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Oil Cooler Question

Oil Cooler Question

B0nes
8 days ago

Hope everybody doing well. Need to pick the brains on here regarding oil coolers. Looking to fit an oil cooler to the Night Train, QLD's gonna get hot this summer. Was thinking of something like this, the centre mounted option I think would suit the style I'm after on the bike. Just not sure about airflow over the front cylinder. Or would side mounted be the better option
https://ultracoolfl.com/product/softail/

tussuck
8 days ago

Is it really needed? I have run the old FXR fully turboed in 40 degrees with no issues. I'm kind of the view its a bit like snake oil....

Retroman
8 days ago

I have tried the genuine "plumbed in" oil cooler on a 2008 Softail.

Both exxy and a bit of a tosser to fit. Dropped the oil tank temp 20F while running, measured on a high 30's day.

I also used (and still do) on another 2008 Softail an older "push on" oil filter cooler collar. Finned alloy gizmo.
Sold as a genuine HD part up until maybe 2008, then for years from the maker eBay USA direct.
NOT expensive at the time. BUT I can't find the guy now, and I have tried my old email address for him.
Back then I bought them from him in multiples, and put them on all my mate's bikes

I tried it next to the Genuine plumbed in HD cooler, on the same day, and it dropped the oil tank temp by 20F

That has to help with mechanical reliability, remembering the Twin Cam ran hotter than the EVO it replaced.

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Hilly
7 days ago

This is what Retro is talking about, I had one, lent it, never saw it again.

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T4
7 days ago

Have a similar sort of oil filter/cooler that sits out in the airflow for both my Sportsters. Has the added advantage of a cleanable filter. They do kits for other Harleys apart from Sportys, though not sure which models. Cannot remember the name of the crowd; something like K&P Engineering (K&S maybe ?). I'll look it up and get back to you.

Cheers, Will

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Wanderer57
7 days ago

Looks like K&P Engineering. I have had one on the 16 Heritage for a few Years, and have one ready to fit on the 23 SG. I swear by them. Their web site lists all the makes and models including cars and 4 wheelers etc and there are a few distributors in AUS. Not cheap, about $300 these days but I like the idea of seeing whats in the filter and not having to replace. Good magnet and relief valve. Most Harleys will use the P/N S4 from memory.
For the oil cooler proper I fitted an Ultracool, fan assisted to the Heritage. It works well, and fans come on when tank dipstick temp reads about 107C.

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T4
7 days ago

You are correct Wanderer. I found some shit amongst all the crap in the shed. Caution: it involves reading!

I did get the actual filter from someone in Brisbane (I think, though I haven't turned up who it was yet); they were good to deal with and prompt to send stuff and had spare parts (springs and seals etc). The relocation kit I got from DK Custom Products in the states; again good to deal with.

Cheers, Will

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Retroman
7 days ago

Quoting Hilly on 14 Dec 2024 02:48 AM
This is what Retro is talking about, I had one, lent it, never saw it again.

Yep them's the puppies.
Mate of mine just bought one NOS from a new Harley parts clearance place stateside.
He spent a while scouring ebay USA and one came up eventually.
I can't track the original maker, I believe he had a home workshop and supplied Harley with them at one time.

This mate's 2010 Dyna has an oil temp dipstick , the digital LCD type and it showed his oil temp dropping 20F
So they are consistent.

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B0nes
6 days ago

Thanks fellas. Have a few ideas which I'm going to dig into and have a look at the best options. Checked over the bike last service and had the oil analysed by a mate who works on aircraft engines for a living, he gave it the thumbs up for wear with nothing out of the ordinary. I'm just a pedantic prick when it comes to my 01 Night Train. My 14 year old nephew wants it when I die, told him I plan to have it buried with me when I fall off the perch. Told him he can have the Ultra instead.

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speedzter
5 days ago

i run a side mount Jagg cooler on my Dyna .
I believe the side mount is the most efficient design, and they definitely work well at lowering oil temp' .

Another option that has a drastic affect on oil temperature is a cylinder cooling fan .
Works especially well at lower speeds, but oddly enough , it even has an affect at highway speeds depending on the wind direction .
I run a cylinder head temperature gauge for monitoring .

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perthhog
3 days ago

Quoting Hilly on 14 Dec 2024 02:48 AM
This is what Retro is talking about, I had one, lent it, never saw it again.

Quoting Retroman on 14 Dec 2024 01:04 PM
Yep them's the puppies.
Mate of mine just bought one NOS from a new Harley parts clearance place stateside.
He spent a while scouring ebay USA and one came up eventually.
I can't track the original maker, I believe he had a home workshop and supplied Harley with them at one time.

This mate's 2010 Dyna has an oil temp dipstick , the digital LCD type and it showed his oil temp dropping 20F
So they are consistent.

Been running one of them slip on coolers on my evo for as long as I’ve been here
Think I picked up on that tip here many moons ago I also run a ultima/ Midwest
Down tube type on my other bike which is better the slip on in my opinion
Just have to use the right filter with the slip on as some it doesn’t hold onto them

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Retroman
2 days ago

Yes indeedy.

they work best with the original OEM Harley filters , just the right amount of "grippage'.

I know for sure that they are too loose on K&N and AC Delco filters.

Back in the day for the price they were the best bang for the bucks spent.

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Retroman
3 hours ago

Bought 3 new genuine HD oil filters to top up my shed stock, and put one on my own bike yesterday. Had 3 already on the shelf.

Pushed the oil cooler collar back on and it was LOOSE ?

Measured the "new" batch filters against older stock maybe 6 months old, and yes the new batch is fractionally (1mm) smaller !

Even just lifting an "older" filter out the OEM box the cooler collar is a snug interference fit, and once hot it's not moving

Cooler collar was sliding/vibrating off this latest filter as I rode. Can't come right off thankfully.

Teeny bit O' silicone will fix that until this time next year, but worth knowing.

Harleys filter manufacturer must have tweaked specs I reckon.

I already knew the collars were loose on K&N and AC Delco filters.

May have to try some others.

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