Trundle,

can you give us some comments about the Sport-o-matic? Was before my time...
Especially your personal opinion would be appreciated - since it didn't have to much success on the market!


Turbolite,

Koro (www.koro.de) for example increases the GT3 engine to as much as 4.8 litres but they use several patented items they have personally developed in the past. According to their own information they use patented crankshafts for example.
Increasement in their 4litre engine is achieved by increasing bore alone - not too many information about their credibility. They seem to be very serious with their achievements though, done a lot of work for various car manufacturers and racing teams!