Oil cooler thread.
07-18-2007 | 11:51 AM
#22
Joined: Sep 2005
Posts: 33,556
Total Cats: 6,933
From: Chicago. (The less-murder part.)
Originally Posted by ben
from watching the pressure gauge and interpolting temp from pressure, I would say that my oil is at temp after about 2 miles of driving.
I do like the idea of sticking some racer's tape on the cooler for around-town use. Kicking myself for not having thought of that.
I'm also wondering if instead of my current arrangement with the thermostat plate, the external cooler, etc., if I might be better off installing a factory style oil-to-water heat exchanger. Like the sort found on later-model Miatas, Honda B18C series engines, etc. This would seem an ideal solution, since the water would actually help to pre-heat the oil when the engine is coming up to temperature, and once at operating temperature, the water will never cool the oil below 190 or so.
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07-18-2007 | 07:29 PM
#24
What is the sandwich plate size/thread for a 95 1.8?
To answer a couple of posts at once-
I installed the oil cooler in preperation for the turbocharging as I feared that the Mitsu turbo would add signifigant heat load to the oil system, and I was also uncomfortable subjecting a journal-bearing turbo to extremely low oil pressures (as low as 10 PSI at idle when very hot, if the factory gauge is to be believed). To recap, I'm using the sandwich plate that FM sells (a Mocal part) and a tiny little Earl's cooler.
During my daily commute (about 5 miles) the oil has just about gotten up to 130-140 when I reach my destination. This is too damn cold.
On the highway, with clean air and plenty of it, the oil temperature tends to stabilize around 160-170. Also too damn cold.
Autocross runs are too short to see any real change, and I've never been to a proper trackday, but if I take the vehicle on a nice hard run, such as up the side of Palomar mountain or through the canyons under boost, the oil will peak out at maybe 200-220 degrees.
I have definately err'd on the side of far too much cooling- I suspect that the thermostat is not doing its job.
All oil temp measurements taken on an autometer short-sweep electrical gauge, sender installed in drain plug.
I installed the oil cooler in preperation for the turbocharging as I feared that the Mitsu turbo would add signifigant heat load to the oil system, and I was also uncomfortable subjecting a journal-bearing turbo to extremely low oil pressures (as low as 10 PSI at idle when very hot, if the factory gauge is to be believed). To recap, I'm using the sandwich plate that FM sells (a Mocal part) and a tiny little Earl's cooler.
During my daily commute (about 5 miles) the oil has just about gotten up to 130-140 when I reach my destination. This is too damn cold.
On the highway, with clean air and plenty of it, the oil temperature tends to stabilize around 160-170. Also too damn cold.
Autocross runs are too short to see any real change, and I've never been to a proper trackday, but if I take the vehicle on a nice hard run, such as up the side of Palomar mountain or through the canyons under boost, the oil will peak out at maybe 200-220 degrees.
I have definately err'd on the side of far too much cooling- I suspect that the thermostat is not doing its job.
All oil temp measurements taken on an autometer short-sweep electrical gauge, sender installed in drain plug.
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07-19-2007 | 01:43 AM
#27
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Joined: Jul 2005
Posts: 6,420
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Savington, I believe I have an unused Mocal sandwich plate adapter with built in t-stat. I will sell it to you for the new price less $15, no shipping no tax. 
I used a small Setrab cooler, and I just used blue 10-AN push-on Aeroquip rubber hose (i.e. no SS braid, no clamps). 6 years later, no probs at all.
I used a small Setrab cooler, and I just used blue 10-AN push-on Aeroquip rubber hose (i.e. no SS braid, no clamps). 6 years later, no probs at all.
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07-19-2007 | 03:27 AM
#28
Thread Starter
Joined: Nov 2006
Posts: 15,442
Total Cats: 2,104
From: Sunnyvale, CA
Jason, you've got a deal. I'm out of town every week until August, but hopefully we can meet up sometime to exchange goods, and compare suspension setups as well.
