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Home > Help Needed / General Tech Chat > oil pressure drops with increasing rpm?!

minimole23

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Wiltshire



On 18th Oct, 2008 fastcarl said:


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


I think I'm gonna try this as I'm sure there is some crap stuck to my oil pickup. Is there any reason not to do this with the oil warmed but in the engine, just so the crap is carried out when I drop the oil afterwards.

So you blow the air down towards the block end of the pipe rather then ttowards oil filter housing?


Cheers
James

Edited by minimole23 on 28th Oct, 2008.

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


fastcarl

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Fastest A Series Mini in the World

leeds/wakefield.

yes down the block,

carl

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TurboHarry

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Austria, near Vienna

This weekend I changed from the TranX diff back to the Quaife, I had the chance to look at the oil pickup pipe trough the diff housing - its perfectly clean!
I also remembered that for this engine I used a different Turbo oil pump - the Minispeed Turbo Oil pump that I bought some years ago...

How does the oil pressure behave if you suck some air into the oil pickup oilpath? (Trough a Seal or damaged O-Ring...)

Cheers
Harry

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm


Jimster
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455bhp per ton
12 sec 1/4 mile road legal mini

Sunny Bridgend, South Wales

Why the change of diff's Harry? TranX a bit rough for the road?

Team Racing

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


TurboHarry

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263 Posts
Member #: 115
Senior Member

Austria, near Vienna

*smiley* I hated the TranX (I had the full race version) for Road use - also in our Auto Slaloms I had the feeling it induces to much understeer at tight corner entries - my car was hard to drive: at corner entry understeer and thanks to my race rear rollbar a quick change to oversteer.
I would use the TranX only in circuit racing where you have to ride over the curbs....

Bimmer Twinky headed and turboed A-Series:
http://www.minifreunde.at/harry/projects.htm

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