Is Chrome a good upgrade?

Discussion in '2-Stroke Engines' started by Tyler6357, Mar 23, 2012.

  1. Tyler6357

    Tyler6357 Member

    Hey everyone. I'm still shopping for a new China Girl and was wondering how much of an upgrade Chrome is. I saw this Chrome one from BGF on ebay and thought it seemed like a good deal. It says needle bearing engine only ( no other parts). Does this mean that it doesn't have 203 Crank bearings or are those pretty much standard on most China Girls today? Anyway, my main question: is Chrome good to have? is it better than black? I saw this black one from BGF also. Do these seem too cheap to be real?
     

  2. Al.Fisherman

    Al.Fisherman Active Member

    Already answered..... You won't get any different responses here.
     
  3. geebt48cc

    geebt48cc Member

  4. jeffuehrer

    jeffuehrer Member

    Chrome all the way! Increase visibility! Reflect light! Look like a cylon! No brainer!

    "If you haven't fallen off your MB you obviously haven't been ridin' it!"
     
  5. Al.Fisherman

    Al.Fisherman Active Member

    And gets HOT!
     
  6. geebt48cc

    geebt48cc Member

    Amen again Ron!!!!!!!!!!!!!!!!!!!! (I wish I had went with natural finish............................)
     
  7. Al.Fisherman

    Al.Fisherman Active Member

    Still it's a lot of heat between your legs :>)
     
  8. Tyler6357

    Tyler6357 Member

    Ron
    Yeah, I know, I just thought I would post this at both forums to see if I got any differerent answers. :) Like I said at the other forum. If heat is a problem with chrome, I certainly won't get a chrome one. I live in Southern CA and it is sunny and warm most of the year. In the summer it can get over 100 degrees in my town. Heat is a huge concern for me, I want an engine that runs as cool as possible! I guess chrome is out of the question and I don't think I will get the black one either because black traps heat and if they don't run any better than a standard untreated one, why get it? Also I really don't care that much about what my engine looks like. I am most concerned about getting decent crank bearings, needle bearings, NOT bushings, quality piston rings, etc. I don't mind spending a little more for these things but who can you trust? nobody!
     
  9. geebt48cc

    geebt48cc Member

    Tyler,

    If $$ isn't major major, then you need to look into ROCK SOLID ENGINES............ They build some good ones.
     
  10. jeffuehrer

    jeffuehrer Member

    The engine you are referring to is actually "Chrome color" as the description in the auction states. This means it is painted "chrome" and the black one is painted black. The fact that light colors reflect heat and you are in a sunny state I would suggest that the "Chrome" engine would be a better choice.
     
  11. motorpsycho

    motorpsycho Active Member

    actually, black on and engine doesn't make it retain anymore heat than if it were painted red, orange or yellow.
    almost all racing engines are black, some motorcycle engines are black, engines in new cars come painted black with black plastic shrouding.
    the fact that we're talking about an air cooled engine vs. a water cooled engine isn;t much different.
    I've had several air cooled engines that were black and they didn't seem to run any hotter than if they were bare aluminum.
    a black engine won't run any hotter than an engine that's surrounded with plastic shrouding (like on a chain sawe or a weedeater.)
    I got a silver 66 c.c. 2 stroke and painted the cylinder black....it doesn;t run any hotter than my all silver one.
    yeah the "chrome" on these is just chrome paint, which is just silover with a ton of pigment and metallic in it.
     
  12. jeffuehrer

    jeffuehrer Member

    Wear a black t-shirt outside in the sun, then wear a white one. Color matters in everything where light exists (period). You aren't the guy that says angles don't matter either, are you? If I listened to everything you guys said I'd have missed out on nearly 200 miles of riding on a cracked frame. There is a reason these forums are free. Take it from me. Jeff knows.
     