High-temp rubber scares the **** out of me in that application, though. You really have had no problems? What do your oil temps look like on-track?
High-temp rubber scares the **** out of me in that application, though. You really have had no problems? What do your oil temps look like on-track?
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07-19-2007 | 07:28 AM
#29
Junior Member
Joined: Mar 2007
Posts: 130
Total Cats: 0
From: Singapore
Hey guys!
I suppose a -6AN fitting would really be pushing it?
Thing is, I've got a MOCAL with 6AN fitting and hoses with connectors to go as well. Somehow I dun really quite think it's a good idea to use such small fittings.
Should I use an adaptor at the head of the oil cooler? or just machine an adapter?
BTW.....anyone can point me to a place where i can get an oil cooler sandwich (or take-off) plate, who is willing to ship to Singapore and willing to take Paypal?
I suppose a -6AN fitting would really be pushing it?
Thing is, I've got a MOCAL with 6AN fitting and hoses with connectors to go as well. Somehow I dun really quite think it's a good idea to use such small fittings.
Should I use an adaptor at the head of the oil cooler? or just machine an adapter?
BTW.....anyone can point me to a place where i can get an oil cooler sandwich (or take-off) plate, who is willing to ship to Singapore and willing to take Paypal?
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07-20-2007 | 01:10 AM
#31
Elite Member
Joined: Jul 2005
Posts: 6,420
Total Cats: 84
Jason, you've got a deal. I'm out of town every week until August, but hopefully we can meet up sometime to exchange goods, and compare suspension setups as well.
High-temp rubber scares the **** out of me in that application, though. You really have had no problems? What do your oil temps look like on-track?
High-temp rubber scares the **** out of me in that application, though. You really have had no problems? What do your oil temps look like on-track?
FWIW the BMW 335i goes into limp mode at 300*F+ oil temps.
The high temp rubber seems fine, I inspect it once in a while. It's supposedly made for it.
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08-07-2007 | 08:15 PM
#33
Staying on the oil cooler subject...
A question about a reference or two I have heard about later model miatas with oil coolers. What is this? I remember hearing this before and nobody really going into depth on the subject.
So did later model miatas come stock with oil coolers? Anyone know which years? And if the car came with one, anyone know how effective these factory coolers were? Easy to upgrade?
A question about a reference or two I have heard about later model miatas with oil coolers. What is this? I remember hearing this before and nobody really going into depth on the subject.
So did later model miatas come stock with oil coolers? Anyone know which years? And if the car came with one, anyone know how effective these factory coolers were? Easy to upgrade?
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08-07-2007 | 08:36 PM
#35
Staying on the oil cooler subject...
A question about a reference or two I have heard about later model miatas with oil coolers. What is this? I remember hearing this before and nobody really going into depth on the subject.
So did later model miatas come stock with oil coolers? Anyone know which years? And if the car came with one, anyone know how effective these factory coolers were? Easy to upgrade?
A question about a reference or two I have heard about later model miatas with oil coolers. What is this? I remember hearing this before and nobody really going into depth on the subject.
So did later model miatas come stock with oil coolers? Anyone know which years? And if the car came with one, anyone know how effective these factory coolers were? Easy to upgrade?
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08-07-2007 | 08:41 PM
#36
Ohh my '99 does have the sandwich at the filter. I don't consider that to be an oil cooler. I was thinking more like what we usually add-on to our cars with a heat exchanger. Big 1/2AN fittings and a sandwich plate of some sort with no where to put the oil cooler itself.
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08-07-2007 | 08:43 PM
#37
A lot of people who do coolant re-routes or 1.6-->1.8 conversions ignore this feature. It's not really essential.
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11-24-2007 | 11:45 PM
#40
Thread Starter
Joined: Nov 2006
Posts: 15,442
Total Cats: 2,104
From: Sunnyvale, CA
Bumping this thread. Where's the best location for an oil cooler? I'm thinking between the IC and radiator, maybe off to one side, but I'm wondering if that's just going to further hinder airflow to the radiator.
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