racerxrx7

I just recently put i a gauge to meter my oil temps and was wondering what temperatures you guys are seeing during normal driving, on a road course and so on?

I'm running dual Mocal 15 Row oil coolers. I just wanted to make sure the system is working.


Any body seeing major pressure drops with these types of setups?


Aldo

thetech

iTrader: (1)

You should aim to be around 200* or below ideally. I would say 220* is about as hot as you should be taking it, and 230* is time to back off a little. Mazdaspeed says 210* in the pan is too hot for reference.

rotarygod

iTrader: (1)

Where are you measuring oil temp at? Before or after the oil cooler?

racerxrx7

I have an Oil pedestal where my sensing unit is located. I can't remember the flow path. I would expect the oil is coming out of the oil coolers and into the filter housing. What is really weird was that when I first intalled it, It registered around 180 and it would drop considerably when in motion (obviously due to the air passing through the coolers) Then all of the sudder in started reading in the 230F. This is not even pushing the car hard.

I wonder if the thermostat is not working correctly.

Aldo

Turbo23

iTrader: (4)

At the rolex GT race at thunderbolt in NJ the #70 speedsource car lost a oil cooler early in the race, and ran for 2 HOURS ON 280 DEGREE OIL TEMPS! For me I would say 220-230 is hot, but 280! Who says rotaries suck!

Chedstar

I would not run over 220F. It has always been my understanding that temps over that will start to hurt bearings. Although a friend bought a new Fluidyne cooler that was to small, he ran two race weekends with Amsoil, temp was at 230F going into the engine. Does not seem to have hurt the engine, but I sure would not have done that.

gracer7-rx7

iTrader: (16)

FYI This is an old topic and there have been a few good discussion on this in the past if you want to search for them.

Where you measure oil temps is important
- before or after oil cooler?
- as it enters or leaves the engine?

Just quoting a number w/o that perspective is not very useful. Most good oils can withstand temps around 250F. Its pretty normal to see temps in the low-mid 200s or higher on track depending on your cooling setup. Heck, an Audi I owned with an oil temp gauge typically ran at 225F on the street. No idea where the measurement came from but didn't really care.

thetech

iTrader: (1)

My understanding is that you do not want to compare piston and rotary engine oil temperatures. I know the C6R racecars run oil in the 260*+ range, which is definitely not advisable.

TrentO

Measured at the fliter I'm seeing 220-230 when I'm pushing really hard and there aren't a lot of big straights. With a few straights I drop down to 210.

-Trent

AlexG13B

iTrader: (7)

http://www.teamfc3s.org/main/factory...ion_system.pdf

i cant open it on my old laptop. so if the oil filter pedistal before or after the oil cooler?

Gene

iTrader: (1)

Reted's chart of temps and locations is here:

http://fc3spro.com/TECH/MODS/EL/GAUGES/otemp.htm

Speedsource can afford to tear down the motor and replace whatever they burn up after the race if staying in with the motor cooking itself means they can win.

AlexG13B

iTrader: (7)

so the filter pedistal is AFTER the oil cooler

peejay

The oil cooler is the first place the oil goes. This is nice since all oil gets circulated through the cooler, and THEN it gets dumped by the pressure regulator. So a good chunk of now-cooled oil gets dumped right back into the pan and gets another pass through the oil cooler.

Bearings generally don't get hurt until the 300deg range. The oil seals definitely don't like hot oil, though, and someone on NP found that power starts dropping off significantly after about the 180deg point due to reflected heat from the rotor affecting VE.

jkstill

iTrader: (11)

That seems a little strange. The motor is only fully warmed up when the oil temp gets to 180f. Got a link for that where it's explained?

j9fd3s

iTrader: (3)

once the oil gets too hot it cant cool the rotors.

thetech

iTrader: (1)

230* is definitely beyond my comfort level, especially at the filter (you are probably 240-250* in the pan).

designfreak

Well it isn't just the C6R guys...The stock C6 z06 guys are seeing temps around 260 if not higher, although Im deff not comfortable in the 200s in my car. Highest ive ever seen was 230 and I shut it down immediatelly. mine runs around 200-2005 at the most now

racerxrx7

I took apart my Mocal Thermostat come to find out that it was stuck in the closed position. I put it back to it for a drive and the highest I could get the temp was 150F.

know it's working.

Aldo

Rotary Noob

My C5 Z06 ran up to 289 (max on the gauge) in the 5th session at the Volvo Track day at Thunderhill...I got it off the track and drove around the paddock with the hood popped till I saw it start dropping. Definitely was not a good thing when I saw the gauge pegged. I took the rest of the lap slow, in a bigger gear. 5th I believe.

My RX no longer has any cooling issues whatsoever now that my hood is vented...still on stock gauges cant tell you actual temps...but they drop pretty low on the stockers at 70 cruising. They dont climb any where near "operating temp" on the stock ones with it pegged for a while either.

Taz

iTrader: (1)

On a 20 min stint, highest I saw was 205 F for the oil flowing out of the engine.
This is on an FD R1 with oem coolers with custom ducts ( and no reservoirs behind the coolers) running about 350whp on 2400lbs.
Cheers

wrankin

Sigh. I might as well jump in here.

NA FC w/ dual FC coolers plumbed in series. Lead cooler has custom ducting holes cut in front bumper. No thermostats. Stock engine. 150-160rwhp.

On a hot day at Rockingham (supposedly cresting 100F in the pits) I saw maybe 165F at the filter.

-b

Gene

iTrader: (1)

You track your RX with the stock gauges? That's bad mojo. If you do have a problem the stock temp gauge won't tell you anything is wrong until it's time to change the engine.

Jeezus

iTrader: (4)

I run a filter pedistal, with mechanical oil pressure, and electrical oil temp. My temp has gone to 180*F on Road Atlanta, with track temps at 120*F.

1982 RX7 12a, stock FMOC.

jkstill

iTrader: (11)

Just did a track day today, the first session I couldn't even get the car warm.

After the ambient temps warmed up to 70f, the coolant was 175 at the tstat, and oil was 175 at the filter, both while on track.

Cooling is custom vmount, dual Mocal 19 row coolers.

Single turbo, 350 rwhp.

Black91n/a

Ambient conditions have a HUGE impact on cooling though. Try that at altitude in 110 degree dry heat and you may have very different results. Not only would it have been cool, but it was probably reasonably humid, no?