has it just started doing this?
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 11046 Posts Member #: 965 Post Whore Preston On The Brook |
12th Oct, 2008 at 07:45:12pm
Blocked Oil pick up On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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 720 Posts Member #: 2588 Post Whore Pretoria South Africa |
12th Oct, 2008 at 07:48:05pm
Crap stuck in the pick-up pipe gauze causing the pump to cavitate.............seems a long shot i know
Edited by pinkyandnobrain on 12th Oct, 2008. "So wat we gonna do tonight Brain?"
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 3692 Posts Member #: 1833 Formally mini_majic Auckland, New Zealand |
12th Oct, 2008 at 08:43:05pm
..sorry pointless thought it through as i hit post Edited by James_H on 12th Oct, 2008. |
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263 Posts Member #: 115 Senior Member Austria, near Vienna |
13th Oct, 2008 at 06:59:32am
Mini 13, the engine has only 500 miles on the clock - I don't know if it started just now...
Bimmer Twinky headed and turboed A-Series:
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
13th Oct, 2008 at 07:38:34am
I did think that too, i've never run a lump to that kind of rpm.
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 7765 Posts Member #: 74 I pick holes in everything.. Chief ancient post excavator |
13th Oct, 2008 at 08:26:34am
Low pump capacity? On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem. |
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 1346 Posts Member #: 2340 Post Whore Dublin Ireland |
13th Oct, 2008 at 08:46:42am
What he said^^. those figures seem fine sounds like your pump is at the edge of is capacity rover did make a hi capacity for a reason I have never experenced this of yet but I have always used hi capacity pumps from day one on my race spec engines ! On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers. ______________________________________________________ |
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 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
13th Oct, 2008 at 12:17:35pm
duffed pump change it harry
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4018 Posts Member #: 1757 Back to Fucking Tool status Swindon |
13th Oct, 2008 at 04:12:47pm
the other thing it may sounds stupid but how much oil do you still have in your engine... if your running low on oil the pressure would drop from stavation ?? Drives
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 6966 Posts Member #: 507 Fastest A Series Mini in the World leeds/wakefield. |
13th Oct, 2008 at 04:55:11pm
the onlt ime this has happened to my knowledge wa sto my good friend John Haston, as discussed at the time, turned out to be blocked up gauze on the pickup pipe,
Edited by fastcarl on 13th Oct, 2008. |
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2497 Posts Member #: 1954 Post Whore Luton Bedfordshire |
13th Oct, 2008 at 04:59:25pm
On 13th Oct, 2008 Paul R said: Those figures look fine to me. When I fitted my motor with new mains, big ends and cam bearings along with a high capacity steel backed pump it sat at 50psi all day no matter what the revs if anything I would say the engine is a little tight.
the other thing it may sounds stupid but how much oil do you still have in your engine... if your running low on oil the pressure would drop from stavation ?? Thats a point with only 500 on the clock dont you think 8000rpm is a little bit too much abuse too early. I am not saying drive like miss Daisy but still. Own the day
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2497 Posts Member #: 1954 Post Whore Luton Bedfordshire |
13th Oct, 2008 at 05:01:52pm
On 13th Oct, 2008 Paul R said: My other point running in oil does not like too many revs or too much heat!
the other thing it may sounds stupid but how much oil do you still have in your engine... if your running low on oil the pressure would drop from stavation ?? Own the day
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 6753 Posts Member #: 828 Post Whore uranus |
13th Oct, 2008 at 05:07:53pm
harry a thing i have happening on my car is that in cold weather ,the oil pressure is ok at tickover ,but gets lower as revs increase ,then when the engine is a bit warmed up its azll fine and the pressure is the same at any rpm above 2k , this was because i have a tiny oil cooler that couldnt pass the oil when it was thick and cold . Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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1346 Posts Member #: 2340 Post Whore Dublin Ireland |
13th Oct, 2008 at 05:15:35pm
On 13th Oct, 2008 fastcarl said:
the onlt ime this has happened to my knowledge wa sto my good friend John Haston, as discussed at the time, turned out to be blocked up gauze on the pickup pipe, ive used standard rover pumps in the [past and never has a problem # have you just rebuilt the lump, idi you clean the box out of all the shite that usually resides in the bottom of, carl On 17th Feb, 2009 Rob H said:
I find the easiest way is to super glue the bolt to the end of one of my fingers. ______________________________________________________ |
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263 Posts Member #: 115 Senior Member Austria, near Vienna |
13th Oct, 2008 at 05:59:59pm
At 80°C oil temp I have about 40psi at idle - so the pump seems fine to me...
