Oil Coolers and Over cooling

NYBladeZ · 12-20-2011, 01:59 PM

I did not know that but it makes sense. However, no matter how you break it down, I need an oil cooler for spirited drives in NY but it definitely leads to overcooling in NY winters. Anyways in the Long Island area want to make an extra shroud for me

m4a1mustang · 12-20-2011, 02:01 PM

Quote:

Originally Posted by NYBladeZ

I did not know that but it makes sense. However, no matter how you break it down, I need an oil cooler for spirited drives in NY but it definitely leads to overcooling in NY winters. Anyways in the Long Island area want to make an extra shroud for me

You could do it in a few minutes. There's a DIY somewhere using some velcro and a sheet of aluminum (or plastic or anything else) that you could reach in and install/remove with ease.

NYBladeZ · 12-20-2011, 02:03 PM

Yeah I've seen the velcro DIY I'll have to get around to it, we're having a mild winter thus far in NY so I'll be driving the Z for a little longer than expected.

m4a1mustang · 12-20-2011, 02:04 PM

Quote:

Originally Posted by NYBladeZ

Yeah I've seen the velcro DIY I'll have to get around to it, we're having a mild winter thus far in NY so I'll be driving the Z for a little longer than expected.

I'm still waiting to put my winter tires on... it's been so warm lately.

ZForce · 12-21-2011, 01:23 AM

Hey guys, not sure if this will help, prior to the start of this thread I have read several other related oil cooler threads and combined several discussions into one post here: fall weather. the Z is staying at 190 degrees with,

I have re-posted it here. If its of no help and only boggles this discussion I will delete it. Let me know. Btw this is a great thread, subscribed.

Re-post:

Something to add to this thread (even if it's only for my own reference later when my memory has gone) since I have been reading through a lot forum threads lately on oil coolers, low oil temps, mocal thermostatic sandwich plates opening temp, the general oil temp we want to see coming OUT of the engine block, and block off plates. There a numbers of good threads on the topics. I have compiled the posts pertaining to the above mentioned topics and included the links to the threads for reference and further reading.

Here are some comments by Dustin from Z1 Motorsports who sells oil cooler kits.

Nissan Motorsports Oil Cooler vs. Stillen Oil Cooler

Quote:

Originally Posted by flashburn

........... here is what Dustin@Z1 had to say about it when I asked him about the 160-ish temperatures I was seeing:

Quote:

No worries. This is perfectly normal. There is a slight flaw in the VQ37VHR's design that we have discovered. Like I have mentioned in the past, over cooling the engine oil is just as detrimental as over heating it. The general oil temp range you want to see on a properly installed oil temp gauge is between 190 ~ 210 ideally.

This engine oil temp is what you want to see COMING OUT from the motor. In the case of the 370z and any add-on oil cooler, you are actually getting a false reading. Since the factory temp gauge reads engine oil as it exits the Oil Filter, you are actually reading the oil temp coming directly from the oil cooler. The flow pattern for engine oil on a 370z is as follows:

Pick Up Tube --> Oil Pump --> Oil Filter IN --> Oil Filter Out --> Oil Cooler --> Engine Block (Temp and Pressure gauges are located in this galley)

The temp you are reading is actually what is going back INTO the engine (which is perfect). By the time it cycles thru the engine, you can expect to see engine temps in 200 degree range.

As for the thermostatic sandwich plate, it will bypass roughly 80% of the oil back into the engine when too cold. It will still flow ~ 20% thru the oil cooler (preventing air pockets from forming).

To get a TRUE Oil Temp reading, you would need to install an inline oil temp gauge coming out from the Thermostatic Sandwich plate before the oil cooler.

Nissan Motorsports Oil Cooler vs. Stillen Oil Cooler

Quote:

Originally Posted by christian370z

How far off is the factory oil temperature gauge? Is it reading low by roughly 20 degrees then?

Quote:

Originally Posted by daisuke149

from what i understand, theres no set difference. depends on the ambient air and the size of the cooler/speeds etc.

Quote:

Originally Posted by flashburn

Yeah, that's my understanding as well, but 20 degrees might be a decent assumption. You can really tell in the case of "low temps", because if you have a thermostatic plate, you will see it get up to around 160-ish easily, and then usually stick around there unless you get stuck in traffic or are driving aggressively. Since it makes it up to around that temperature and sticks there, it seems like the thermostatic plate must be completely opened so it should be actually around 180 degrees. Or at least that's my logic behind it.

