After a first drive I'd say it needs more power but perhaps taking care of standard things will help. Since I'm a newbie do y'all have some articles to direct me to?
Did you hear that guys? "IT NEEDS MORE POWER!"
Well, now that I've settled down, I'm thinking "how could I have missed this? Must have been the rum...
You know it's a 1915 (which is pretty good in itself), with dual carbs (do you know what the previous owner took off when he put these carbs on it? what carbs are on it now? I have so many questions...) and twin tip hot dog exhaust, so I'm guessing it has stock heads and a mild (Engle W100 or W110 or similar) cam, so 90 hp or so. This will be a great engine to learn how to maintain and "become one with", so driving the car for the upcoming summer season as you learn how to change oil, adjust rockers, install and adjust points, set ignition timing, replace spark plugs and adjust carburetors (have I missed anything?) bring out the engine's true potential, give you the time to get used to (and bond with- a very important step here!) the car, learn the ins/outs of VW aircooled performance (I'll give you something to read when I'm done), and decide if the car could use any "modifications" (we call it THE MADNESS for a reason!).
Should you decide (after driving the car for a while) your baby needs more power (how I love those 3 words! ) the logical progression is to build a 21, 22 or 2300cc engine. A longer stroke crankshaft with aftermarket rods and light flywheel, ported big valve heads, different exhaust, slightly more radical cam (and higher ratio rockers) to get all the power out of the heads that you paid for, some small Webers, Dellorto's or HPMX's (which it looks like you may already have) and an easy to care for, revs to 6,000prm with a reliable 140-160 hp is possible. Any of the guys here with more than 2 liter engines will tell you, having that much power on tap makes these things really fun! This stage will not come cheap though- budget 5-$6,000.
You can go higher- 180 to over 200 hp is certainly attainable through carburetors, but expect to pay another 2-$4,000, and depending on what you build and how far up the hp ladder you go it may require more maintenance and may no longer be the jump into any time, drive any where car it would be with just a bit less power.
Have a good read- Yoda out (for now, but back will I be!)
http://www.aircooled.net/vw-performance-engines/
http://www.aircooled.net/vw-technical-articles/
https://www.cbperformance.com/...hResults.asp?Cat=144