Oil pressure / temp limits?

[Muzdaman]

My NA6 oil temps are 95-100 highway cruising and up to about 115 after 5-10 laps at wakefield.

I havent had a chance to run on the track since the oil cooler was installed.

I noted that the difference betwen doing 100 or 110 km/h on the freeway can result in 5-6 degrees hotter oil, so if your highway cruising is higher than 110km/h your temps may be accurate.

[timk]

Where do you have the senders located? That seems pretty warm to me.

[Muzdaman]

My sender is on a sandwich plate in the standard filter spot.

[deviant]

Cruising speed was pretty much on 110kmh for an hour.

My sensor is in the remote filter block which is behind my right headlight, might it have a hot spot in it?!

[Magpie]

Well deviant I have just had my Innovate guages installed (Water Temp/Bat and Temp/Pressure oil) these have been linked into the Air Fuel and then connected to a DL-32 so I should be able to give you some feedback on the temps I get.

I'm using the defaults for all temps and pressures. Oil temp (in C) is 50, 100, 120, 140 with the alarm at 120. Oil pressure is set to alarm at 20 psi. Water temp has been set to alarm at 120 C.

I had the guages installed by MX5 Plus but I got the rest of the system to link together tonight. I can hook a serial cable up and get all the info on my laptop screen (I just need to do the RPM signal and a speed signal and it will be complete). Plus when I link in I can adjust all the guage settings as well

[deviant]

Any updates on your temps magpie?

I went ahead and got a works engineering oil cooler and the temperatures are now much more sensible. I have only tested it on the road so could not give it a sustained thrashing but with a bit of regular driving followed by some fast road use it did not get above 80-85ish. I sat for a few minutes at an intersection after a thrash and it crept up to 90-100 but as soon as I hit the freeway it dropped off to 80-85 again. it used to sit on 110 on the freeway.

[Apu]

Good to hear! Where did you mount the cooler?

[deviant]

Right in the opening of the nose...Maybe an inch behind where the the nose opening ends and the plastic undertray starts.

I had to cut a heap of plastic off of the black trim that is in the nose. I will post some pictures later.

[Magpie]

Following my recent incident with oil cooling I'm going down the path of a PWR combined water/oil cooler.

[plohl]

Following my recent incident with oil cooling I'm going down the path of a PWR combined water/oil cooler.

I tired to find some information on these but had no luck? Can you point me in the right direction?

[Apu]

Following my recent incident with oil cooling I'm going down the path of a PWR combined water/oil cooler.

What happened?

[Magpie]

http://pwr.com.au/#/view=products/st=Other%20Car%20Radiators/sb=Mazda/ Part number PWR5119

The engine needs to be replaced earlier than planned hence why I did not get to QR for the club track day.

I tired to find some information on these but had no luck? Can you point me in the right direction?

[plohl]

Cheers Magpie!

Whats the damage to the wallet on one of those?

Every thread needs pictures

I read up a bit about the pwr coolers a while ago. Everyone seems to have issues with the cap.

[sailaholic]

Did anyone get answers on what is ok? Did some internet searching and found the following from yankee land

I find about 192 to 200 for highway driving, all types of weather. About 20 degrees warmer in traffic or other slower driving. Warmer than my previous Z06, which seemed to run at 165 under the same highway conditions. Not a bad thing, in my view, as I always thought the Z06oil temp was a bit too cold.

The engine builder for my race car (avatar) cringes if I don't have 210 degrees oil temperature before hitting redline (tough to do after only one warm up lap on a cool morning before the green flag flies). And 220minimum is his preference.

If you start hitting 265-270 because you were running it really hard in warm weather, let it cool down to about 240 before shutting it down. It won't hurt anything.

and

My old E39 M5 which also had an oil temp gauge recommended no RPM operation above 4500 until the oil temp reached 170F and stated 265F as the maximum for "track operations."

and this from the makers of Mocal oil coolers and associated bits

Prolonged use of a car engine in conditions where the oil cannot reach its correct working temperature will cause sludge formation and crankcase oil dilution, leading to excessive wear especially in the cylinder bores. Optimum engine power will only be delivered at correct temperatures. The elimination of drag in engines caused by cold oil is a most important consideration, especially with a racing engine, revving the engine without a load will not put much heat into the oil and devices for preheating the oil may not be available.
It is therefore desirable to control of the oil flow through the cooler by a thermostatic device, we call an oilstat, set to divert oil to the cooler at 80ºC (although a wide range of settings is available for special applications). This is the minimum temperature required to evaporate and dispel contaminating substances.

For those who didn't grow up mid last century
F C
170 - 76.67 (BMW min temp for more then 4500 RPM - i think they actually had a ECU rev limit for this from other readings)
190 - 87.7
210 - 98.89 (Quoted engine builder min red line temp)
220 - 104.4
240 - 115.5
265 - 129.4 (BMW max for track operations)
280 - 137.7

I spoke to a number of people and they all said a road car needed a thermostat for an oil cooler to prevent sludging and oil under temps. The obvious exception to this rule is oil coolers that use "engine coolant" as the cooling medium as the coolant helps warm the oil, and then keep it stable.

Nick

[Magpie]

Plohl I'll PM the cost to you.