Here is an interesting case study in rebuilding a tired VW sandrail engine back to its original specification and then tuning it on the dyno for maximum power. When we disassembled the VW-based engine we discovered that the case was beat up by the stock non-counterweighted crank. The crank was replaced with a Scat C/W crank. The cases were rebuilt by Rimco and all new bearings, gaskets, etc. were used. The 94-mm pistons and cylinders were renewed and the trashed heads rebuilt back to stock. During the dyno tuning the carburetor venturis were reduced to 32-mm from 34-mm and the jetting changed appropriately. The result was just what the owner wanted: a broad torque curve with decent top-end power. This engine wasn't designed as an all-out horsepower monster, but rather a reliable and torquey engine to power the family sandrail. 

Power after: 97.1-hp @ 4,900, 111.9 lb/ft @ 4,000
Power before: 76.8-hp @ 4,600, 102.8 lb/ft @ 3,500

Type: VW Type 1 1914-cc sandrail engine
Bore: 94-mm
Stroke: 69-mm
Compression Ratio: 8:1
Cylinder heads: Stock VW dual port
Camshafts: Elgin W100
Induction: Twin Dellorto 2-barrel carburetors
Exhaust: 4-1
Ignition: Bosch 009 distributor/coil