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Post by StewRoss on Feb 5, 2008 16:55:01 GMT -5
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chase
Junior Member
Posts: 35
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Post by chase on Feb 5, 2008 17:09:46 GMT -5
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Post by StewRoss on Feb 5, 2008 19:17:30 GMT -5
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Post by davewfc603 on Feb 6, 2008 0:53:50 GMT -5
I have a question that I have debated. Do you or can you paint the (whole) engine & hell while you are at it the cases. I glass beaded the engine & polished(buffed) the cases. I was thinking of painting with VHT high temp clear (It a car/truck engine paint). Some have suggested it will hurt the heat release of the engine, and what is done at the factory is a much thinner coating and is done during the cleaning /rinse process. If I had the mental capibility to post a picture I would., but that part of my brain is apparently dead. Yes your engine looks great, another reason not to send my pictures, Dave
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Post by bigshingle on Feb 6, 2008 10:37:01 GMT -5
Wow. Mine didn't look that good brand new.
Davewfc603, I'm going through that right now.
I cleverly had the cylinder bored and then decided to have it soda blasted. Wish I'd done it the other way around.
The guy who's doing it seems to know his business and he recommended powder coating it, either black or clear. He says there doesn't have to be a heat problem with powder coating. He's done a lots and so far has never had any problem.
Still, judging from the color of the pipes, SRs run hot, so I'm going to go with bare aluminum rather than take a chance on being the guy's first problem.
Having just gone through the pain of getting chipped, ratty-looking paint off, I don't want to put any paint back on.
As for clear paint and clear powder coat, I would be concerned about them standing up to UV.
Which brings up a question I was going to post anyway: Originally, before soda-blasting the cylinder, we were going to protect the barrel with a silicon plug.
I just talked to the shop, and instead they heated the cylinder to 400 F and pulled the barrel out. Hmmm... I wasn't expecting that.
Has anybody ever done that?
What are the chances of getting the barrel back in right?
Am I going to be in the market for a new cylinder? (that I'll have to have bored since I've already got the larger piston and rings.)
I don't know what people who don't have an SR do to fill up their day.
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Post by StewRoss on Feb 6, 2008 15:01:32 GMT -5
Hi, Yes that can be a bit of a puzzle. That engine despite the rough look of the 'before' pic, had pretty good case paint under all of the grime and rubbish. I feel that the cylinder and barrel should be left bare alloy as I have. Just look after them during life by spraying with a protective film etc. if needed. The cases are more of a quandry, as they can be more difficult to access in the frame once fitted. My engine from the New Cafe Racer is something I have yet to decide about. I had the cases etc. hydroblasted a while back and they're sitting there awaiting assembly. I feel that the bare alloy is better for heat dissipation, especially on a worked over engine such as this one is. But you need to balance that off against possible corrosion down the track on a bike that is supposed to look good as well. See pics: img91.imageshack.us/my.php?image=eng2ux0.jpgimg91.imageshack.us/my.php?image=cases3tj3.jpgI am still not 100% sure what I'll do.  I'll probably leave them bare... Carl indicated to me a while back that there was a spray product that protected the bare alloy but I have forgotten the name of it. Carl? It isn't a problem getting someone who is used to doing sleeve changes to replace the cylinder liner again by the way. Just using heat correctly....an amateur can end up with the liner stuck part way.... There are also aftermarket sleeves available should you damage yours in service. These come in oversize as well...  SR  |
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Post by milkman on Feb 7, 2008 3:42:27 GMT -5
Well I can't talk for my SR yet, but a fella I was speaking to had his barrels powder coated on an airhead beemer and found the bike was running hotter, as opposed to when he had just painted them with high temp paint, which he siad showed no major difference.
Of course thouse cylinders stick out the side in the breeze, so if heat dissapation was an issue on the airhead, I think it might be slightly worse on the SR
Having seen the finsih on Stew's motor in the flesh, i'd be more than happy to leave it at the blasted stage, and just hit it with some WD40 when I wasn't out and about
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Post by StewRoss on Feb 7, 2008 6:52:21 GMT -5
I'll have a talk to Carl about the spray stuff he was talking about. I know you can get stuff called LPS-3 in aviation circles, we used to use it to corrosion proof the helicopters, but it is a bit 'waxy' and would pickup dirt etc. SR |
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I'll probably leave them bare...