GR Racing tuned OS12TZ

Engine tuners seem to be a dime a dozen these days with anyone who can use a dremel and who has ever taken their engine apart claiming to be a motor maestro. That said, i was impressed with work done by GR Racing, a Korean tuner that takes his dremel and know how to many different types of engines including this OS12TZ 3-port. This engine has had tear dropping done to the liner, ceramic main bearing, crankshaft lightened and modified, crankcase work and even has a job done on the combustion chamber, definitely looks good, the proof of course is on the track.

Check out all the work done in the full picture set on RC Forum who have the scoop.

Source: RC Forum [rcforum.co.kr]