Grooves in the squish area of the combustion chamber
https://www.jeremiahsviolins.com/grooves.htm
Anyone done this? I'm curious. I would love to do this but my car is too nice. |
Ah, I posted about this way back when when it was new, who knows, not me. Someone more clever will have to come along and see. I believe Larry is having this done on his saturn.
However, it might be worth noting that Hondas don't really have quench spaces, at least not D, B, H, or F series Hondas. I haven't seen a K or L taken apart that I know of but I don't they changed their basic head casting. |
This person is a regular contributor at teamswift in the FE forum. I haven't talked to him about this though. What's the supposed mechanism that helps FE?
He mentions the grooves helped reduce ping, which he got by going with a shaved head / increased compression ratio. But, isn't taking material out of the combustion chamber simply reducing the compression ratio again? I admit this one's beyond me. |
the idea of the grooves I think is they help to chanal the flame to the outer edges to help with a faster more compleat burn, and altho the groves will help to reduce compression I doubt, unless he bearly touched the head when he shaved it, that those tiny notches have no way of making up that much volume.
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Dude, I'd throw a few bucks your way just to have a reliable test done on this ish.
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...you can also find links to other sites...a lot of people doing the groove thing with some good results. |
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I'd throw 20 bucks at it. Hell, if hondas had quench space I would've done this a while back. Mehbe this is something I can try on my possible geo metro before I dump the diesel in there, :p
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Quench
I thought a combustion chamber used the "quench" area to control detonation. I would think grinding a groove to allow the flame front to travel into the quench area would be detrimental to the control of detonation. Or would these channels allow gases caught in the quench area to be forced back into the center of the chamber and create more turbulence (swirl) for a more complete burn?
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