The earliest version of the Topo was powered by a Saab V4. Since Jack has built a couple hundred of these little engines, it made perfect sense. It is an extremely compact design, and when it isn't hiding under the hood of a Sonett, it can house some respectable cross-ram Webers.
Cross-ram intake manifold featuring twin Weber DCOE carbs:
Saab V4 mated to Fiat 124 5-spd trans:
More details showing the cross-ram Weber setup:
And along came a twin cam. About this time, Jack took possession of a low-mileage Fiat 2000 Spider that had been smacked in the butt. So after a bit of measuring, deep introspection, Jack decided the little Topo should be powered by a hot rod 2L Twin Cam:
Ultimately, this setup has proven less costly, far easier to make work, and possibly even more powerful given similar carb setups.
SWF WIPER MOTORS--SAME BUT DIFFERENT
5 months ago