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CVO Technical => Twin Cam => Topic started by: Cerdo on May 15, 2007, 06:58:09 PM
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Stealer is going to have my jugs off for a warranty oil leak. Do you guys think I should spring for the diamond cut jugs while they are off????? Are they worth the $$$$ Do they cool better????? Any head work needed at this time while its apart. I'm already running the D&D Fatcat 2 into 1 exhaust, big sucker, zipperes ECM and auto tune module. Bike runs great!!! Respect your ideas and / or just looking for an excuse to spend more $$$$$$$$$$ LOL!
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Talk to Twolane. He had it done to his bike and it turned out very nice.
Bigdog
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Stealer is going to have my jugs off for a warranty oil leak. Do you guys think I should spring for the diamond cut jugs while they are off????? Are they worth the $$$$ Do they cool better????? Any head work needed at this time while its apart. I'm already running the D&D Fatcat 2 into 1 exhaust, big sucker, zipperes ECM and auto tune module. Bike runs great!!! Respect your ideas and / or just looking for an excuse to spend more $$$$$$$$$$ LOL!
It would be great tofeel comfortable with the work getting done and having the labor covered, my concern at this point would be if there is further warranty work that comes up related to the cylinders etc. and it got turned down because of the mods.
If you aren't concerned with the warranty on the engine relative to he cylinders and heads then I'd asy go for it, it looks great and as Bigdog points out Twolane is really happy with his mods. View here Don's Diamond Cut project (http://www.cvoharley.com/smf/index.php?topic=8183.0)
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Had mine done when I did the Zippers build. It looks great. I would not worry about warranty issues.
Be Safe
THE DAWG
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We have them done for customer on a normal basis. Sorry but after testing several dozen sets we have not seen any lower temps. It really is a bling factor. One thing you do need to keep in mind is that it is best done before cylinder boring. As we have seen the cylinder get out of round from the cutting.
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I think that their claim (and they have a patent on it) is not that they run cooler, but that they cool faster. So, if I understand it correctly, if they run hot they will get cool faster when the air begins moving around them again.
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I like helping people spend their money. Go for it and post a picture.
Rhino
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We have them done for customer on a normal basis. Sorry but after testing several dozen sets we have not seen any lower temps. It really is a bling factor. One thing you do need to keep in mind is that it is best done before cylinder boring. As we have seen the cylinder get out of round from the cutting.
could you elaborate further on your experience regarding the out of round cylinder(s) from the diamond cutting? ??? thanks, spyder
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I think that their claim (and they have a patent on it) is not that they run cooler, but that they cool faster. So, if I understand it correctly, if they run hot they will get cool faster when the air begins moving around them again.
from diamond heads website: http://www.diamond-heads.com/companyhistory.html
irregular surface area creates more turbulence while moving thus creating more air fin contact which equal greater cooling plus increased surface area allows faster cooling as well. ( according to them) John
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I've heard that the powdercoat that frequently goes with the diamond cutting was responsible for the out of round cylinders , but it could be that both effect it. Definetly looks cool
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I've heard that the powdercoat that frequently goes with the diamond cutting was responsible for the out of round cylinders , but it could be that both effect it. Definetly looks cool
BINGO WE HAVE A WINNER!!!!!
It is not the actual powder coating but the heating of the cylinders that causes the problem.
Be Safe
THE DAWG
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Hey DAWG, do they experience this problem w/ the initial powdercoating while building the motors at the factory? :-\ spyder
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ahem , yep the heat cycle that sets the powder coat would have been the more accurate way to phrase that . When I was looking at doing it , I was cautioned by the builder to have it done then bore the cylinders.
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I bought some new 95" jugs and SE Heads from Chicago HD for my wife's Fatboy and sent them directly to Las Vegas for Diamond Cut, absolutely no problems, she loves the complements.
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Hey DAWG, do they experience this problem w/ the initial powdercoating while building the motors at the factory? :-\ spyder
SPYDER I also asked the same question. It seems the factory DOES NOT use a heat setting as high as most powder coaters use. I think it is a time thing but not completely sure.
Be Safe
THE DAWG
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I'm having my top end off due to leaks as well. Will the Diamond Cut alone cause any warpage as described above? will it mess up the stock Flat Black factory Powdercoat? I assume the heads must come apart? Should anything be done to the heads (hot set-up tricks) while they're out? I'm probably doing the 251 cams (no gear drive in this ticking time bomb) and 50 mm SE Throttlebody w/larger injectors. Leaving the stock pistons. Don't want higher compression with this potential grenade! I'll leave the stock oil pump and cam plate for now. I like the stock, non-adjustable pushrods, so those will remain. What about lifters. If the stock are OK, I'd prefer to leave as much stock chit in this thing as possible for my future battle with the MoCo, which seems inevitable! Measuring crank runout first, and from what I hear, I have no reason to be optimistic about that either! Just hoping it's reasonable at this point.
With just a mild hop-up in mind, what are any other must-haves based on what I've stated here? C'mon experts, now I'm finally serious about this. Motor's coming apart next month. Help a brotha out!
Hoist! 8)
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SPYDER I also asked the same question. It seems the factory DOES NOT use a heat setting as high as most powder coaters use. I think it is a time thing but not completely sure.
Be Safe
THE DAWG
Mike, I think you and I spoke about this once previously. But it's been long enough ago I wouldn't swear to it.
There was a concern (voiced by the machinist at Zippers that worked on the jugs) that many powder coaters bake at too high a temp. Problems can result.
Can't speak to any others. But everyone involved in my work seemed of the opinion that Sumax knew what they were doing here and would not be a hazard. The pistons fit the jugs just fine so, apparently, all was well on that job. Sumax was slower than 49cc scooter carrying me and Dawg together. But their work was apparently top notch both in terms of visual appearance and in familiarity with the requirements of what they were working on.