DaveEscos

how good is a std genuine cos oil pump??

from my block, to remote housing, to laminova back to block.. is apprx 2 to 2.5 metres

will the std cos oil pump be able to deal with that?


cheers

Dave

DaveEscos

no-one?

Damo V

you will know when its running lol

Matt

dont know if the same logic fits pal but my oil pump (new std ford) was modified before fitting to give a higher pressure because the engine was having a 19 row mocal oil cooler fitted

before the cooler was fitted the pressure was silly high, once the cooler was fitted the pressure is back to a standard engine with no cooler

dont ask me how the pump is modified cos i aint got a clue

DaveEscos

cheers matt

any one else/?

Andreas

Just fit a stiffer spring to the pressure realise valve.

Curious to hear the tuners opinion on this as I thought flow was more important than high pressure? Off course you need enough pressure but if its within the spec what are the gains of running higher pressure?

Damo V

You sure yours isnt modded?? TBH its a little late now anyway, as the sump etc gotta come off unless you were thinking of going for an additional electric pump to aid flow

abdr500

iTrader: (1)

cossy pumps are pukka

Ginge !

OI!!!!!!!!!! i do the pointless replies round here

Matt

im sure ive heard the mention of shims when talking about this with tim, but this was for a cvh pump

no gains of running higher than recommended pressure, dangerous infact, this is why we fitted the oil cooler to mine asap

Karl

Hi Dave and Matt,

Actually Matt yours is not std pressure now, its 65psi. Standard is around 55psi.

Without the cooler it ran around 72 - 75 and this is actually too high. The reason for this being too high is because when running at high pressure there is additional heat put into the oil. This combined with the high localised load on the oil in the actual bearings can cause oil scorching causing the oil to literally burn up and provide little hydraulic support to the bearings.

Hence the pressure I advise for any high power cossie engine is 60 - 65psi when the oil is at the normal working temp of around 80DegC.

Anything much lower is not really advisable and certainly anything below 50psi when the oil is hot is a recipe for disaster.

(All the above pressures relate to the pressure achieved once the pressure relief valve has opened and not the pressure at lower rpms.) In reality what is important is that your maximum working oil pressure is achieved before the engine produces signifcant boost/torque.

Rick

Sorry to hijack - but what about cvh's as they tend releive lower.

Karl

Rick,

With cvh's you have to be carefull as the rotor is a large diameter so trying to run high oil pressure and high rpm causes serious cavitation issues!!!

On the cvh I aim ideally for around 50 - 55psi when hot, and again as long as it makes this pressure by the time its on boost all will be fine. Anything around 45psi and lower is asking for trouble on high power RST's.

Matt

well there you go, i learn something about my own car everytime i talk to you lol

off topic....she moves again this week

Karl

Time for a new turbo and remap then Mathew!!!

Matt

a mixture of women and holidays mean no more cossie money for a while im afraid

DaveEscos

Hi Karl,

so in your experiance, im assuming my harvey gibbs rebuild has a new STD cos oil pump.

would this be sufficient to flow oil around 2 metres - ish for my laminova set up??

cheers

Dave

Karl

Dave,

Hard to advise but:

If your engine has a std pump fitted then I would check whether or not it has an uprated relief valve spring. If it does'nt then I would advise fitting one since you may end up with no more than 50psi oil pressure when using your oil cooler and a std pump and I would'nt recommend this with a high power engine.

DaveEscos

thanks Karl , ill get on to that tomorrow

Stu.H

does that guy never get fed up of whacking the crap out the other guy in ur avatar, Karl?

Expect a call soon m8

Fiecos Dan

Karl,


as your quotin oil temps of 80 oC, is the quoted pressure needed the same at 110 oC oil temp?

as 105oC in my cossie, in 27oC ambients after a hard 20min track session.

Karl

For any track car you should aim to keep oil temps at 100 to 110Deg MAX. Anything over 110 DegC should be considered excessive for track use. (i.e. if you see 120+DegC oil temps then you should consider a larger oil cooler)

Ideally as long as you're still making 60psi at these temps everything will be fine. Remember excessive oil pressure does as much harm as excessively low!!

If you are seeing less than 50psi with very hot oil under full boost then your oil system needs modifications.

markk

iTrader: (2)

my oil temps on a very hot session can see up to 140 deg , the pump is std i have no problems with oil pressure what so ever on a std pump, i have never seen the need for upping the actual pressure in any oil system, as has been saud before oil capacity is everything, high pressure will actually cause you more problems than you can imagine. for anyone really that interested, do a little research on the likes of top fuel dragsters and F1 cars for engine internal pressures

DaveEscos

i just want to be confident that the std pump will actualy push the oil for 2 metres through my laminova and back to the engine..???

markk

iTrader: (2)

p.s my car also has over 2m of -10 pipework for the oil system, 16 row cooler, 0.5 litre filter and has a very good pressure at al revs/temps.

have a look at the oil thread of rods, good oil , frequent changes are a serious key to good pressures

DaveEscos

and thats a std pump yes Mark?


hopefully mine will be fine then

markk

iTrader: (2)

totally std mate

Fiecos Dan