MVVS Diesel

[Craig Campbell]

I have 2 MVVS Glo 2.5cc motors and thought I had purchased 2 diesel heads but they are missing the intermediate piston. Has anyone got a picture or drawing that I could machine some up from.

[qaz049]

I have 2 MVVS Glo 2.5cc motors and thought I had purchased 2 diesel heads but they are missing the intermediate piston. Has anyone got a picture or drawing that I could machine some up from.

The MVVS Glow and diesel have different liners IIRC. Fortunately the diesel push/pull head from a Parra 15D is almost a straight fit.

They're only about Euro 15 from Alberto Parra.

I have a pic of a modified motor somewhere I'll see if I can find it.

Otherwise here's some ideas for home made diesel heads.



Ray

[ash]

Fortunately the diesel push/pull head from a Parra 15D is almost a straight fit.

Thanks for that tip. More reasons to send Senor Parra some money.

What is the required adjustment?

[qaz049]

Thanks for that tip. More reasons to send Senor Parra some money.

What is the required adjustment?

There are a few MVVS 2.5 Parra Diesels around. The normal ABC p/l is usually replaced by a generic Rossi mk2 set with diesel fits.

Either Iron/Steel or ABC work well. The Parra head has to be individually fitted and a rod that suits the p/l may be necessary. The one in the pics has a standard MVVS rod IIRC.

The top of the liner may need a slight skim so the push/pull head goes deep enough.

The bottom of the MVVS cylinder fin assembly may need a skim as well to get a suitable exhaust duration.

A Fora 15 Diesel "Pioneer" is more powerful and cheaper!

Ray

[ash]

Thanks Ray. I might just leave mine as a glow, then. I only got it as a nostalgia piece anyway. A Fora or Parra is always going to be a better option in the air as you say.

[Craig Campbell]

Thanks all for the help I will see if I can get some parra parts.