  13. Black, chrome, or natural silver-grey aluminum, it does make a difference. Black will absorb heat from the sun, true. Black also radiates off heat better than any other color, true. Chrome plating or paint will get hotter because it doesn't radiate heat as well. Any paint is a layer of some thickness and acts as an insulator, so will retard heat flow out to the air and the engine will run hotter. There are anodizing processes that will chemically "stain" aluminum black(or other colors) without adding an extra insulating layer of paint. Black anodized aluminum fins on an air cooled engine would be the ideal heat shedding material. There was an experiment with a pair of aluminum blocks left out in the sun and monitored for temp with recording thermometers. One was anodized black, the other chrome plated and polished. The black one quickly heated up, then stabilized, giving off heat as fast as it absorbed it. The chromed one slowly just kept getting hotter, passing the black one and eventually stabilizing at about 100 degrees hotter than the black one. Chrome isn't a good choice. Bare aluminum would be a better choice than any paint.

    The plastic shrouding around most all small fan cooled, air cooled engines is there to guide the fan driven cooling air to more efficiently cool the engine. If you will always have the engine in fairly rapid motion, it might be okay to remove the shrouding, but if the engine will be moving slowly, or motionless at times, even for short periods, it is better to leave it in place. On liquid cooled engines the plastic pieces are there to cover the engine from view and I remove it to better access the engine for maintenence. Every auto manufacturer used to paint their engines a certain color. For instance, Chevy's were a redish orange, Packards a dark green, Fords were green in the Model A days then in the 1950s red, or blue, or black, depending on the engine. Paint on a liquid cooled engine is unimportant as the cooling occur inside the block, though the radiators are usually black or bare aluminum.
     
  14. geebt48cc

    geebt48cc Member

    True, aluminum would be best. Notice that all really full blown experienced MB'er do the natural finish.

    I'm good with my black, but have learned that natural is the better.
     
    Last edited: Mar 25, 2012
  15. motorpsycho

    motorpsycho Active Member

    nope, it wasn't me that said angles don't matter.
    If black is such a bad idea for an engine, you better go tell Harley Davidson, because they've been painting / powdercoating their engines black for YEARS.
    Yamaha, Kawasaki, Honda, and Suzuki have painted their engines black for years as well.
    Black does heat up quick, but as motorbike mike said, it will stabilize the temp and actually give off heat as fast as it absorbs it.
    it's not the sun shingin in it that makes a difference, it's how hot the engine is running due to the air-fuel mix and compression.
    a lean engine, or high compression engine, no matter what color it is will run much hotter than a rich low compression engine.
    true, wearing a black t shirt in the sun is hotter than a white t-shirt, but were talking about temps that MAY only excede 100 degrees.
    (body temp and outside air temp / sun).
    now, do the same thing but jack the temp up to around 250 - 300 degrees, and suddenly a 100 degree drop in temp is a huge amount. black will radiate the internal heat away faster than chrome will.
    also the 100 degree air temp actually helps cool the engine because it would be running at 250 - 300 degrees.
     
  16. HeadSmess

    HeadSmess Well-Known Member

    if black absorbs all colours, how can you have gloss black? :jester:
     
    Last edited: Apr 2, 2012
  17. jeffuehrer

    jeffuehrer Member

    I just put on a "chrome" (it's actually aluminum with a shiny chrome finish on the outside) magneto cover. I like shiny. Shine, shine.
     
  18. vermhot

    vermhot Member

    If you are so worried about the heat ,then paint it all white !! It might be the way to go !!!
     
  19. jeffuehrer

    jeffuehrer Member

    Some like it hot.

    <img src="http://www.justico.com/justiceo/justiceo.gif">
     
  20. JR_MB2012

    JR_MB2012 New Member

    Theory on Chrome

    My basic theory on chrome:

    If it does not move, chrome it.
    If it is an exhaust, chrome it, but watch it for that "blue" that develops where the heat is on.
    If it moves, chrome it unless it is bearings. Then grease the heck out of it.
    Also would recommend using DOT Reflective Tape, especially when riding at night. Between all the chrome and lights, it will make you more visible than a B-52 coming in for a landing.
     
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