:eekdance:
some people need to be put down…
i no longer want to bring a child into this world
OMG, i never thought of that, BRB
wtf? lol if you were tearing the engine down far enough to do that kind of work (and especially having head work done) why not shave the head a little and use a thinner gasket?
"I’m with Braineack. I really want to see you try this, with before & after dyno plots, along with pictures of the damage after one or more of the pistons fails. "
HAHA
people are so dumb
Actually, there may be some truth in this after all.
While searching for evidence to rebut your idea, I actually ran across an old article where something similar was successfully done by a race team in some spec series a while back. I accidentally closed the browser window and I can’t seem to locate the article again (one complaint against Chrome- the History function never seems to work properly for me) but the gist of it was this:
The team in question used, of all things, US half-dollar coins. Apparently they used a small quantity of two part metal epoxy (ie: JB Weld) to attach one coin to the dished area of each piston, and then a second coin atop that. The use of epoxy apparently satisfied the problem of heat transfer, since unlike welding it provided a continuous bond across the face of the coin and did not create meaningful thermal isolation between the parts. Currency was chosen as it tends to be surprisingly consistent in terms of weight and volume, and as the amount of epoxy was both quite minimal and of course controlled by the fact that it was squished out as the coins were pressed under a weight during the curing process, they did not encounter balance problems. The copper-clad nickel construction of a 50 cent piece is apparently quite resistant to both heat and pressure in the combustion process, and the coins apparently suffered no damage during the time that they were run.
The team ran in this configuration for a nearly a full season, collecting several wins until they were finally found out during a protest. They successfully argued that they had not violated the rules, since the pistons were stock and had not been machined, nor had the head, deck, etc been machined beyond allowable limits. They were allowed to retain their points, though of course the rules were updated.
I wiki’d the specs on US coinage, and sure enough, the 50 cent piece is the largest (in terms of mass) US coin in common circulation. The weight is specified at a paltry 11.34 g, and the dimensions work out to a volume of 1.6cc. Thus, two 50 cent coins stacked would displace about 3.2cc.
Assuming an otherwise stock 1.6 engine, this would take you from 9.4:1 to exactly 10:1, which is actually a pretty good result considering the total investment of $4, as compared for $580 (plus machining) for a set of Weiscos.
This isn’t what I expected to find, but it makes me believe that the fundamental idea may have merit.
pretty wild if it’s true
hmmm, if I had a crappy honda I would pull the head and try it
Civicjim will have one for sale CHEAP!!!
lol
I would love to take part in such an experiment.
ha
you could do this, or, if your like me and dont want to worry about any interference or cam timing changes due to the shaved head, just weld the head to reduce the combustion chamber volume. Why you would add ANY rotating mass or weld or glue somthing to the pistons is beyond me
instead of welding, try a self tapping screw…