I have searched and searched and I can not find something that I have seen. There is a product tha replaces the oil cooler thermostat and allows the oil to pass through the oil cooler constantly. It screws into the oil filter housing. Can anyone tell me what it is called and where to get it? I think it is about $67.00. I want to use it for very hot track days.

 

no, it's a lower temp thermo. at least by comparing it to the stock unit, thats what it seems. Don't know what temp it opens, but my oil temps on normal driving is around 70C.

http://www.z1auto.com/prodmore.asp?m...ne&prodid=1169

Screws in by there, it's where the oil cooler lines connect to the block.

 

I don't see why you would want to do this. You need to get the oil to a certain temperature to burn off moisture and it could have an effect on detonation and engine performance as well. Think of it like you wouldn't start hammering on your car when it's cold, so why would you want to keep it cold?

Ideally, you want the oil temp to stabilize at around 80C under hard use.

 

because if i remember right, stock it doesn't open til 90C. Any extra circulating and cooling "on track" is going to help, where temps are normally in the 115-120C range, or more.

Definatly wouldn't do it in the northern climate, but down south here, it's definatly a plus.

Oil is plenty fluid at 70C man, it's not like it's 35F degrees outside or nothing man

edit: z1's page says 85 C, but i thought i remembered it being 90.

 

The reason I want it is simple. When doing track events the oil in my car will hit 270 degrees in 5-6 laps of a 2 mile track. That means that the oil is getting too hot!. A lower temperature thermostat or a thermostat bypass will slow this radical rise in oil temperature and hopefully allow me to continue at speed until the end of the session instead of now having to throw in cool down laps in the middle of a session.

This mod is by no means a a recommended street mod. It is only for track days. I would remove the device as soon as possible after the track day. Plan B is to put a fan on the oil cooler to improve air flow. Plan C is to get a bigger/better oil cooler. I am looking into the quick and cheap fix first

 

you're gonna have to change the oil after and before every day then, pretty much.

I've run it for oh 6 months or so, no foul effects, again it doesn't get that cold down here, i'd imagine you'd be good for a late spring/all summer/ into fall.

A fan would only slow it down when moving, unless the fan is pushing out air, faster than you're moving (not likely). A bigger one sounds good, and i've often pondered it also, but around here, i seem to get the oil up to 125C (260 or so, and thats about the peak)

If the oil is cooler to start, it'll take a little longer to heat up, but sounds like you're just running a bit hotter than i am.

 

I searched your posts, and see gingerman is one of your main tracks, i may have even met you up there with a couple guys. (before i was modded, etc, ran 2 days up there basically stock, fun track).

Just got your pm, the place i got it, i listed in the 2nd post

I believe most of us were getting in the 120-125C range, i'll have to ask Tim (05 grey MR) what his temps were, as he runs a lot with CGI, but i'd venture to say they're the same.

If you go the upgraded cooler route, let us know, because i'm also considering it. Only kicker is it pre-heats the tires, and my right front, on a clockwise course, gains 1 to 1.5 psi on a hot session, due to the cooling air being pre-heated

 

Lancershop has it it's called Tomei EVO Oil Thermostat Eliminator Part #193040 $64.95

 

same thing.

http://lancershop.com/customer/produ...8&cat=0&page=1

just $20 cheaper, and out of stock at lancershop.

 

good thread!

I will be ordering one shortly

 

I have this on my '05 RS. I can only tell you what my stock Mitsu oil temp gauge tells me. Before I installed it I would see temps constantly in the 85-90C range. After I installed it I see constant temps no higher than 65-70C, and this was last summer in 95F Texas heat. The oil temp averages about 40C higher than ambient outside temp. I think that speaks for itself whether or not this piece works. I installed it at the same time I changed the factory break-in oil at 500 miles. It was extremely easy. The stock oil temp sensor is located above the oil filter. It takes a pretty big wrench though to install the Tomei piece. I had to go to Autozone and buy a 1 1/8" (I think) wrench to install it. I think the stock oil temp sensor was a 19-21 mm wrench which I already had. The stock oil temp sensor is located above the oil filter, and very easy to spot since it looks very similar to the Tomei piece. I didnt get any instructions with it, so if anyone has any other questions, just ask.

 

Explain to me how this really reduces temps? Once the thing is open and the oil is heat soaked, the cooler can only remove so much heat. The steady state condition should be the same regardless of when it opened. It will just take longer to reach steady state from a cold start.

 

yes, but when you're out for the first few laps, you're at lower temps.

It won't help long runs, but it will for the normally short 15-20 min sessions.

Also, when you come in, and let the car idle down, the car continues cooling the oil, rather than leaving it at 85-90 C. You're starting your run with at least 15 C colder old, (30F). and when you're cycling the oil through the cooler, it maintains longer. When the oil is already 90, now it's trying to cycle it out there and cool it off, whereas you could have been cooling it previously.

 

I see....

I think this is a bandaid solutoin compared to an oil cooler upgrade, but if it helps for a few laps, it's better than nothing I guess...

 

not for me, as living in florida, it's always helpful to have oil at 70, rather than 90.

But for the track temp issue, it's not a 100% fix-all, by all means.