Bimmer Twinky headed and turboed A-Series:
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Site Admin  9408 Posts Member #: 58 455bhp per ton 12 sec 1/4 mile road legal mini Sunny Bridgend, South Wales |
13th Oct, 2008 at 06:19:04pm
On 13th Oct, 2008 TurboHarry said:
I guess all the Miglia boys with their high reving engines use crossdrilled cranks? Harry Not all of them Harry, Don't think that is your problem. Are you sure the oil is draining back to the gearbox fast enough from your head?? Is it worth adding too much oil just to proof this theory wrong? On 15th May, 2009 TurboDave said:
I think the welsh one has it right! 1st to provide running proof of turbo twinkie in a car and first to run a 1/4 in one!! Is your data backed up?? one extra month free for all Turbo minis members, PM me for detials |
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 159 Posts Member #: 1997 Advanced Member Lichfield |
13th Oct, 2008 at 07:24:23pm
I had the same problem on my new engine the other day. it turned out to be the ball bearing in the oil pressure relief valve that was at fault. I replaced it with the original plunger and all is well. might be worth a try |
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263 Posts Member #: 115 Senior Member Austria, near Vienna |
14th Oct, 2008 at 06:52:01am
Hi Monkeh, a friend of mine told me the same yesterday.......thanks for the inputs - will try the higher oil level and plunger idea first before dismantling the engine. Bimmer Twinky headed and turboed A-Series:
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12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
14th Oct, 2008 at 06:12:27pm
Ah,
On 28th Aug, 2011 Kean said:
At the risk of being sigged... Joe, do you have a photo of your tool? http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1 https://joe1977.imgbb.com/ |
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 8297 Posts Member #: 408 Turbo Love Palace Fool Aylesbury |
14th Oct, 2008 at 07:47:42pm
Best bet would be to just fit the standard shuttle and spring jobbie back in? https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel
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263 Posts Member #: 115 Senior Member Austria, near Vienna |
15th Oct, 2008 at 07:37:18am
Will fit the standard stuff this weekend and see what happens...
Bimmer Twinky headed and turboed A-Series:
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263 Posts Member #: 115 Senior Member Austria, near Vienna |
18th Oct, 2008 at 05:08:22pm
Test is done: with the original spring and plunger the effect is less worse! At hot oil (90°C) the oil pressure at idle is less now (about 2.5bar instead of 3 bar) and at high rpm (8000) the pressure drop is only from 4.5 bar to 4 bar now.
Bimmer Twinky headed and turboed A-Series:
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6966 Posts Member #: 507 Fastest A Series Mini in the World leeds/wakefield. |
18th Oct, 2008 at 05:46:43pm
On 18th Oct, 2008 TurboHarry said:
Test is done: with the original spring and plunger the effect is less worse! At hot oil (90°C) the oil pressure at idle is less now (about 2.5bar instead of 3 bar) and at high rpm (8000) the pressure drop is only from 4.5 bar to 4 bar now. Very interesting.....thanks for your inputs guys.... Harry, try this , drop the oil out, take off the pipe from the filter housing to the top of the block,[feed pipe.] blast an ail,line down it, if anythings stuck on the pickup gauze it will be blown clear, this is how John Haston did it and it worked, this was after MED took 2k off him for a rebuid to cure said problem , that was still there once retured but d minus the 2 grand, carl Edited by fastcarl on 18th Oct, 2008. |
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