Oil temp
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Cruiser
Joined: Jul 2012
Posts: 134
Likes: 3
From: Louisiana
All I know is the Jagg cooler for an Evo will not work on a Twin cam. Jagg made that very clear when I was asking them about the cooler. The sales person asked me twice saying wow a 1997 Ultra, Don't get to many calls for parts for those, and a model bla bla bla will not work thats for the twin cam you need part # Bla,bla bla.
Extreme HDF Member
Joined: Jun 2011
Posts: 10,216
Likes: 224
From: Glendale AZ
Hey Jake I thought your were moving to Arizona, did you get smart and talk yourself out of it?
Road Master
Joined: Oct 2011
Posts: 799
Likes: 2
From: WyoBraska (Western Nebraska)
I'll give ya the short version: Yes, I was and was working with real estate agents there and here: cleaning the shop out, selling stuff that I would not normally sell. Wife went to Phoenix, spent 6 weeks with her Dad for a surgery he had, came back and told me we were NOT moving !!! WTF ?! Wasn't my idea in the first place !!
So, short answer: NO. Which is just as well. It has been hot enough here as it is !
Banned
Joined: Apr 2012
Posts: 648
Likes: 9
From: WV
Pre-Twin Cam motors have a different oiling system, the oil gets filtered after it goes through the motor, so the oil cooler is getting the oil at its hottest point in the cycle, greater heat has greater potential for cooling, this is the same basic concept that guided me to a colder thermostat for the Twin Cams. Unfortunately there is no way to "tap" the system in a Twin Cam to send the oil to a heat exchanger as it comes out of the motor at its hottest point, If we could do this you would see much lower temps in the Twin Cam platforms
Thread Starter
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Cruiser
Joined: Jul 2012
Posts: 134
Likes: 3
From: Louisiana
Ok, brought the Ultra to my mechanic. He removed the oil temp sensor and inserted it into oil that he had heated up to 230*. The temp gauge on my dash jumped up to 230*. We then reinstalled the sensor and cranked up the bike for 25 minutes. the dash oil temp gauge now was at 130*, he then turned the engine off and removed the oil filter and inserted a manuel oil themometer. It read 205*. So here is what is happening. Oil leaves the oil tank, passes over the oil temp sensor, then goes to the engine, then out the engine, through the oil filter then through the oil cooler and back to the oil tank. The cooler is dropping the oil temp so that the oil leaving the tank never gets above 130*. I also purchased yesterday a Jagg Manuel by-pass switch for by-passing the cooler in the cooler times of the year. Remember, this is a evo motor also, they run quite cooler than a twin cam!!
Last edited by liferider; Jul 19, 2012 at 04:04 PM.
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Extreme HDF Member
Joined: Sep 2005
Posts: 11,615
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From: Baton Rouge, LA
I don't think it has much to do with EPA regs, as I'm running 14.5:1 AFR (near stock) in the cruise range and oil normally stays 200-205° in summer when moving, with the help of an oil cooler, rarely hitting 230° in traffic. That's not as good as these Evo guys are reporting, as their OT is what I learned to expect from my old Evo, which rarely exceeded 180° in summer under any conditions. I think most of this is attributable to the piston spray feature on TC engines, which Evos don't have, and that tends to transfer quite a bit of engine heat to the oil. IMO this heats the oil but may make the engine itself run cooler. I don't know this for sure but suspect this may be true. It'd be interesting to see what kind of CHT's Evo riders are getting.