Ribbed for her pleasure: Water Jacket Mod
Has anyone else bothered to do this? Is it really worth the effort? The housing is this picture was not even complete yet, and had already consumed a few hours of my time. Still hoping some of the big boys will chime in with some big secrets!
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It was done to mine. I can't tell if it helped but, it sure doesn't seem to have hurt.
May I use your photo on my web site to illustrate what the mod looks like? Mike |
Hey Exit,
How does ribbing the water jacket help? Does it create more surface area or something like that? Later --Tommy |
Yes, it increases surface are to assist heat transfer out of the housing. It is usually only done on the combustion side, to eliminate hot-spots that lead to detonation. I put extra effort into the spark plug area. I still feel that I will never know if it actually helps. When the engine fails, nothing helps -- but I make every effort to avoid it!
Mike: feel free to use the picture, just give me a link or credits. I have the full size image if you want, and some others. Email me, and I'll attach them. |
How'd you do that? With a Dremel and a small cutoff wheel or something?
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After trying every dremel attachment known to all of mankind, I finally stumbled onto the perfect bit. It looks like a 1cm saw blade on the end of a shaft. One blade lasts about long enough for one housing, and you have to clean the aluminum from the teeth frequently. Using a medium speed versus a high speed helps avoid clogging also. I use this for all of the the broad, flat areas. Next I use a small tungsten carbide ball-tipped cutter (1/8" perhaps?) to get into the corners, and to do some fancy work around the spark plugs. It takes about 2 hours per housing. Fun. Wal-Mart (believe it or not) has an excellent selection of tips, followed by Lowes. Strangely, both stores do not carry the same stock -- so visit both for the most options!
Here is a simple representation of how surface area is increased: Section of original housing surface , unit of 2L: _ _ ..... Modified housing surface, width of 2L, depth of 1L _ ..|_| Thus, if your cuts are L deep, and spaced L apart, you will exactly double the surface in the treated area. Deeper cuts could result in more area, but would be more time consuming. Maybe an M.E. could study this for a senior design project to see if the actual flux out of the housing is increased under actual operating conditions? (Hint, hint!) |
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