Sharif@Forged

iTrader: (92)

For those that have an oil temp gauge, I am curious as to the types of oil temps you are seeing during aggresive track driving. Please state whether you are forced induction or normally aspirated, and what type of oil/cooling mods you have. Just trying to get an idea of what normal temps you guys are seeing.

SinCity350Z

iTrader: (19)

Running a built motor JWT TT (530bb), JWT Oil Pan Spacer, and Stillen Oil Cooler in a crappy location behind the intercooler. Temps get into the 260 range when charging hard .

Resolute

iTrader: (2)

I would be curious to see the survey of oil temps as well, especially with the TT crowd.
Will

knight_white99

iTrader: (5)

I've seen 270 to 280F, also while running JWT TT (530BB), JWT oil pan spacer, PWR oil cooler...

No vented hood yet - hope to change that for the next Time Attack.

amolaver

iTrader: (1)

APS ST and a big-a$$ oil cooler up front. I can't keep my water temps down enough yet to know what sustained oil temps will be, but 240 was about what I was seeing when my OEM water temp gauge started to move from its 'normal' spot (which seems to be about 215 degrees). Once the OEM water gauge started moving, I backed off.

Hoping to remedy the water situation soon.

ahm

Jay'Z

iTrader: (118)

I dont have a oil temp gauge.. just water temp.. my temp hits about 220+ hitting hard at the track! About 10 passes ***** to the wall!

kwiker

iTrader: (17)

Where do you put the sensor for measuring temp also?

sentry65

iTrader: (11)

you guys should post how long the session you drive is and what the ballpark ambient outside temp is

racin

iTrader: (1)

Twin oil coolers mounted in a C-West N1 nose, along with a large radiator, vented hood, using the Power Enterprise TT setup, modified I/C mounting location for cooling during racing sessions: Oil, 215/220 in the summer in FL, water around 205/210. Took a lot of work to achieve those temps, by the way...

MoodDude

APSTT w/ 36mm Koyo and Setrab oil cooler.
I really don't have any problem with my oil temps. The hottest I have ever seen was 109C, most of the time it is pretty steady around 95C after I install the oil cooler correctly. My problem lies in the water temps, especially at Sebring.

Nick - what did you do to solve your water temp problems?

Sharif@Forged

iTrader: (92)

Great feedback...keep it coming.

Does anyone have any back to back experience with the vented hoods? Did simply adding a vented hood result in meaningfully lower oil temps?

betamotorsports

iTrader: (1)

I can't speak directly to a 350Z application, but I did do a track test for customer that monitored underhood temps in a 2000 Ford Contour SVT. Basically, once the car was traveling over 15 mph, the underhood temps statyed within 5 degrees of ambient air temps.

Adding a front vented hood (top vent for the radiator) actually increased temps in the rear of the engine compartment by 25 to 85 degrees above ambient, depending on how fast the car was traveling (faster is cooler). Adding a rear vented hood (cowl induction style - postive pressure) really increased overall underhood temps up to 125 degrees above ambient.

This was a NA application.

EDIT: Didn't answer the question - all of the above changes had no significant affect on engine oil temps. The rear vented hood increased coolant temps by about 25 degrees, otherwise there was no significant coolant temps changes. The test was conducted at WSIR on pretty cold day.

Chebosto

iTrader: (43)

hey Sharif-
ever since adding my Asuka hood, i've noticed that my water temps cooled down faster, but not significantly lower, oil temps have only minimally decreased but that might just be due to ambient temp variations.. what might be interesting to do is check air inlet temperatures on an NA car with vents near the rear of the car for plenum cooling..

Sharif@Forged

iTrader: (92)

Well, the main reason I stared this thread, is because have an NA track-only customer that is seeing 280F temps, regardless of ambient conditions. Same temps at 40F vs. 85F. His coolant temps are rock solid at 210F or about 99-100C.

He is currently running the Setrab oil cooler, Motul 15w150 300v engine oil, and a spacer. He drives his car harder and faster than anyone I have seen. This guy is an animal on the track, so I think its higher temps might be indicative of how car he pushes the car.

We'll see.

350zippy

great thread for guys tracking Z's. thanks Sharif for posing this questions.
i would like to expand with more questions:
is it acceptable(or safe) to run oil temps @280f( since some other race cars run temps lower than that~200-220f)?even with motul 300v?
would a slightly larger oil cooler ( may be setrab slightly taller ~10") lower temps, and how much? would a set up like Eagle1( amsoil bmk13) also help?
if " RACIN" could expand on how his dual oil coolers were set up.
thanks.

MoodDude

"Every transfer of heat between two fluids in a Heat Exhanger (HX) is directly proportional to the mean temperature difference between the two fluids, to the area of interface between the two fluids and to the volume of the cooling fluid flow." Carroll Smith, Tune to Win

It is much better to run 2 smaller oil coolers in Parellel than one larger one. The answer stems from the fact that HX can disappate more heat the larger the temperature difference between the fluid and the air moving accross it (as we are talking an oil to air HX).

Now, your ideal oil temp is around 85C, and it is better to be slightly warmer than this than colder!

You also need to install HX so that their is no trapped air in the system. This usually means that your oil in is at the bottom and your oil out is at the top. You can do this with the Setrab by simply turning it sideways (as I did mine).

Also, you want to design your air side with fresh cool air that is laminar in flow (use a diffuser), high velocity and uniform accross the entire HX. The air also needs a reduced pressure discharge point.

350zippy

moodDude, thanks for reply.
i think it will be difficult to put 2 coolers in front of the radiator.
also , since the oil system is pressurized would it make any difference how you install the oil cooler?( like recommended or sideways).
also, seems to me that will be near impossible to run @ 185F(85c) on the track.
tia

betamotorsports

iTrader: (1)

280F is not bad for oil temps under racing conditions if a synthetic oil is used and the temp sensor is on the inlet side of the HX. If that is the temp of the oil coming out of the HX, then that engine is going to have problems. Adding an oil/water HX after the oil/air HX is another way of stabilizing oil and coolant temps. Just upgrade the feed and return lines one dash number (go to -12 from -10 or from -8 to -10) if another HX is plumbed in-line.

MoodDude

You would be suprised how much air gets trapped in the system if you don't follow the simple rule of ensuring the discharge is at the top of the HX.

Don't put the oil cooler in front of the Coolant HX! You will reduce your flow through each HX, and hot air will be going into the coolant HX.
Find a different location and not behind the Coolant HX either. You can simply duct some cold air from the front of the car to the oil HX.

Since I installed my oil cooler correctly I see 90C most of the time and 95C max and this is with 440rwhp and TT set up.

350zippy

john, oil temp sensor at the oil pan through the jwt spacer.
mooddude, oil cooler is located as suggested by stillen (side to side with PS cooler ) .
tia