Maybe Dustin can chime in and give us a better idea. We really should make it a separate thread and sticky it.

Z1 Motorsports 370Z Oil Cooler Kit

Quote:

Originally Posted by Dustin@Z1

CRWallace,
I appreciate your input on this, but keep in mind. The factory temp sensor that displays on the dash board is post-cooler. You are reading the oil cooler at its coolest temp where the oil re-enters the block. The oil is MUCH hotter once it cycles thru the engine and returns back out to the core.

I do agree with you and we have suggested this in the past to many of our customers and forum members here on the370z. Owners of Z/G's living in cooler climates or in the winter with ANY oil cooler should consider blocking off the front of the core during the cooler times of the year. This method is used widely by racing teams to further regulate oil temps.

Race teams will block off individual rows of the oil coolers during test and tune to "fine tune" oil temps depending on the track conditions, humidity and driving style.

Quote:

Originally Posted by adampetrasek

Is there a thermostatic plate that opens around 200 or 210? That seams like it might make a bit of difference for the temps entering the block?

Quote:

Originally Posted by Dustin@Z1

Mocal does make a higher temp thermostat, but it is a remote mount style. This is a completely different setup when compared to the standard thermostatic sandwich plate that we currently use.

The current opening temp of the thermostatic sandwich plate we sell is 180* degrees F. This means, at 180* the bypass valve fully closes and directs 100% of the oil into the oil cooler core.

To build a custom Remote mount thermostatic sandwich plate with a higher temp. thermostat, it would increase the base kit price atelast $100 if not more. This is due to the fact that there would be double the total amount of fittings, 4 lines instead of 2, the requirement of a custom mounting bracket for the thermostat and a slight revision to the instruction manual.

I have had customer's express interest in the kit before, and would be willing develop it. We simply did not go this route due to to the added complexity and cost, which would have priced well out of the range of comparable kits. We wanted to make sure that we are competitive in every aspect....inlcuding price.

If you are a DIY type person, I can source the parts necessary to convert your existing -10 AN lines to accept the Remote Mount Thermostat. The catch will be the fact that you will need to cut your existing lines into two pieces, install new fittings and mount the thermostat. The sounds somewhat easy in writing, but assembling SS lines can be a pain in the neck!

Quote:

Originally Posted by ZForce

Does Z1 sell a core block off plate? If not then are there any photos floating around of a mock up block off plate on how to fab one?

Quote:

Originally Posted by John@Z1

We don't have one just yet but I'm sure there is a DIY somewhere on this forum.

Quote:

Originally Posted by ZForce

Here are a couple, pretty much the same with additional mods and more in detail on the second link.

DIY: Oil Cooler Cover

DIY: Oil Cooler Block Off Plate

.

Another good thread on the complete explanation on how the Mocal Thermostatic Sandwich Plate Operates:

Introducing the Z1 Motorsports 370Z Oil Cooler Kit *Customizable*

.

cdoxp800 · 12-21-2011, 03:26 PM

Well done ZForce. I was looking for that thread.

ZForce · 12-21-2011, 06:02 PM

Quote:

Originally Posted by cdoxp800

Well done ZForce. I was looking for that thread.

Glad it was helpful

Super Tanooki · 05-27-2012, 03:53 PM

I know I'm digging up an old thread but since, you know, "search the forum first..."

Thanks a lot ZForce and Dustin@Z1 for the info RE: post-OC temp readings. I used to feel a HUGE drop in power at about 225* (anyone else notice this?) before I got the OC. The OC install dropped my average temps LOADS so I thought the problem was over, but now I feel the power drop at around 205. It was baffling me for the longest time but that MUST mean the in-engine oil temps are basically about 20* hotter than the gauge says.

I just wish the car wouldn't pull so much power at 225*. I mean, it's terrible, even flooring it in first gear does near nothing until 4000rpm. :-/ Do you all get this lag at those temps?

Oh, on a side note, has anyone noticed turning on their AC ironically brings engine temps down about 10*? It's pretty consistent. I'm in Vegas, and I'd usually just bear the heat, but I actually HAVE to turn on AC just to kick in the fans to help cool my engine when it's lagging like hell.

Dustin@Z1 · 05-29-2012, 09:00 AM

Quote:

Originally Posted by Super Tanooki

I know I'm digging up an old thread but since, you know, "search the forum first..."

