Oil Cooler Questions

[DDozier]

OK I have done a little checking and have seen the options from Dali and Comptech, but what I was wondering is the NSX has a oil cooler built in what happens if you bypass the engine coolant and route new lines to a new smaller radiator add a small water pump, and used a seperate coolant source for the oil cooler. You would not be using the heated engine coolant to try and pull heat out of the oil, Honda did this to allow for the oil and water temps to raise together quicker, heating the oil on cold days with the coolant from the engine then reducing heat in the oil should it go above the 210 degree engine coolant temps, but if the two were seperate than the oil would only be exposed to what should be a much cooler source of coolant. I just do not know how effective the OEM cooler is or how big of a radiator you would need to add to draw enough heat out, I guess a thermo sensor could be used to turn on the water pump only after the motor reached normal operating temps. I know the AEM could control the pump based on engine temps. So am I missing something here or is this just seem like too simple of a solution to the oil temp problem. I was hoping someone had explored this option and has some insite, if this is workable, this would be a low cost option for oil coolers and most impotantly would not increase any stress on the oil system by adding extended oil lines.

Dave

 

[titaniumdave]

Dave,
I am working on a plate that will replace the oil filter bracket/oil cooler thing all together. I am planning on using a oil to water cooler plugged into the radiator feed hose:

http://www.hrpworld.com/index.cfm?form_prod_id=116,274,51,363_1106&action=product

and relocate the oil filter to somewhere a bit less messy. I am going to plumb in an Accusump at the same time too.

It seems like the engine coolant has the capacity to deal with the heat of the oil with out a need for another system. If my car has overheating problems, a bigger fan will be my first solution, then a larger radiator if need be. I really want to do just enough, not over kill(like I usually do:redface: ).

 

[DDozier]

I agree on just enough but if others are overheating using the OEM Radiator, maybe with adding the second coolant source both cooling systems would benifit, The engine coolant would not have to absorb the oil heat and the oil would not have the heat of the engine coolant adding to its heat. For us FI guys and your setup is almost the same as mine, I know we should do something, I just want it to be clean and simple. I still do not like the idea of extending oil lines, and the possible pressure loss that could result. I need to add a oil temp probe and log some time on the road.

Did you heat wrap your headers or the oil pan?
Do you know what the coolant temps are after the OEM radiator?

Did you see the ARC piece on Dali's website:
http://www.daliracing.com/v666-5/catalog/index_browse_part.cfm?focus=1134

Dave

 

[titaniumdave]

The only thing I have done is a BIG vent in the hood, Dali Banana Boat hood. I can run all day at Thunderhill in 100 degree weather and the temperature never rises above the middle of the gauge! Nothing wrapped, only mod is 20-25% antifreeze with water wetter. About half of the Honda spec for anti freeze, but it never drops below 0 here.

Before the vented hood, temps were an issue...

My goal is to have better oil control, temps lower, back up Accusump to prevent oil starvation. I think all these external things make it so the only internal mod will be a high output, billet oil pump gear set. Leave the pan alone until I dry sump it

I do have a bigger fan I am going to install, pointed up toward the hood vent, and build a deflector to direct all of the air up and out of the hood.

 

[Hrant]

I like your thinking Dave ...... keep us posted. And as you noted, the testing ground is here at THill :wink:

 

[SMGNSX]

Dave,
I am working on a plate that will replace the oil filter bracket/oil cooler thing all together. I am planning on using a oil to water cooler plugged into the radiator feed hose:

http://www.hrpworld.com/index.cfm?form_prod_id=116,274,51,363_1106&action=product

and relocate the oil filter to somewhere a bit less messy. I am going to plumb in an Accusump at the same time too.

It seems like the engine coolant has the capacity to deal with the heat of the oil with out a need for another system. If my car has overheating problems, a bigger fan will be my first solution, then a larger radiator if need be. I really want to do just enough, not over kill(like I usually do:redface: ).

Dave,
I was advised not to use this as it is like what you are doing http://www.bakerprecision.com/setrab1.htm the LOC- 100 it will heat the water to the temp of the oil, The answer a oil cooler in the vent and a larger crossflow radiator and 100% water wetter
Steve

 

[greenberet]

Dali told me that the ARC oil/water oil cooler listed on their site as "not priced yet":

1. isn't being priced because it doesn't remove enough heat from the oil to work
2. if it were priced, it would cost over $1000

Dave, if your setup has the capacity to keep the oil from getting too hot, it would be great!

 

[CK_SB]

Here are a couple of pics. of my diff. cooler in the left quarter panel vent. This couild easily be done on the right side of the car for the engine oil. The one way check valve prevents oil bleed back when the car is turned off and keeps the cooler fully primed. I would add an oil thermostat to your system so the system does not operate until needed. My actual engine oil cooler is trunk mounted along with the accusump and has air vented into the trunk with NACA vents. This would not be recommended for a street vehicle but it works great. I will post pics of this if anyone wants to see the system.

Best regards,

Chris

 

[len3.8]

Dave, let me know if you need a cooler.
I have one with some Earl's lines, that I can let you use if you need to mock up somethings.

Len

 

[01blacks4]

my oil cooler option...uses a custom raditor and some line...thats all, relocated a second filter. this with a DALI big oil pan and i have alot more oil in the system that before, pressure didnt seem to drop at all, which some said it would.

 

[len3.8]

my oil cooler option...uses a custom raditor and some line...thats all, relocated a second filter. this with a DALI big oil pan and i have alot more oil in the system that before, pressure didnt seem to drop at all, which some said it would.

Looks good Marc.. A lot like Porsche's older oil cooling solutions for the earlier cars.. With the aditional filter?
Or did you relocate the regular filter to the front?
How much oil is needed to fill your pan now?
Also, most of those cars were fine on the street but they still could have used a dry sump when on the track.
If you don't track the car a lot, I can't see a problem.
I see that it is looped through the radiator, that should be pretty cool temp wise.
Are you worried about the system not letting the oil get up to needed operating temps?

Looking good.
Len

 

[DDozier]

Dave, let me know if you need a cooler.
I have one with some Earl's lines, that I can let you use if you need to mock up somethings.

Len

Thanks len the parts list is complete I will take you up on that and order all other pieces to set up a bench test, right now I am just reading some oil temps while on the road. A little to cold to BBQ so here is my test euipment.