Engine + Transmission Oil Cooler Install

[SECURITY]

i've got an oil cooler kit ready to install and a tranny cooler kit on its way. my problem is choosing which way to face the cores to get the best flow/cooling effect. my car is an auto r33 gtst.

i've really only got 3 options which ive drawn up to stop any confusion of what i'm talking about (sorry about my dodgyness, its 3:20am).

these are my thoughts on each option. i dont know how much pressure is inside the trans system so bear with me.

#1 will make the oil flow too quickly out of the core because of gravity + pressure, plus i dont think the trans oil will flow through the entire 19rows, it may mainly use the first 10 because of the low pressure in the system.

#2 might be ok as the oil will spend more time in the cooler as well as utilise the entire core. but i also think that the trans cooler will drop in pressure as its trying to push the oil out against gravity.

#3 im not too fond of. pretty much the same reason as #1.

i've seen installs using all 3 directions and im really not sure which one is the best, or even if my ideas are right, thats why ive come to you guys

the engine oil cooler should be fine to use #2 with as even on idle it has around 30psi of pressure, so it will utilise the entire core as well as have enough psi to get the oil flowing, whereas the transmission cooler has less pressure so im not too sure about it.

this probably isnt a huge deal to alot of you guys but its been playing in my mind for a few hrs.

[AlexCim]

On my car, its mounted like number 3. If i touch the core after driving, the whole face is as hot as the rest.

On STAGENS car, we mounted it like number 1.

I cant really tell you whats best because like you say, ive seen all 3 done, but the stock one is mounted like number 3 (or at least, thats the closest one there)

Does the line pressure increase with RPM to increase flow?

Best to call MV Automatics or www.keas.com.au

[T04GTR]

makes no differance at all

although #1 with the flow reversed will have a better effect for self bleeding

[saliya]

^^^ what he said; all the pros I spoke to before installing mine recommended in at the bottom, out at the top.

I'm sure there's a reason for that. This was for engine oil, not trans oil btw.

I'd also put a thermostat on there somewhere so that oil doesn't go through the cooler if it doesn't need to, particularly

if this is something that you drive on the street.

You also want to get it in the airflow somewhere, and if it's at all possible, shroud/duct it so that air has no choice

but to go through it. Shrouding made a big difference with my in-guard cooler.

Regards,

Saliya

[SECURITY]

thanks for that guys. i'll use #1 with the reversed flow for my engine oil cooler.

what about the trans cooler? what kind of psi would it see?

[SECURITY]

Does the line pressure increase with RPM to increase flow?

yeah it does. it'll reach around 120psi, which is the 8 (bar) in the standard gauge.

[CruiseLiner]

slightly offtopic but is it better to run the oil cooler inline with the remote filter or have 2 Y pieces off the engine sandwich plate and run them seperately? as i thought otherwise thermostat wouldnt work without blocking the engines oil supply if it was inline???

[saliya]

slightly offtopic but is it better to run the oil cooler inline with the remote filter or have 2 Y pieces off the engine sandwich plate and run them seperately? as i thought otherwise thermostat wouldnt work without blocking the engines oil supply if it was inline???

You run the thermostat inline with the filter; all oil goes thru filter + thermostat.

The thermostat has 4 connections, IN, OUT, TO COOLER, FROM COOLER

and at below-thermostat-temp flow goes IN-OUT (i.e. bypasses cooler).

At thermostat temp flow goes IN-TO COOLER-FROM COOLER-OUT (i.e.

through the cooler).

Regards,

Saliya

[SECURITY]

so does anyone know the best way to run the cooler for a transmission?

[Abo Bob]

My trans cooler is set up as 3 but stock it was 1.

[SECURITY]

why is it set up as 3? is there any specific reason or is this just what fit best?

[Abo Bob]

Yeah just what fit best. It's kind of long and thin rather than square and I was moving it to the front guard rather then in front of the radiator so it had to go in landscape instead of portrait. I would have had to get longer hoses to be like 2 so I didn't bother.

I have a trans fluid temp gauge in now and it does not overheat on the track.

[WazR32GTSt]

mine is as #1

does it really matter? really?

no, i don't think its going to affect the operation of the transmission

you're just being pedantic about your car, which is not a bad thing, just worrying about something that really doesn't need to be worried about

[SECURITY]

its not really an "omg omg i better not to this wrong" kind of thing. i just wanted your views. the way i see it is if im going to build a performance car, i might as well have things set up by taking advantage of every aspect possible.

plus i think it would matter in terms of utilising the entire core.. let me explain it properly by a pic.

this is what i mean when i say utilise the whole core, i want the oil to spread evenly, and in turn cool better.

this is how i think they would work, im not a mechanic but its just how it works in my head.

#1 seems to be the better choice as its utilising the whole core as the oil will spreak evenly

#2 has the whole gravity thing working for it, so i guess thats ok.

#3 has gravity working against it so it wont really utilise the whole core, mainly just the bottom half of it or so.

i think ive got a point.. im not being padantic... not entirely anyway

what do you guys think?

[Craved]

i think that the oil will be under pressure, so you wont have any uneven flow as the pressure should force the oil to the lower pressure areas, so it'll utilise the entire core.

[SECURITY]

yeah im sure the engine oil will be fine with any of these set ups.

its the trans oil im worried about. im not sure what kind of psi is in the system.

[SECURITY]

i found out that transmission oil pressure will hit figures of around 40-70psi. install #1 will be fine

[wrxhoon]

its not really an "omg omg i better not to this wrong" kind of thing. i just wanted your views. the way i see it is if im going to build a performance car, i might as well have things set up by taking advantage of every aspect possible.

plus i think it would matter in terms of utilising the entire core.. let me explain it properly by a pic.

this is what i mean when i say utilise the whole core, i want the oil to spread evenly, and in turn cool better.

this is how i think they would work, im not a mechanic but its just how it works in my head.

#1 seems to be the better choice as its utilising the whole core as the oil will spreak evenly

#2 has the whole gravity thing working for it, so i guess thats ok.

#3 has gravity working against it so it wont really utilise the whole core, mainly just the bottom half of it or so.

i think ive got a point.. im not being padantic... not entirely anyway

what do you guys think?

Install as per figure one but reverse the inlet and outlet. In at the top out at the bottom .

[SECURITY]

Install as per figure one but reverse the inlet and outlet. In at the top out at the bottom .

why?

[wrxhoon]

why?

Same reason your radiator hoses are like that, heat rises.