Beehive banjo thread ?

[Victorsanders]

Hey all.. I’d planned to ditch the S3 beehive cooler for a rad style.. I have since decided I’m gonna keep the beehive and run from that through a cooling rad and back to the front port (best of both worlds hopefully) .. would anyone happen to know what thread the banjo connection is please as il need to find the appropriate fitting to convert to AN

Thanks in advance

Vic

[Hellramsden]

Ive just done this exact thing!

I cant remember which way round though, one is the rear iron and one the front cover.

AN -10 (AN10) to M18 x1.5 Metric Straight Adapter Black
https://www.ebay.co.uk/itm/360756437695

AN -10 (AN10 AN 10) to M16x1.5 Metric Adapter Black
https://www.ebay.co.uk/itm/362145583813

[Victorsanders]

Thank you for your response .. that’s not quite what I’m looking for.. I have the adapters for the front and rear irons.. I’m looking for the thread on the banjo bolt of the oil connection on the beehive oil cooler. Il attach a picture of what I mean

IMG_1777.jpeg (88.48 KiB) Viewed 747 times

Many thanks

Vic

[Hellramsden]

Ah apologies, just been out and measured it for you.

M18x1.5

PXL_20250806_152910313.jpg (443.56 KiB) Viewed 741 times

PXL_20250806_152838849.jpg (362.03 KiB) Viewed 741 times

[Victorsanders]

You are an absolute diamond thank you!

[gt_james]

Just so you know, the oil pump is at the front of the engine, so with the layout you described, the flow path is out from the front iron, via the front oil cooler, then to the beehive, then the filter and then into the rear iron.

I don't really see any benefits of running the beehive, just more weight, more clutter, more connections and components that are prone to leakage, and after cooling the oil with your front oil cooler, you then potentially add more temperature from the water cooling system.

With an aftermarket front oil cooler, without oil thermostat, the oil still warms up very quickly in my experience, so why the need for the beehive?

I could maybe understand wanting to do this if you only ever used the car on very short journeys (never ideal), and you have a sandwhich plate under the cooler to run the oil to an oil thermostat, to direct flow directly to the rear iron instead of the beehive when warm, and through the beehive when cold, but you'd have to run an oil filter somewhere to do this, make an adaptor plate etc, seems difficult for the slight benefit of faster oil warmup, but then best oil cooling when up to temperature, but the complication just far outweighs the benefits.

[Victorsanders]

Hi James

Thanks for the info. I’m aware of the flow path.

I’d been swaying back and fourth with rad cooler or water cooler for a while .. I was dead set on just the rad cooler after reading into the inefficiencies of the water cooler .. but iv been speaking with a chap from Japan who races rotaries and he advised that he sees more stable oil temps from running both. As the water cooler keeps the oil more inline with running temp while the radiator removes spikes due to heavy load, hot weather, static traffic etc. essentially removing the inefficiencies of the water cooler.

It might be absolute crap. But I’m willing to give it a shot in the name of science !

If it doesn’t work, it’s half a days work to revert back to rad only.

I’m making the oil lines myself with AN fittings so I’m not worried about it looking cluttered.. my OCD won’t allow that