David Schwarze wrote:
> 
> Dave Kautz writes:
> > 
> > Stock bore and strokes for type IV engines are:
> > 
> >               1700cc    90 x 66
> >               1800cc    93 x 66
> >               2000cc    94 x 71
> 			  ^^
> 			I stand corrected.
> >               
> >Heads can be interchanged between 1800s and 2000s (1800 valves are bigger) but 
> >1700 heads only fit 1700s. 
> 
> Nope.  I took a set of heads from a 1700 in the junkyard and bolted them
> right down on my 1800 engine.  I'm pretty sure they had not been flycut.
> 
> > 			So, to make a displacement jump from a 1700 you have
> > to change everything but the case to get to two liters, and change barrels, 
> > pistons and heads to get to 1800 (the best of the bunch, in my opinion).
> 
> Again, you don't have to change heads to go from 1.7 to 1.8.  The most you
> will have to do is have the heads flycut, but I don't think so.  I also
> am almost positive that you can make a 1.8 into a 2-liter by using 2 liter
> pistons, barrels, rods, and crank.  You can even cut down the old 1.8 liter
> crank to a 2 liter one.  My source for this is "How to rebuild your Air-
> Cooled VW Engine", and numerous discussions with machine-shop guys.
> 

My experience on this has been that 1700 heads don't fit on an 1800 engine.
Replacing one of the heads on my `74 (1.8) I was accidentally sold a 1.7l
head and it definitely didn't fit on the barrels of my bus; I tried it and it
was too small.  Now how's that for a descrepency in the data?  :)

John Ritchie
(`74 bus)