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Old 04-12-2018, 09:13 AM
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Default Adapting a turbo head to an old engine

I mentioned this in another thread, but I wanted to put a few different questions out there to get a little more information. I have a Novarossi BX21 Paris engine that I’d like to convert to use Turbo plugs. I looked through all of the current engines Nova makes and not a single one of them has a 16.66mm bore. So I looked through the list of current production Engines for one with a bigger bore than my BX. I would then shave larger head button down to fit the smaller 16.66mm bore. Can anyone tell me what the screw spacing is on the Legend .25 or the Roma .25 or both and also the depth the head button protrudes into the bore?

The part number head I’m looking at is PN28000-25. It will be far cheaper to modify this head than having a new one made - provided the depth of the button is the same or deeper than the factory head.

Last edited by RCTecher12; 02-04-2019 at 03:45 AM.
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