OPS got an Engine called something like Speed or so.
Its the latest one and it got good Power. In Italy OPS is often used in the Classic Races with good results. How I know, OPS is distributed by mantuamodels in Italy.
For the 1/8th Race Car for serious competition you have to choose other brands. OPS how it seems is not interested to enter this sector.
OPS was leader till the 90ties. Than Novarossi take the lead till now on.
The OPS 93 was a very bad engine distributed by BMT at the Time. A lot of issues with Material and Power. I remember the european cahmpionship in pescara Italy where a lot of BMT Drivers retired from the race because of bad material from the car and the BMT OPS engines.
The best OPS engines was the OPS Pro in the 80ties and the Super Pro as well the Mondial Brand from Serpent.
Very fast engines at this time.