Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[nevadabob]

Notice that NOWHERE does any of the literature mention the words "water cooled"...or I can't find any mention of it.  H2O is a dirty word to HD loyalists.

That is because it isn't, Water doesn't cost 30 dollars a pint like Synwater does!

[GregKhougaz]

"Twin Cooled Graphic"

[Cosmic Charlie]

Question ?

Won't the Radiator Lowers now just throw the heat onto yours knees / shins area ?

[SuperGlideSport]

Apparently the new Twin-cooled engines lost the oil cooler. Seems like a bad trade-off to me.

Frank

[Midnight Rider]

Question ?

Won't the Radiator Lowers now just throw the heat onto yours knees / shins area ?

From looks and rider reports, the hot air is "blown" out the sides of the lowers, towards the top, and the lowers are a bit wider where it matters most.  Legs are ventilated by an open/close vent inboard of each lower.

[CVO2FIXUP]

I predict the 2015 Twin-Cooled HD engine will come with a revolutionary 1 gallon cooling system which includes a new coolant overflow reservoir that will help solve the problem of steam venting from the radiator cap during long periods of slow speed operation.  This announcement will follow a previous announcement of the new Harley Davidson proprietary engine coolant, SynWater, that is required to maintain the bike's warranty.  Included in 2015 as a standard item on CVOs will be the currently optional steam whistle that can be installed to replace the existing electric horn. 

  If you are using  the HD "SynWater" you will be required to go to frequent confessions to wipe those "sin's" clean!! 

[grc]

Apparently the new Twin-cooled engines lost the oil cooler. Seems like a bad trade-off to me.

Frank

Why?  Most of the heat picked up by the oil comes from two places, the heads and the piston cooling jets.  If you drastically reduce the wide swings in temperature of the heads common to the air cooled version, I'm guessing the oil temperature will remain more consistent and be less likely to spike to abnormal levels.  Real world experience will be needed before we can pass judgement, but considering the limited effectiveness of the low mount coolers on the previous CVO's I'm going to predict the oil temps will in fact be more stable with the new system.

Jerry

[SuperGlideSport]

Why?  Most of the heat picked up by the oil comes from two places, the heads and the piston cooling jets.  If you drastically reduce the wide swings in temperature of the heads common to the air cooled version, I'm guessing the oil temperature will remain more consistent and be less likely to spike to abnormal levels.  Real world experience will be needed before we can pass judgement, but considering the limited effectiveness of the low mount coolers on the previous CVO's I'm going to predict the oil temps will in fact be more stable with the new system.

Jerry

I guess we'll see. There's not much coolant volume to the new system and it's only removing some heat from the exhaust valve area. Seems to me they could have incorporated a system with more cooling capability, added capacity and included an oil / water intercooler but alas the bean counters still rule the roost.

[dlaws01]

Seems like a "band-aid" solution to an ongoing problem that H-D has known about for some time.  I pity the poor fool that lets them (H-D) sucker them into buying into this screwed up fix.   Come on moco, get your head out of your a$$ and really do something innovative about this and show us some real engineering technology.   

[Midnight Rider]

Why?  Most of the heat picked up by the oil comes from two places, the heads and the piston cooling jets.  If you drastically reduce the wide swings in temperature of the heads common to the air cooled version, I'm guessing the oil temperature will remain more consistent and be less likely to spike to abnormal levels.  Real world experience will be needed before we can pass judgement, but considering the limited effectiveness of the low mount coolers on the previous CVO's I'm going to predict the oil temps will in fact be more stable with the new system.

Jerry

I agree, Jerry.  The proof will be in the pudding, of course, but the oil cooler was pretty much useless sitting in traffic.  And not a hell of lot better when moving, particularly when it's getting 110 degree air across it right off the blacktop. The biggest complaint most have with heat was because of the exhaust port/pipe just inboard of your right inner thigh...cooling that off should prove beneficial, IMO.  IF the system is trouble free, I see no down side to it.

[Rooster]

I agree, Jerry.  The proof will be in the pudding, of course, but the oil cooler was pretty much useless sitting in traffic.  And not a hell of lot better when moving, particularly when it's getting 110 degree air across it right off the blacktop. The biggest complaint most have with heat was because of the exhaust port/pipe just inboard of your right inner thigh...cooling that off should prove beneficial, IMO.    the system is trouble free, I see no down side to it.

I agree Terry IF

[Dead_Reckoning]

Apparently the new Twin-cooled engines lost the oil cooler. Seems like a bad trade-off to me.

Frank

Agreed

I am also curious how HD prevents any warping or distortion of the Cylinder heads with "Only One Side" being Liquid Cooled?

[FlaHeatWave]

Agreed

I am also curious how HD prevents any warping or distortion of the Cylinder heads with "Only One Side" being Liquid Cooled?

The hottest part of the motor is the exhaust, the intake side is cooled somewhat by the incoming air/fuel

[CVOjh]

I am also interested by the answers to the OP question. Will the new CVO stand up to HD claims: more torque and HP and why?

Thanks to the great forum writers that will help us find out. 

[AMEDD_SFC]

Question ?

Won't the Radiator Lowers now just throw the heat onto yours knees / shins area ?

My experience has shown that the twin cooling does not add a lot of heat to my lower legs.  The vents do a great job of letting in air.  Or, at least I can't feel the excess heat over the dang CAT!  .  The stock pipes gotta' go soon!

I rode back from CO across NM and TX.  It was between 95 and 100 all the way.  Stopping in traffic was a bummer, to be sure.  The fans kick in and blow the radiator heat away, though.   I think I had more heat from the heated seat.  Apparently HD engineers though that a toggle switch was better as LO, OFF, HI as opposed to OFF, LOW HI -Rode the whole way back with the A$$ warmer on LO  - DOH! 

When I picked up the bike, I let my brother ride it part way home.  (The only other person who will ever ride my bike).  He has Fat Boy and he definitely noticed the extra heat on the right side coming from the pipes.

AFAIK, the twin cooling was not designed as a heat management solution per se, but a way to further tweak the torque.  What I mean is they weren't necessarily trying to solve a heat problem, but introducing a new feature that allows better performance.  I guess by managing the temps in the exaust ports, MoCO can get a little better torque - not sure of the specifics there.  I imagine there will be after market oil cooling solutions that take up residence somewhere besides where the HOH pump is.

BTW if anyone is wondering, all the cool scientists write H2O as HOH.   

Regards,

M

SFC, USA (RET)