QUOTE(patrick3000 @ Mar 24 2014, 05:26 PM)
Tell us more about the 1911 option, details please.
There are tables, calculators, HP graphs all over the web and many posts about the conversion, let's see if I can remember and add something new to the conversation:
1.7 liter is 1670-ish cc? has 66mm crank and 90 mm pistons (66 x 90)
1.8 liter is 1756 cc (66 x 93) again crank x pistons
2.0 liter is 1980-ish cc (71 x 93?)
1911 cc conversion is (66 x 96)
2056 cc conversion is (71 x 96)
The 71mm crank has smaller rod journals and they are offset. So changing cranks increases cost cause you need new rods.
My thought was if you are buying new pistons and cylinders anyway, go ahead and get 96mm. As Dave said the 1.7 heads will probably need to be cut for those to fit, but you should get your heads repaired anyway, freshen up the valves and other goodies on the heads.
As a side note the 2.0 valves are bigger and have the plugs in a different place, so your tins will need replacing or at least some welding and hole cutting.
I used the "while your in there plan" on my heads and had the 1.8 heads ported for 2.0 sized valves. No need to change my tins that way.
I think that is it... But don't forget to replace the oil galley plugs!