Thanks a lot ZForce and Dustin@Z1 for the info RE: post-OC temp readings. I used to feel a HUGE drop in power at about 225* (anyone else notice this?) before I got the OC. The OC install dropped my average temps LOADS....

No problem sir!

Quote:

Originally Posted by Super Tanooki

Oh, on a side note, has anyone noticed turning on their AC ironically brings engine temps down about 10*? It's pretty consistent. I'm in Vegas, and I'd usually just bear the heat, but I actually HAVE to turn on AC just to kick in the fans to help cool my engine when it's lagging like hell.

The drop in temp may be because the Aux fans kick may automatically kick on when the A/C is cycled on. I have honestly never paid any attenion to the 370Z and how this behaves. But I know most old school vehicles did this.

wstar · 05-30-2012, 02:04 PM

Quote:

Originally Posted by Dustin@Z1

No problem sir!

The drop in temp may be because the Aux fans kick may automatically kick on when the A/C is cycled on. I have honestly never paid any attenion to the 370Z and how this behaves. But I know most old school vehicles did this.

The behavior varies by vehicle design, but I too have definitely observed that a Z with normal ECU settings runs colder with the AC on. This seems counter-intuitive at first since the AC should be (a) adding engine load and (b) adding a little more heat back into the radiator via the condenser (the heat extracted from the hot air to make it blow cold). However, as noted by Dustin above, it's the fact that the ECU turns on the electric radiator fan(s) more often that makes up the difference and then some, due to increased airflow through the radiator (esp at lower speeds).

UpRev can now control this behavior: there are independent settings for AC-on vs AC-off which control fan duty cycle -vs- water temps. Aside from turning them on earlier in general, you can set the AC-on settings the same as AC-off and then you don't have to turn on the AC just to get the fans going.

Thread here: Fan Control now available!

SS_Firehawk · 05-29-2012, 10:01 AM

Quote:

Originally Posted by Super Tanooki

I know I'm digging up an old thread but since, you know, "search the forum first..."

Thanks a lot ZForce and Dustin@Z1 for the info RE: post-OC temp readings. I used to feel a HUGE drop in power at about 225* (anyone else notice this?) before I got the OC. The OC install dropped my average temps LOADS so I thought the problem was over, but now I feel the power drop at around 205. It was baffling me for the longest time but that MUST mean the in-engine oil temps are basically about 20* hotter than the gauge says.

I just wish the car wouldn't pull so much power at 225*. I mean, it's terrible, even flooring it in first gear does near nothing until 4000rpm. :-/ Do you all get this lag at those temps?

Oh, on a side note, has anyone noticed turning on their AC ironically brings engine temps down about 10*? It's pretty consistent. I'm in Vegas, and I'd usually just bear the heat, but I actually HAVE to turn on AC just to kick in the fans to help cool my engine when it's lagging like hell.

I would look at the IAT's that are coming in as well. Being in Vegas, the air is thinner, the pressure is lower, and it's much hotter. Did you notice it dropping power at 205 in the winter? I'm fairly certain the motor is pulling timing because it's sucking in air that's as hot as a hair dryer. An oil cooler does help maintain power, it's definitely not the cure all for maintaining it consistently through weather changes.

This is just an educated guess so please don't take this as word of God.

ZForce · 05-30-2012, 07:31 PM

Quote:

Originally Posted by Super Tanooki

I know I'm digging up an old thread but since, you know, "search the forum first..."

Thanks a lot ZForce and Dustin@Z1 for the info RE: post-OC temp readings. I used to feel a HUGE drop in power at about 225* (anyone else notice this?) before I got the OC. The OC install dropped my average temps LOADS so I thought the problem was over, but now I feel the power drop at around 205. It was baffling me for the longest time but that MUST mean the in-engine oil temps are basically about 20* hotter than the gauge says.

I just wish the car wouldn't pull so much power at 225*. I mean, it's terrible, even flooring it in first gear does near nothing until 4000rpm. :-/ Do you all get this lag at those temps?

Oh, on a side note, has anyone noticed turning on their AC ironically brings engine temps down about 10*? It's pretty consistent. I'm in Vegas, and I'd usually just bear the heat, but I actually HAVE to turn on AC just to kick in the fans to help cool my engine when it's lagging like hell.

