Cooler twin Cam engine
#21
07-21-2017, 06:00 AM
Road Master
OK. When I run at highway speeds 231 F was not uncommon with ambient air at 85 to 90 F. Although getting mother nature to repeat exact same conditions is sometimes a challenge, what I have noted since doing this is oil bag temperature on average at 227 F. Small difference but a positive change. .
#23
07-21-2017, 07:58 AM
Unofficial HDF Chaplain
The theory sounds reasonable. It would be interesting to get a true temp reading though. How about you being our guinea pig? Take your bike for a ride and get it good and hot then stick a thermometer in the oil. Then do the same after the mod, just make sure the ambient temps are the same or within a degree or so. That would be a scientific enough experiment to satisfy me and most others on here I reckon.
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LenBoyLo (07-21-2017)
#24
07-21-2017, 09:32 AM
Sorry about the pictures. I did in fact put two up yesterday. But within a few hours they were gone. Dunno. Maybe something with protocols and permissions. Anyhow use your imagination. In your minds eye view the timing cover medallion spaced 1/4 to 1/2 inch out from the recess it is retained in by the five torx head machine screws that hold it there. Cheers.
Hey fullautomike. The way of physics is that if the temperature differential is further apart the higher the rate of heat absorption or dissapation. A full 4 degree oil temp difference on an 85 to 90 degree day is nothing to sneeze at. If the air outside gets cooler the temperature differential widens and the efficiency increases.
Hey fullautomike. The way of physics is that if the temperature differential is further apart the higher the rate of heat absorption or dissapation. A full 4 degree oil temp difference on an 85 to 90 degree day is nothing to sneeze at. If the air outside gets cooler the temperature differential widens and the efficiency increases.
Last edited by ChickinOnaChain; 07-30-2017 at 06:01 PM.
#25
07-21-2017, 10:06 AM
4° cooler is 4° cooler. Maybe not a lot, but a definite move in the right direction.....
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tar_snake (07-24-2017)
#26
07-21-2017, 10:41 AM
For the low cost and minimal time invested why not. Completely optional and fully reversible. A proverbial no brainer.
Last edited by LenBoyLo; 07-21-2017 at 02:20 PM. Reason: reverseable. not irreversable. wrong word first time.
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4 inch pistons (07-21-2017),
tar_snake (07-24-2017)
#27
07-21-2017, 11:25 AM
Road Master
Yep! I will be trying this. Can't see what it would hurt. Thanks for the tip.
#28
07-21-2017, 02:31 PM
Folks; Yesterday said maybe try 1 1/4 inch long screws. My first time try out I created little studs. So I tried 1 1/4 myself today. In my opinion a little too long. Stands the medallion too far out. 1" machine screws would be more appropriate. And gently bottom them out in the five threaded holes in the timing cover. If you go too short on the machine screws you may not be able to run the jam nuts up against the back side of the medallion. Cheers.
Folks; Playing along with my suggestion for slightly enhanced twin cam cooling, I left the 1/1/4 machine screws in place. Then decided I could enhance the cooling even more with a foil to direct outside cool air in to the timing cover cavity. Observations are that I can touch my little finger to the surface at the back of the cavity and keep it there comfortably for many seconds after pulling over. The cooling effect works. Pics are first rendition and then yesterdays further experimentation. Realizing the looks can be improved. Just playing with functionality right now.
I hope the photos stick around for a while this time.
Folks; Playing along with my suggestion for slightly enhanced twin cam cooling, I left the 1/1/4 machine screws in place. Then decided I could enhance the cooling even more with a foil to direct outside cool air in to the timing cover cavity. Observations are that I can touch my little finger to the surface at the back of the cavity and keep it there comfortably for many seconds after pulling over. The cooling effect works. Pics are first rendition and then yesterdays further experimentation. Realizing the looks can be improved. Just playing with functionality right now.
Last edited by ChickinOnaChain; 07-30-2017 at 06:02 PM.
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tar_snake (07-24-2017)
#29
07-22-2017, 12:23 PM
Tourer
Folks; Playing along with my suggestion for slightly enhanced twin cam cooling, I left the 1/1/4 machine screws in place. Then decided I could enhance the cooling even more with a foil to direct outside cool air in to the timing cover cavity. Observations are that I can touch my little finger to the surface at the back of the cavity and keep it there comfortably for many seconds after pulling over. The cooling effect works. Pics are first rendition and then yesterdays further experimentation. Realizing the looks can be improved. Just playing with functionality right now. I hope the photos stick around for a while this time.
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LenBoyLo (07-22-2017)
#30
07-22-2017, 12:43 PM
betho61. Maybe try logging out and then back in ? I'm seeing them on my computer. Or suggest a way for me to make it so everyone can see. I'm just a jack of most trades and computers isn't one of them. Hahaha.
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betho61 (07-22-2017)