olddragger

iTrader: (3)

Well I have heard a lot about this and to me there seems to be some logic to it. I am wondering if anyone has yet applied any fans to their oil coolers and if you are noticing any results. tell us about it.
olddragger

Razz1

You mean using a fan from a PC for a mother board processor?

olddragger

iTrader: (3)

No there are actually some aftermarket small size fans available that are bigger than the ones for a pc. I would think you would need to move more air than that.
olddragger

army_rx8

hmm....i wonder how well that would work...i'm sure there is someone out there tha't sdone this i just hoe they see this thread

Argento Otto

Fans would be a good idea, but only when the car is idling. I think at speed, more air moves across the fins than what a fan can produce, no?

army_rx8

^hmm that's true

MadDog

I am not doing fans. I'm doing a third oil cooler. The stock coolers are in series, so i'm putting another one inbetween.

jeffe19007

Where would you put a third cooler? I just read an old Rx-Tuner article about putting in a larger radiator, and they mentioned that the space around the stock radiator was pretty tight (I have not been in there myself).

Are you considering large stacked plate cooler? Perhaps where an intercooler might normally go?

In following up the idea of fans, it seems that you would need a 6" or 7" fan for the existing oil coolers (looking at my RB screens). I don't think there is room in front for them, has anyone peeked behind to see if there is room?

There are thermostatic wiring kits to set these up if there is room. I still need to do some research on flow, how much is needed, and how much those fans might get in the way.

That leads me back to temp gauages, both oil and water... I guess I will start there first. I like the way Robin Yang solved that problem.

Sorry, I am just dumping my thoughts out there and maybe I can get some feedback that can clarify a direction.

I am very interested in getting some additional cooling reserve or headroom in this car. It gets pretty hot in Phoenix and my future plans for this car may involve more horsepower. From what I have read, previous rotaries had heat issues, and that was a major problem. Getting some margin of safety in cooling is a good idea.

JOHNRX8

Actually, it would be real easy to control the fans, just tap into the radiator cooling fan wires to trigger a relay, which would send power to the oil fans. This way, they would only be on when the car "Needed" them. Also you would need a fan that 'Free Spools" quite easy, so air can still flow when they are not in use.(high speed travel).

olddragger

iTrader: (3)

Yea
Now yall are talking. And I dont think fans will be needed at speed. it is only during that stop and go stuff with the a/c on that the fans really need to kick in. Heck when I am on the track the coooling fans never come on even after I pit. Its that slow time that cooks us. 3nd cooler would work also.
olddragger

MadDog

I found an oil cooler that measures 28"x3.5"x3.5". I found where to tap into the existing oil cooler lines. I just haven't decided on which of two places to mount it. 1) at the base of the radiator. 2) where the GReddy intercooler goes. There is a large volume in front of the radiator to work with. Those dimensions are pretty close to ideal. Not to mention, its a VERY efficient cooler. I plan on a DYI after I finish.


-MD

Lock & Load

Great , but coming from a mad dog that thinks its a rooster is a bit of a concern j/k :D


B...free
michael

jeffe19007

What are the chances of putting a cooler drain in there while you add the 3rd cooler... need to find or create a low point in the system...

And what effect would that have on the initial startup after the oil change?

It would be great to drain the system completly.

MadDog

Ha ha! Well, it is MAD after all! :D

As for the drain, the existing oil coolers have there hoses at the bottom of the cooler. Since I plan to tap these hoses, I don't see why you couldn't make a drain if you wanted. It would be the low point. Maybe you could run a separate drain line so that you wouldn't have to remove the splash guard every time you wanted to change the oil.

dannobre

iTrader: (3)

me too just making brackets right now!

dannobre

iTrader: (3)

I didn't want the current draw of aftermarket fans...if you mount the cooler in front of the rad...it will be cooled by airflow when the radiator fan comes on....no extra fans needed

MadDog

I had the same thought about the flow through the rad. It will be hotter air, but that's still better than nothing. That air is still going to be cooler than the oil, so it will still transfer heat from the oil to the air. Which cooler did you get? I have the Fluidyne Therm-HX 30816.

dannobre

iTrader: (3)

91 RX-7 oil cooler...comes with a built in thermostatically controlled bypass valve. Nice Alum unit..

mikeschaefer

There exist aftermarket oil coolers for the 8 that are larger and cool the oil more efficiently. check www.japanparts.com

I definitely wouldn't add a 3rd oil cooler. The A/C condenser already blocks air to the radiator as it is. Plus if ANYthing goes up there it will be an intercooler :p


edit: n/m about that larger oil cooler.. i dunno what i was thinking


But after further examination of that site it seems as though japanese 8s only came with ONE oil cooler?? So does that mean our 8s are already running better than avg oil cooling? /shrug

Razz1

Why not just get a vented hood?

I think that would be best.

dannobre

iTrader: (3)

Vented hood won't do much for oil cooling. It will drop underhood temps a bit though...

max5roadster

Enlarging the vents in the fenderwell is an option, too. Seen a few 300z's with this.

mikeschaefer

I am actually considering removing my foglights. I know they only BARELY block flow to the oil coolers but: 1) I never use them anyway because they look stupid compared to the headlights and 2) They'll be gone if/when I ever install the Mazdaspeed body kit.

StealthFox

i sugguest getting some high flow oil coolers, but i dont know if any of the companies make kits, i was thinking of setting up some Blitz coolers.

rigging up a fan system seems pretty complicated too...