I am not experiencing the lag your are experiencing at 225, then again I am located in a cooler region and we have not experienced yet this year any higher temps than 82 degrees. Looks like Dusting, SSFire and wstar covered the a /c fan.

_

DIGItonium · 05-30-2012, 09:30 AM

While we're on the topic of oil coolers, I have a stupid question. Are you guys using more than 5 quarts of oil? I might be 1 quart short (~ 10mm from H mark). I'm at 1,300 miles now since the last change.

ZForce · 05-30-2012, 07:44 PM

Quote:

Originally Posted by DIGItonium

While we're on the topic of oil coolers, I have a stupid question. Are you guys using more than 5 quarts of oil? I might be 1 quart short (~ 10mm from H mark). I'm at 1,300 miles now since the last change.

The 25 row oil cooler takes an additional quart when filling up the belly pan which puts it at 6-6 1/8 quarts.

If you are at 10 mm then its about a little bit above 1/3 quart oil consumption.

phohman · 05-31-2012, 11:40 AM

OK Same topic (maybe different stupid queston) Just picked up a 2012 nismo (production date 11/11) and there is NO oil cooler on the Veh. My quess is Nissan installed on later productions. Any one Know if this is the case?

12-20-2011, 01:59 PM	#1 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	I did not know that but it makes sense. However, no matter how you break it down, I need an oil cooler for spirited drives in NY but it definitely leads to overcooling in NY winters. Anyways in the Long Island area want to make an extra shroud for me __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

12-20-2011, 02:03 PM	#3 (permalink)
NYBladeZ A True Z Fanatic Join Date: Apr 2009 Location: New York Posts: 2,158 Drives: Lotus Exige S Rep Power: 21	Yeah I've seen the velcro DIY I'll have to get around to it, we're having a mild winter thus far in NY so I'll be driving the Z for a little longer than expected. __________________ 2009 Carbon Fiber/Red 370z aka Trish: Sports Package, Meisterschaft full catback, Fast Intentions Longtube Headers, Injen Long Tube Intakes, UpRev Tune: Sold 2008 Lotus Exige S Club Racer aka Bella, always leaves me smiling

12-21-2011, 03:26 PM	#6 (permalink)
cdoxp800 A True Z Fanatic Join Date: May 2009 Location: FL Posts: 1,337 Drives: 2011 Nismo Rep Power: 19	Well done ZForce. I was looking for that thread. __________________ 2011 Brilliant Silver NISMO 370z. #: 0046. PPE LTH \| MillSpec Cats \| F.I Exhaust \| Akuma Intakes \| Rotora 6/4 Brakes

05-30-2012, 09:30 AM	#13 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	While we're on the topic of oil coolers, I have a stupid question. Are you guys using more than 5 quarts of oil? I might be 1 quart short (~ 10mm from H mark). I'm at 1,300 miles now since the last change. __________________

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05-27-2012, 03:53 PM	#8 (permalink)
Super Tanooki Base Member Join Date: Jul 2010 Location: Las Vegas Posts: 217 Drives: 370Z MT Base/Spt Red Rep Power: 15	I know I'm digging up an old thread but since, you know, "search the forum first..." Thanks a lot ZForce and Dustin@Z1 for the info RE: post-OC temp readings. I used to feel a HUGE drop in power at about 225* (anyone else notice this?) before I got the OC. The OC install dropped my average temps LOADS so I thought the problem was over, but now I feel the power drop at around 205. It was baffling me for the longest time but that MUST mean the in-engine oil temps are basically about 20* hotter than the gauge says. I just wish the car wouldn't pull so much power at 225. I mean, it's terrible, even flooring it in first gear does near nothing until 4000rpm. :-/ Do you all get this lag at those temps? Oh, on a side note, has anyone noticed turning on their AC ironically brings engine temps down about 10? It's pretty consistent. I'm in Vegas, and I'd usually just bear the heat, but I actually HAVE to turn on AC just to kick in the fans to help cool my engine when it's lagging like hell.

05-31-2012, 11:40 AM	#15 (permalink)
phohman Base Member Join Date: Feb 2011 Location: Katy-Houston Tx. Age: 62 Posts: 124 Drives: 2012 370Z Nismo Rep Power: 15	OK Same topic (maybe different stupid queston) Just picked up a 2012 nismo (production date 11/11) and there is NO oil cooler on the Veh. My quess is Nissan installed on later productions. Any one Know if this is the case?