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)