Oil temps and oil cooler overkill

[Eagle 5]

Is it possible to get an overkill oil cooler? Some of the oil coolers I'm looking at have fans attached to them. mostly looking at those from summit racing such as Derale and some others. they have 6 or 8 pass coolers with a 10" fan attached to the front of it.

so my question is, what kind of temps are normal for the oil and would having one of the coolers with a fan on it be bad? such as is it possible to run the oil too cold for the engine?

my idea was to hook the fan for the cooler up to the radiator fan so both come on at the same time. im nto sure if the radiator fan is always running but i figure if the engine is getting hot and the coolant needs cooled down, so would the oil.

price is not a problem as these cost just as much as a basic oil cooler, just seems like it would be better having one with a fan as opposed to not.

also, does anyone know the dimensions of the stock 90 external oil cooler? im only askign as i have the external bracket but i dont have a cooler so im looking for an external one.

 

[Eagle 5]

I should clarify, I have the external oil cooler bracket only. I dont actually have the external oil cooler. When i bought the engine the cooler was not with it. Therefore I need to get one and as I dont plan to switch tp the water to oil cooler, I figure since I have to get one anyway, might as well get something nice as opposed to just a stock 90 external one.

the stock ones may be cheap or semi cheap but considering how old they are, id rather get something new and nice.

 

[gixrman]

I read that anything over 350* on regular and 650* on snythic is were additive break down accurs. I don't have the book with me have to look it up again when I get home/ give you a deff. then.

 

[TSIfreek]

NO NO NO the oil temp is about 20* hotter than the coolant temp (normal driving.) 225* is optimum oil temp and needs to get that hot. If you are running over 300* you have problems.
I dont think there is an oil maid that can withstand 600* F Were did you come up with that. The 1g 90 oil coolers are fine for street driving but if you are going to be racing wheel to wheel on a road course all day then an aftermarket cooler is nessary. RRE would be the first place I would call.

 

[92awddsm]

Actually the optimal oil temp is 180-190* My car will see as much as 220* cruising on the highway with the stock oil/water cooler. I have a new external to install but Im waiting for my turbo to arrive so I can do it all at the same time. Oil begins to break down around 240*.

 

[gsx951]

Look at Setrab oil coolers. You can find them at Bakers Performance and on eBay.
The ones that the NASCAR guys use to cool their axles work nice. I bought my Setrab brand new on eBay for $70.00
These coolers are supposed to have less pressure drop than the ones you are currently looking at but I have no data to support that.

http://cgi.ebay.com/ebaymotors/ws/e...tem=7951334267&category=46095&sspagename=WDVW

 

[Eagle 5]

Here are some of the coolers im looking at, all can be found at Summit Racing

DER-15820 Derale cooler
DER-15830 Derale cooler
FLX-45901 Flex-A-Lite
PRM-12311 Perma cool

another question is, what are the dimensions of the stock external cooler? anyone know or can anyone go measure for me?

Those coolers cost about as much as some of the regular ones do. Some can be foudn cheaper and others more expensive. I figure, maybe get one with a fan and either wire it to the radiator fan, or run a switch to inside the car and then turn the fan on only when racing.

 

[92awddsm]

Here are some of the coolers im looking at, all can be found at Summit Racing

DER-15820 Derale cooler
DER-15830 Derale cooler
FLX-45901 Flex-A-Lite
PRM-12311 Perma cool

another question is, what are the dimensions of the stock external cooler? anyone know or can anyone go measure for me?

Those coolers cost about as much as some of the regular ones do. Some can be foudn cheaper and others more expensive. I figure, maybe get one with a fan and either wire it to the radiator fan, or run a switch to inside the car and then turn the fan on only when racing.

I have a stock 90 style cooler here in front of me and it measures 10"x6". And 1.25" thick.

 

[MigTalon]

check this one. I'm using one of this. it's good for the price

http://cgi.ebay.com/ebaymotors/ws/e...ry=46095&item=7951566820&rd=1&ssPageName=WDVW

 

[gixrman]

I read that anything over 350* on regular and 650* on snythic is were additive break down accurs. I don't have the book with me have to look it up again when I get home/ give you a deff. then.

:laugh: geezz i'm such a f-up sometimes. out of "Forced Induction Performance Tuning" by A. Graham Bell

"A engine should never be driven hard until oil temp. reaches 158*F, while the ideal temp is 203-230*F. It can go as high as 266*F for short periods, but oil breakdown and excessie oxidation will take place above this temp. In a race engine, bearing failure is a possibility anytime oil temp. goes past 266*F and generally HP is lost above 230*F"

Sorry about that, ADD must be kicking in.

 

[92awddsm]

:laugh: geezz i'm such a f-up sometimes. out of "Forced Induction Performance Tuning" by A. Graham Bell

"A engine should never be driven hard until oil temp. reaches 158*F, while the ideal temp is 203-230*F. It can go as high as 266*F for short periods, but oil breakdown and excessie oxidation will take place above this temp. In a race engine, bearing failure is a possibility anytime oil temp. goes past 266*F and generally HP is lost above 230*F"

Sorry about that, ADD must be kicking in.

Im not going to go as far as saying your book is wrong, but those are temps that oil is capable of running. I say the optimal temp(for power and longevity) is about 180-190. I dont have anything in writing to back me up but this is what I have seen when working at http://aedperformance.com/ for 5 yrs operating the engine dyno. We also worked closely with Ethyl Corp trying different oil additives and fuel additives. You would be amazed at bearing wear on an engine running 245-255* after 6-7 pulls at wot with a load.

 

[Eagle 5]

check this one. I'm using one of this. it's good for the price
QUOTE]

basically a mini radiator from the looks. Another question then is, which part connects to the top? I would assume the oil going in would go to the top and out the bottom, but on some both are at the bottom. Does this make much of a difference?

I may look into something like that just becuase its cheaper, and would probably be better than i would ever need.

 

[Eagle 5]

i also would assume that on some engines maybe oil temps are better between certain ranges. though i would not know.

 

[Eagle 5]

check this one. I'm using one of this. it's good for the price

Hey, about how long are your oil lines to and from the cooler? I'm trying to figure out if 4 ft would be enough or if 5 ft would be needed.

Also, how much more oil do you guys with external coolers add?