[Big Dave]

Hi folks.

Im looking at putting a second oil cooler on my car.

As im finding its getting hot + the oil pressure is dropping, as the viscosity is reducing with the extra heat...



The engine is BRAND new ,, freshly rebuilt , so its not a problem with that,,

As on normal temp days its OK ,, its just hot days that causing the problem...



OH , the car is mainly used on track days....So it gets used quite hard...



Have any of you "racer / endurance" chaps , done such a mod,, and how / what kit have you used...

Ta.

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[Eric_K]

I run the stock cooler on my race car and I haven't had any issues. I think Pete at RSBarn was working on a setup with a second cooler.

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[flash]

funny you should mention that - i was just thinking about jumping back into that project, as i am about to fit the new splitter and am going to be working on underbody ducting - this was a perfect time to address this



both pete and i have been trying to sort this one out for a while now - the fittings are problematic, at least in any cost effective form - we've been scratching our heads and looking into this and that, but so far, nothing simple - maybe a new idea will pop to mind this week



how fresh is the motor? - new motors run hotter for the first couple thousand miles, until everything breaks in

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[Big Dave]

The engine has done approx 5-6000miles ...

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[flash]

hmmm should be broken in and not having those issues



i'm wondering if they did the oil pump while in there - if not, then when warm, it would lose pressure

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[orphanowner]

[quote name='Big Dave' post='29866' date='Jan 13 2007, 08:48 AM']Hi folks.

Im looking at putting a second oil cooler on my car.

As im finding its getting hot + the oil pressure is dropping, as the viscosity is reducing with the extra heat...[/quote]



How hot is hot? Do you have an oil temp gauge? I've found on the track the oil temps are acceptable with the stock cooler. 220-230 is fine with synthetic oil. I'm talking 105 ambient temps and no issues.

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[333pg333]

Dave it's my understanding from many who race that you should upgrade your stock oil cooler. The position is ok where it is, just go larger and with a decent core. There is a post on R-list a.t.m. by user 'Guns951' about his 'Gulf' car, and he has bought a larger radiator that has an incorporated oil cooler utilising water cooling as well as air. Looks interesting. It's an old race system. Increasing your oil cooling is always a good idea for a track car.

Patrick

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[Darth Vadar]

Another thing to check is the air flow thru your existing cooler! After some 50K+ miles, I pulled my bumper cover off to replace the plastic mesh, and checked out my oil cooler... it was 80% plugged with road grit and debris! I carefully soaked it down with citrus based cleaner, and blew out the crud from the rear with an air hose, and it cleaned up beautifully! I suspect that the position allows for excellent airflow, but that means every bug, gain of sand, leaf bits, etc. get drawn directly to the opening... just an idea!

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[333pg333]

Yes good point Darth. I imagine you know this through similar issues with the front of your mask. lol.

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[Big Dave]

Pat

This is actually going to be fitted to my S2.

But as 968,s are almost the same layout, i thought ide ask over hear..

I was contemplating fitting a pair of 944Turbo oil coolers , locating them in a mirror position either side of the water rad...using the turbo mounting points , with the turbo ducting....If you get my drift....



I then saw a 928S4 cooler + thought that might do...??? BUT in from of the rad...lower down...



Its a bit of a project [winter]... So im just after some suggestions...



Darth

Ive already cleaned out the original cooler to no effect...But thanks anyway...

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[Peter Empson]

Hi Dave,

I have the same problem, although admittedly I don't have as much air flow to the oil cooler as on a normal S2 due to the small cut out on my front bumper. I'm adding an oil temperature gauge soon (my garage have put a sender in a sump plug for me), so at the next oil change I'll get it fitted to see exactly how bad it is. I can't decide whether to add a second cooler or just go for a larger version, but ultimately I suppose this will depend on how much space I can find for it.

Best regards,

Peter.

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[333pg333]

Well I was speaking to a guy who prepares Porsches and other cars for racing and I may re-evaluate. This is based on one factor, mainly that at the moment we only compete in short SuperSprint events over 4-6 laps. This guy suggested that under these conditions that it is unlikely that we even get up to decent running temp (100-110 degrees) and so having a larger oil cooler could even be counter productive. In face he said that he would even consider taping up our stock ones on track days so as to keep a bit of temp in the car! Well after getting over the slight shock, the first thing that occurred to me was to get a proper oil temp gauge. It's patently clear that not to have one on a trackday car is crazy. You can't rely on the stock pressure gauge alone. I'm sure I'm stating the obvious to many of you here, but it's a steep learning curve as you all know and many of us are just on different rungs of the ladder. Any thoughts on costs or brands of oil gauges? Anything to be aware of here?

So the moral to this post is it's dependant on what sort of events you are doing as to the cooling systems needed. <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" />

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[Jason Judd]

I replace my stock oil cooler with a Mocal oil cooler...



It sits in front of, and extends the entire length, of the radiator...but is only about 4~6" tall.



I have the added benefit of an add'l 1 quart of capacity now, too.



My car is used primarily on the track...and since we did the turbo conversion, I've come to like the added cooling as a safety feature, since the oil is also used to cool the turbo.



Jason

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[Peter Empson]

[quote name='333pg333' post='30024' date='Jan 19 2007, 10:23 AM']Any thoughts on costs or brands of oil gauges? Anything to be aware of here?[/quote]



I can't recommend it yet, but I went for a VDO gauge for the simple reason that it was the one that looked the closest to the rest of the interior. It came with the sendor and cost something like £50-60 here in the UK. Given their reputation I'm expecting good things of it once its fitted. <img src="/forum/images/smilies/968/smile.gif" class="smilie" alt="" />

Best regards,

Peter

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[RS Barn]

Funny this topic should come up!

I have stock hoses and oil filter housing in my truck to go to machinest. Bob and I have discussed ten different ways to approach this. We keep going in circles. I am in the process of rebuilding and adding power to a 968 Firehawk car. It is imperitive to add oil cooling. We saw 260 degrees at Watkins Glen this summer in 95F temps. No blinkin good. I'm going to see if I can get a plate made with male fittings to open up all the options of larger single cooler or dual coolers.

I will have this resolved in next 6-8 weeks and have a kit!

Pete

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[Darth Vadar]

Yes good point Darth. I imagine you know this through similar issues with the front of your mask. lol.





He, He!!! Yes, and those Nasal Strips just don't do it for me!!! <img src="/forum/images/smilies/968/tongue.gif" class="smilie" alt="" />

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[333pg333]

Well I think I'm going for the best of both worlds. I'm going to get an element in my dry sump system and add the oil cooler. Has to be better than stock anyway.

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