Rb25 Oil Cooler

[GT500_Racer]

quick question, im debating on to keep the stock oil cooler/warmer unit or get rid of it.... planning on running a oil cooler for track purposes

Is it still fine to keep the oil oem unit, and slap a oil cooler relocation unit + cooler on ? Every write up ive seen has had ppl remove them, and having limited space looks like a challenge in getting to the unit and removing the stud itself

cheers

[GTRPSI]

The answer to that question is will your oil temp go up quickly enough on track before you blast it without the OEM water unit?

We know of one engine setup with exactly the same clearances as our current build that takes 40min to an hour to get oil temps up to a safe working level........hence why we will run our water unit to help add heat quicker with a thermostatically controlled oil cooler setup to take over once the oil is hot.

[Dose Pipe Sutututu]

Keep it, you'll need it to regulate temps also install an oil thermostat.. don't get those China pride kits, they're garbage and will leak everywhere

[BlackBox]

What oil thermostate are you using GTRPSI?

I have a grex/greddy unit that I haven't installed yet because I can't make sense of its operation. When I blow through the ports it's as if it is already open and oil would be flowing through the cooker, I contacted garage 7 who I purchased it from and they tell me that their items on shelf behave the same way and that's the way greddy have intended it to work, even tho they dont understand it either?

[KiwiRS4T]

Thermostats usually will not close completely but will allow some flow until they reach opening temperature when they open right up.

[Dose Pipe Sutututu]

The flow a little to reduce air pockets in the oil cooler lines/oil cooler itself.

I run the same unit, which can be seen here on my car:

http://www.trak-life.com/diy-r33-skyline-oil-cooler-with-thermostat/

[scotty nm35]

Bob is correct as usual, it is designed to bypass 10% or so to stop thermal shock loading. Remember the oil in the cooler could possibly be 0 degrees, and if that thick oil hit your bearings at 8k revs as the thermostat opened it could cause failure.

The Grex kit is very nice quality, mine has been on for 6 years on my daily Stagea and allows for quick oil heating in the mornings, even though I run a 30 row cooler.

[BlackBox]

Ah yes forgot to mention I am aware it will 'bleed' some oil through even when closed, but it seems that it is 50% going through cooler and 50% bypassing.

[BlackBox]

Port 1 and 1a is oil supply from engine

Port 2 is return to engine

port 3 is supply to cooler

port 4 is return from cooler

When i blow port 1 air comes out around where the filter would sit and would then flow into port 1a.

when i blow port 1a air comes out of Port 2,3 and 4 .

When I block any 2 of these ports the flow is unobstructed.

I expected that when I block ports 2 and 4 the flow to the port 3 (oil cooler supply) would be through a small orifice and would be difficult to blow through until the thermostat had opened.

[GTRPSI]

What oil thermostate are you using GTRPSI?

I have a grex/greddy unit that I haven't installed yet because I can't make sense of its operation. When I blow through the ports it's as if it is already open and oil would be flowing through the cooker, I contacted garage 7 who I purchased it from and they tell me that their items on shelf behave the same way and that's the way greddy have intended it to work, even tho they dont understand it either?

Grex, as mentioned they are designed to leak through......keeps air locks out.

Can you imagine it opening after you fitted it and no oil was in it?

[GT500_Racer]

thanks guys, exactly what i thought cheers