Double oil cooler

[kcam86]

So today I had a chance to goof in a carrera s and it twas fun but I noticed it had two oilcoolers. My question is "is it overkill to have two on our car". I figure the porsche engineers know quite a bit more than me and i was wondering if they did it just to do it or is it something that would translate to something beneficial for us. Ty in advance.

[mav1178]

What is your end goal? Why do you need an oil cooler? What temps are you trying to maintain?

Answer the questions first. Don't assume that more is better, especially coming from another car that is of zero relevance to ours.

-alex

[kcam86]

Originally Posted by mav1178

What is your end goal? Why do you need an oil cooler? What temps are you trying to maintain?

Answer the questions first. Don't assume that more is better, especially coming from another car that is of zero relevance to ours.

-alex

My end game goal is to have a streetable car that is competitive with in reason on the track. From my understanding 220 or less is a good temp and I want to be able to maintain that while hot lapping. Im also going fi this weekwnd with a greddy kit. Ty again

[stugray]

Originally Posted by kcam86

So today I had a chance to goof in a carrera s and it twas fun but I noticed it had two oilcoolers. My question is "is it overkill to have two on our car". I figure the porsche engineers know quite a bit more than me and i was wondering if they did it just to do it or is it something that would translate to something beneficial for us. Ty in advance.

If it was an older aircooled engine, then oil cooling is vitally important.
SO the old-school porsche guys will and an external oil cooler to supplement the stock oil cooler.

My track Porsche has three oil coolers (the stock one and two external coolers mounted in the foglamp buckets.)

[sw20kosh]

Easier to just size the oil cooler properly.

A 13 row series 6 setrab is too small for FI.

@CSG David says the 15 row series 9 setrab is working well on the JR supercharger on track but they have played around with the possibility of the 20 row series 9 setrab (less pressure drop than the 15 row) to get temps down further from 245-250.

I think I am going to swap my 13 row series 6 for a 20 row series 9 on my turbocharged setup. No need for the complexity of a dual cooler set up.

I think you might run into pressure drop issues with a dual cooler set up too?

[sw20kosh]

Originally Posted by stugray

If it was an older aircooled engine, then oil cooling is vitally important.
SO the old-school porsche guys will and an external oil cooler to supplement the stock oil cooler.

My track Porsche has three oil coolers (the stock one and two external coolers mounted in the foglamp buckets.)

I assume you have measured the pressure drop from doing that? Not a concern?

[CSG David]

Originally Posted by sw20kosh

Easier to just size the oil cooler properly.

A 13 row series 6 setrab is too small for FI.

@CSG David says the 15 row series 9 setrab is working well on the JR supercharger on track but they have played around with the possibility of the 20 row series 9 setrab (less pressure drop than the 15 row) to get temps down further from 245-250.

I think I am going to swap my 13 row series 6 for a 20 row series 9 on my turbocharged setup. No need for the complexity of a dual cooler set up.

I think you might run into pressure drop issues with a dual cooler set up too?

If you go with that one (basically the largest OTS oil cooler from Setrab), I hope you have the proper fans to pull that air through the vents. The forced convection with also aid in cooling as well. A vented hood doesn't hurt either.

[stugray]

Originally Posted by sw20kosh

I assume you have measured the pressure drop from doing that? Not a concern?

It was a concern. That is why I have 30 feet of 12AN (3/4") stainless hose.

And the overall pressure is higher since the oil never gets too hot.

[sw20kosh]

Originally Posted by stugray

That is why I have 30 feet

Can you explain this more? I don't get how 30 feet of hose is good for pressure?

[CSG Mike]

Originally Posted by kcam86

My end game goal is to have a streetable car that is competitive with in reason on the track. From my understanding 220 or less is a good temp and I want to be able to maintain that while hot lapping. Im also going fi this weekwnd with a greddy kit. Ty again

Where would you place that oil cooler(s) with the Greddy kit?

Keep in mind, how large was the opening on the Porsche to the oil coolers, and how large an opening do you have on the FRS? (This is why I facepalm at a lot of "custom" oil cooler setups).

[sw20kosh]

Originally Posted by CSG Mike

Where would you place that oil cooler(s) with the Greddy kit?

Keep in mind, how large was the opening on the Porsche to the oil coolers, and how large an opening do you have on the FRS? (This is why I facepalm at a lot of "custom" oil cooler setups).

Does an oil cooler mounted behind the fog light/turn signal bezel (with a cut-out in the wheel well liner to let air flow out) make you face palm?

[Element Tuning]

So I have a pretty detailed thread about oil pressure in the engine forum but I think you should do a before, after, and then after pressure test. What I'm saying is measure you pressure at the "mains" oil galley with no cooler, add a cooler and note the pressure and the temperature. If you are too hot and or your pressure is still too low I would then consider adding another cooler. If you add another cooler and you don't net a pressure gain then it was pointless.

Adding too much oil cooler, hose, and volume just means your oil pump has to work harder to push all that oil volume and the pressure drop from the cores. There still may be a net beneficial gain however so all I'm saying is have a way to quantify you are doing more good vs. harm.

If someone has already done the testing on a larger core vs. two cores then that might be the way to go. I may run two cores myself but only after I swap to an external oil pump.

[Element Tuning]

Originally Posted by sw20kosh

Does an oil cooler mounted behind the fog light/turn signal bezel (with a cut-out in the wheel well liner to let air flow out) make you face palm?

Fender well is high pressure so not likely a good idea. Out the side, out the top, or out the bottom.

[stugray]

Originally Posted by sw20kosh

Can you explain this more? I don't get how 30 feet of hose is good for pressure?

I am just saying since I have ~30 feet of hose I made sure to use 3/4" hose.

The car is a mid engine with a front oil cooler.
It cant be done without a huge run of oil line.
The factory 914-6 GT had the same setup

The larger the diameter, the less pressure drop for a given amount of flow.