More info on the Singh grooves can be found here..............
Somender Singh grooves in a Geo Metro!
SOMENDER-SINGH.com - Home
I have not performed that mod on the extra head yet since I am still waiting for the port and polish job to be finished. I did update my fuel log since the cam and gear swap and noticed almost 2 MPG increase, but this was only one tank.
I am also finally starting on my headlamp covers..............
I also removed the Airtabs. They really did nothing for fuel economy, so I got rid of them. I like the natural lines of these cars anyway.