Left Column

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I found this idea while looking for info about piston design. Has anyone heard or tried this? It is the idea of machining a small groove into the cylinder head at the squish pads from the combustion chamber to the cylinder wall. Usually one or two grooves that point toward the spark plug. This is to provide better ignition of the fuel in the squish band during the ignition stroke. And to create turbulance in the combustion chamber for better mixing and complete burn while also helping to remove exhaust from these areas during the exhaust stroke.

The performance result is less fuel used, lower temps, noticeable reduction of knocking/pinging, smooth idle and more low end torque (when lugging the engine at low rpm).

There were pictures of the cylinder head's carbon build up pattern before and after the mod. The afters are amazingly clean and even. Drag racers seem to using this on their 10 sec. muscle cars.

I may give this a try while I have my head off. Our squish pad area is relatively small, but mine were covered with carbon. The piston's carbon build up fallowed the pattern of these areas too. It was exactly what the site's theory describes as the issue.

you can find more info by searching squish grooves or somender Singh (the guy that patented the idea, but shares how to diy). Turbobricks.com and mpgresearch.com have a few threads with pics as well.

I know that this is likely to be flamed, so please leave it alone if you don't have anything constructive to contribute. Especially if you don't know what squish or quench area is.