I saw this post on one of the yahoo groups that I monitor, and thought it was applicable:

“A VW Type 1 1835 engine can be built as follows:  Scat C25 cam, 041 performance heads with 40mm intake and 35mm exhaust, 7.5 CR , 300CFM carb, four tube into one headers and otherwise blueprinted should give the following HP.

2000 RPM  38 HP -  99 lbs of TQ
2500 RPM  48 HP – 101 lbs of TQ
3000 RPM  61 HP  – 106 lbs of TQ
3500 RPM  78 HP  – 117 lbs of TQ

Give or take a couple horses depending on your assembly accuracy . You will also need a good disturber or mag in the dist. hole. The flywheel in mag isn’t as good, no spark advance.

Now for a little of my background, I raced SCCA Formula VW in the late 70 and early 80. If you don’t know what that is it’s a 1200cc VW that we could get a little over 50HP out of in mostly stock form, that would send me down the straight at 7000 RPM and about 125 MPH. In addition to that I have been building VW for Dune Buggy’s and Baha bugs for 40 years.

I also had a 1835 in a Volksplane in the 90′s swinging Sterba 54-34 prop, takeoff was about 3300 and cruse at 2900-3000 and 90-95 mph. It would take off in 200 -300 feet. Later I put a Tennessee prop same size with about the same numbers.”