oil cooler
Turbo Mini Forums

do you have connect the oil cooler ?
i mean do you really need one ?
and one other thing what velocity oil do you need to use a 40 or 30 ??
cheers guys and could you recomend a good brand
THANKS

Yes, you need an oil cooler! The best types are thou with a thermostat so they don't over cool the oil in cold weather.

The reason you need one is that the turbo bearings are massivly cooled by the oil supply, and that extra thermal load plus the higher power output makes one necessary!

Oil wise... I like 20w50 from Millers.

Alex

AlexF

AlexF2003 , sorry but i don't agree with that!

ALL last year I run WITH OUT AND OIL cooler. And had NO problems, it's all in how you drive, cos the willys quick i gets to it's top speeds very fast and the old doesn't have time to heat up!

So stevecoolerking what sort of power will you have?? and do you do much motor way driving at high speeds?? these are questions that need to be answered before you can say if ones needed or not!

As if you do most of your motor way miles at around 60 mph then you Won't need one. It's when you sit at 80+mph for a WHILE that things get hot.


In mine i can sit at 55- 60 mhp all day and the oil temp doesn't go over 75 ish degrees. At Castle combe this year i blasted it round for a 3-4 laps just to see how high the temp would get and it went up to....................


















107 degrees which if your running GOOD synthetic oil which i was, this isn't so bad.
As for what oil grade to use then i do agree that a good 20W 50 is good, It just gives you more lag when cold, but then you shouildn't be driving hard when cold

MW

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

I knew you'd spot this post MW!

alex

Edited by AlexF2003 on 13th Feb, 2004.

AlexF

LOL your right Alex! well one thought one would have a little say

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

my turbo runned very fine , without an oil cooler for one year.
I just selled my engine, and the guy wanted me to rebuild it as new, and so I can write that: a 1275, std pistons and rings , 10 psi's with an intercooler( don't know the power ) which have been hard used from 8 mounth in town traffic, two mini meeting with some hard "test" from friends and some of the customers of my friend who have a mini shop, approximatively 10 000 kilometers haven't suffer from any oiling problem, the bearings need replacement but the crankshaft is as new......
my remark here is , use an oil cooler only if you are sure that it is needed , so use an oil temp gauge, high specs oil ( I'm only using motorbike 10w50 full synthetic oil), and use an oil cooler only if the gauge read more than 100? in the oil sump
fab

Where do you measure your oil temp MW?

Sump measurement is not ideal...

alex

AlexF

What?


Where would you suggest????


The sump is the only decent place to measure oil temp!!!!

Id agree with that dave, i took reading off the pressure feed and with the cold air coming through the grill it distorted the reading. Covered up the grill and the temp went up by 20 degrees! (reading not actual oil temp!)

Im running without a cooler, one i dont think they're really needed and two, saves one hell of a lot of space and gives more room for the intercooler

In the engine post pump :p

The ally gearbox will give an artifically low reading....

alex

AlexF

Everywhere says to mesure it in the sump, via a modded sump nut or probe on the dip stick or something...

How would the alloy sump distorth thsese figures?

You have a gear set in there... its finned alloy in design... so nearer the edges will be cooler than the centre..

As to how much difference is speculation, but if you want to know the real temps you need to look at the oil going round the enigne, so cooler take off would be a good point IMO.

Alex

AlexF

Alex
the oil temp you need to know isn't the one in the oil lines, but the one in the bearings ( bearings heat them so it is hoter than in the lines , and bearings need good oil protection ( not too hot and thin, oil lines not)), and so the direct read for this as it is impossible to read it directly in the bearings, it's just after : in the sump, I agree about the cooling effect of the ally casing, but it is best compared with the oil line .
fab

Alex, I take the reading as it come out of the block and goes to the filter.

A lot of people say about the sump reading and that's hairy muff but it was easer for me to do the above, and I couldn't see where the temp difference would be t much different between the 2, as after all the oils coming straight from the sump as we all know.

But at the end of the day weather it's take a reading from the sump or out of the block or even shuffed up your _rse, any gauge has got to be better then a guess!

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com

agreed!!! Was just interested :)

alex

AlexF

MW mite be worth trying covering up your grill.. as iain says the temp readings were distorted here..

Id say the sump is the best place, it has the largest volume of oil, thus would be much harder for surrounding surfaces of different temperatures to affect it , afterall the larger the mass of the body the more effort it takes to promote a change in temperature. IMHO :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

I measure the oil temp at the big banjo bolt head in front of the engine. I have a front mounted radiator so if your cooling theory is solid my setup may infact show temps too high. Since the hot air passes through the radiator it ends up against the block.

Well, I have an electric VDO gauge and don?t really believe that cooling effect of the incoming air would be that major. Besides, if the oil going to the bearings is too hot it will not have the same properties as colder oil. So basically it is irrelevant where you measure once you see oil temps too high.

My engine shows oil temps around 80-85 degrees at about 60-70 mph, but on a hot day at steady 80 mph on motorway I can get as high as 100-105 degrees. I have done about 33 000 miles with turbo engine and the figures have been consistent. Oil is fully synthetic 10W-60. BTW, some synthetic oils are better thatn the others, with Mobil 10W-50 hot oil pressures were as much as 10 psi lower than e.g. Castrol RS 10W-60.

I would not bother with the oil cooler unless you are going to see hours of track time. On the other hand, leaving the cooler out you?ll lose some credibility at your favourite pub

Hi evolotion, My grill is quite covered up mate, just a thought if oil temps get distorted here that much maybe people should fit a short rubber hose with a oil temp take off, instead of an oil cooler if it cools it down that much.

all the best:)

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com