Engines

I have been looking at engines again, set up some matrices to look at bore, stroke and cc. Below is a matrix of bore, stroke (mm) and displacement in cc of all the VW engines I know of.

	Stroke [mm]
Bore [mm]	69	78.4	82	84	86	90
85.5	1585	1801	1883	1929	1975	2067
88	1679	1907	1995	2044	2092	2190
90	1756	1995	2087	2138	2188	2290
90.5	1775	2017	2110	2161	2213	2316
92	1835	2085	2180	2234	2287	2393
94	1915	2176	2276	2332	2387	2498
97	2040	2317	2424	2483	2542	2660

Then I substituted the displacement for engines

Here GP = Great Planes, H = Hummel, S = Sauer, L = Limbach and R = Revmaster. Surely the Sauer 2400 and the Revmaster 2300 with larger bore and larger stroke is more powerful than the AeroVee. The AeroVee is the smallest engine of the bunch. There is more to an engine than displacement, but larger bore and stroke more often than not means more HP and more torque.

The Limbachs and Sauers with 97 mm bore have a different casing than the others (the Sauer 2700 is no longer available, only the 2500). They use the "Wasserboxer" casing. This casing is originally made for 1900cc and 2100cc displacement, and obviously can accept at least 2700cc (97 mm bore and 90 mm stroke). The casing itself is not water cooled, only the cylinders and the top, but the casing is much stronger built than the air cooled casing. It is originally made of aluminum (I think), at least the Sauer and Limbachs are aluminum, but they make their own cases. Limbachs highest powered engines have water cooled top; The 100 HP L 2400 DFI/EFI, and the turbo engines, the 130 HP L2400 DT and the 160 hp L2400 DTX. Below are drawings of the air cooled cooled casing and the Wasserboxer casing.