Yeah, that's the big question. Half-VW's come in all iterations from plans to cut down your own 4-cyl engine to bolt-together kits. Which one you get depends on your skill with the necessary machine tools (and your access to them).How much machining can you do and how much do you have to buy?
Don't remember the size, but it was a strong engine. You can get some info here www.betterhalfvw.comhow much HP did you get with it?
do you still have the plans?
This might work well with the full case I mentioned above, because the full case holds more oil, and also disipates more heat.revkev6 said:It's definitely not a cheap option but has anyone ever built a 84mm stroke by 101.6mm bore half vw?? buy a race engine to use as a base for an aircraft engine? you'd get somewhere in the neighborhood of 1350+cc out of a two cylinder. put some shims on the barrels to drop compression and a suitable camshaft. based on other two cylinder manufacturer hp claims (hp per cube) you would be looking at 45hp from a half vw. 90hp if you kept it whole! (these engines made ~300hp at 7500rpm in race trim) they can be had with all kinds of bearing options as well. type 4 mains, sbc rods etc.