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chuck21401 · Joined: 20 Feb 2005 Posts: 527 Location: Annapolis, MD

Anyone running a larger oil cooler or multiple oil coolers? I've turned up the boost on my car...wondering if additional oil cooling would be helpful.

Looking through old threads, someone mentioned running two stock coolers (93120705101) in series (I'd like to see how those are mounted), someone else suggested adding a larger oil cooler in place of the stock cooler (any recommendations)? My washer bottle was leaking so I've already removed that...so more room for a larger cooler if needed in the stock location. I'm aware that the 924 Carerra gt and GTS moved the cooler up front, better air flow maybe?

What size are the fittings on the stock oil lines/cooler? M22? I'm not seeing any sources for metric lines, looks like I'd have to convert to AN...AN12?

(pic borrowed from ancient thread on Pelican parts)

Source for these pics: https://canepa.com/photo-gallery/1981-porsche-924-carrera-gts-club-sport6648/

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1981 Porsche 931 w/S1 engine & g31 transmission. Water-cooled intercooler

Cedric · Joined: 27 Aug 2004 Posts: 2610 Location: Sweden

If you dont track it i would not bother changing it. To get more space for the IC end tank and some additional cooling area i had to swap my original one for a narrower setrab with Banjo connectors. A hydraulic hose shop cut of the old lines and pressed on new teflon steel braided ones for more bendability.

I dont know if its enough, i have some ducting around it aswell. The future will tell

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1980 924 Turbo
www.instagram.com/garagecedric/

chuck21401 · Joined: 20 Feb 2005 Posts: 527 Location: Annapolis, MD

Cedric · Joined: 27 Aug 2004 Posts: 2610 Location: Sweden

Step one get a oil temp sensor and guage

i drilled my oil plug and put the sensor there, quick and easy. its not easy to get up to high oil temps on the road, even if you hammer it, i don't live on the hottest place on earth though

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1980 924 Turbo
www.instagram.com/garagecedric/

924RACR · Posted: Mon Sep 25, 2023 8:44 pm Post subject:

It seems to me that the stock design of oil manifold/thermostat and pipes out to the cooler is very space-efficient, I'd be inclined to keep that.

But as noted replacing the hose portion would be wise... maybe just in the process have a different non-metric end crimped on, converting to AN for the widest options?

Otherwise, I'm pretty sure Pegasus has the necessary metric adapters... but they're very expensive.

All assuming you need more cooling, as noted. I've found mine is fine with oil pressure (indirectly reading the temp) running VR1 20W50, in ambients up to 90F in traffic... so not boosting, but massively heat soaking. Note that I'm running 14psi and a 951 IC.

So I have no plans for an oil cooler upgrade for this car.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

Carrera RSR · Joined: 08 Jan 2010 Posts: 2309 Location: Somerset, UK

No issues with stock oil cooler on my well modified, higher boosted motor. It is running an ally 944 turbo +50% sized coolant radiator. Runs very cool.
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1980 931 - forged pistons, Piper cam, K27/26 3257 6.10 hybrid turbo, 951 FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife
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