It is different for different engines and running conditions. We use Nova C5TGC or C5TCH; for Novarossi 353, 3SCT or Flash 12 engines, but most of the guys around here use Nova C6TGC or C6TGH turbo plugs. Many around here believe that ODonnell plugs are better (and much cheaper), and we have also used them at times. Use ODonnell 77 to replace the Nova 5. or ODonnell 99 instead of the Nova 6. We use O.S. No 8 glow plugs for a Nova CX12 (non turbo plug head).

The information in the file attachment should help. Please note that C (calda) and H (hot) is the same in Novarossi turbo plugs.

Kindest regards,
Lars