Author Topic: Dolmar 7900 piston choices  (Read 9982 times)

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Offline blsnelling

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Re: Dolmar 7900 piston choices
« on: May 10, 2011, 04:43:21 pm »
I looked at a lot of pistons, including the ones you mentioned.  None of those made the list I kept for one reason or another.  Foran OEM 7900 jug, I came up with a 272 piston which should require about a .174" spacer under the cylinder.  If a 13mm wrist pin could be used, a 281 could be used with only a .095" spacer.

For the 7900BB, I only found the 288 piston, which has a 13mm wrist pin and would require a .095" spacer.

I don't recall if my calculations took into account for a popup or not.  The main thing I was looking for was increased skirt width.  I've not tried any of these combinations yet though.

 

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