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The upgrade was a fan to the oil cooler while putting around..
well it lowered oil and ET temps which can be beneficial for some, right? seems worthwhile 'data' on the topic here anyway but should I not have posted it?
The way I read it was the oil cooled heads were a big improvement over none oil cooled ones..
well, there's tons of pages and posts in that thread so guess folks can read it if they want and draw their own conclusions, or just read the HD description on their site .. it's all good ..bottom line is with or without, my bikes have always held up well under under time and mileage tested grueling environmental conditions, probably a few others out there with similar experiences I'm guessing
I read member experiences and data, and mention sometimes. These members were generous enough to repeat their contributions. I don't care about being right, but I do care about trusting members who are nice enough to share their data. Plus, it's just physics that heat conduction from metal to fluid then fluid to air is more efficient than metal to air. I would think most folks know by now, since there have been both air-cooled and antifreeze-cooled engines both for a long time. And the reason engines changed from air-cooled to liquid-cooled was...... (hint: it wasn't because they are cheaper - they're way more expensive).
You're assuming that the reason for adding head oil cooling was to make things run cooler and therefore more reliable. Not sure that is the issue.. From what I can see it was to allow the motor be bigger and run leaner without burning up.. Cole did a bunch of early testing and found M8 actually ran a little hotter than TCs (IIRC).
well, there's tons of pages and posts in that thread so guess folks can read it if they want and draw their own conclusions, or just read the HD description on their site .. it's all good ..bottom line is with or without, my bikes have always held up well under under time and mileage tested grueling environmental conditions, probably a few others out there with similar experiences I'm guessing
Personally HD probably had to add the oil cooling to meet newer emissions (run leaner) and make a little more HP stock than the old stuff..
Personally HD probably had to add the oil cooling to meet newer emissions (run leaner) and make a little more HP stock than the old stuff..
my Rushmore 103 RK lost a lot of power over altitude and high ambient temps and my M8s in the same conditions barely noticeable...whatever the reasons, when it comes to engine heat, less is more I think most people would agree ... off to a dinner ride with friends in hot AF temps..you'll have to continue on without me here for awhile ..maybe I should post that in the TC or M8 ? thread
a long time ago in a galaxy far, far away, Steve Cole did some M8 107 HD fan assisted oil cooler before and after testing using very similar test ride conditions .. for those wanting to review all the deets you can read until your eyeballs get tired but in a nutshell very compelling evidence of improvements .. not sure how the Twin Cooled would have compared
Before Upgrade Results: Measured Peak Engine temperature = 340 F Measured Peak Oil Sump temperature = 267 F Measured Peak Head Oil Return temperature = 290 F
After Upgrade Results: Measured Peak Engine temperature = 302 F Measured Peak Oil Sump temperature = 201 F Measured Peak Head Oil Return temperature = 240 F
He did his data testing in 60-70 degree weather.
He also said it really only made a difference
In slow moving traffic like 35 mph.
Other than that it made no difference than
A stock non- Fan oil cooler.
He never really gave anymore data after that.
my Rushmore 103 RK lost a lot of power over altitude and high ambient temps and my M8s in the same conditions barely noticeable...whatever the reasons, when it comes to engine heat, less is more I think most people would agree ... off to a dinner ride with friends in hot AF temps..you'll have to continue on without me here for awhile ..maybe I should post that in the TC or M8 ? thread
You know that reminds me.
I havent felt any real power loss in my bike from altitude nor heat. I put the overheat warning on my PV at 325F and even at 340~350, a ring of the throttle to take position while splitting didnt feel any weaker at all.
Maybe it'll be more noticable after the cam swap, but right now I havent felt any difference.
I think the highest I've ever had my bike is 4000feet up from where I normally ride around Sea level.
He did his data testing in 60-70 degree weather.
He also said it really only made a difference
In slow moving traffic like 35 mph.
Other than that it made no difference than
A stock non- Fan oil cooler.
He never really gave anymore data after that.
oh well, the information is worth what you paid for it so do with it what you will..here's some information that will really blow your mind..Harley has been aware their motorcycle engines run hot for many decades, and crazy enough after millions and millions of them over tens of millions of miles they aren't littering the highways with vultures circling over them !! relax, enjoy, and ride more, Webb Out
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.
..maybe I should post that in the TC or M8 ? thread
