Subject: RE: Leak Down and Compression Numbers
Author: Greg Bender
Date: May 2, 2005, 6:59 PM
Post ID: 1718801775
Just got me thinking...worrying more than anything. Could I have
installed Eldo pistons in my Ambo? The diameter is the same, but isn't
the wrist pin located closer to the top of the Eldo piston than on the
Ambo piston? That would certainly lower compression. Did I install three
rings or four? Hmmmm...I wish I would have known more than I did at the
time. :>
Out to the garage to check my stash...find the box that my rings came in
(times like these I'm glad I'm a packrat!). It is a set made by Deves
and is number MC-121. A quick jaunt over to their website
(http://www.deves.com/devesrings/cycles_MOTO_GUZZI.html) confirms that
MC-121 is for the Ambo/V7 Special. Although not a certainty, I'm pretty
confident I have the right stuff in there now.
I suppose my valve timing could be slightly off...causing lower
compression? But I did set it - and double checked it - when my camshaft
broke. Hmmmmm....
Patrick Hayes wrote:
Greg Bender wrote:
Do you know the history of this motor? Years ago, we used to buy thicker base gaskets or stack two base gaskets to reduce compression on pinging motors with bad '80's gasoline. Any suspicion of that here? Patrick Hayes Fremont CA |
Regards,
Greg Bender
1971 Ambassador
2000 Quota
http://www.thisoldtractor.com/gtbender
Florida MGNOC website
http://www.thisoldtractor.com/fl_mgnoc
Minnesota MGNOC website
http://www.thisoldtractor.com/mn_mgnoc