In a message dated Thu, 4 Jan 2001  8:38:55 AM Eastern Standard Time,
"Greenamyer, William L" <William.Greenamyer@WEST.BOEING.COM> writes:

<< Learned something new from my garage mechanic yesterday.  He talked about a
BIG BORE kit that was used to convert the 1.9 to a 2.1.  From all of the
talk on the list, this would seem to create problems in a lot of areas, most
of which would be the ability of the cooling system to handle the extra heat
(since the engine doesn't have an oil cooler).  I would like to get further
inputs on this topic, especially about any BIG BORE kits that are used for
converting a 1.9 to a 2.1.

William
 >>

The bore on the 1.9L and 2.1L are the same -- the extra displacement of the
2.1 comes from the stoke.  I've heard rumblings of big bore kits that will
increase the displacement to 2.5L but have never seen one or heard of anybody
that actually has used one.  I suspect any such kit would be very expensive
since there isn't much demand.  While you might be able to get a little more
power out of a wbx going this route to have anything remotely reliable you
would have to out-Lilley Robert with full balancing, coatings, etc..

Chuck
'85 Wolfsburg Westy