702 Dimensions

What if you could take an overhead-valve V-8 engine and add 4 more cylinders to it making it a V12? How cool would that be?
Done! ThunderV12!

Unlike the old fire truck V-12’s that are either flathead designs (Seagraves, Pierce-Arrow) with the exhaust coming out of the top of the engine or 30-degree engine designs (LaFrance, Auburn) that look like a wide straight 6 engine (ugly and built unbalanced like a model T engine), the ThunderV12 engine looks like a long modern overhead-valve V8…but longer.

The width compared to a bigblock Chevy or Ford is the same to slightly narrower depending on valve covers and heads used on the big blocks.
The height of the V12 is around 9″ taller. Nearly all of this additional height is an oil pan. The Y block design of the V12 causes only about 1″ of the crankshaft to show below the block. The V12 oil pan can be shortened substantially if required for clearance. The pan is 10 5/8″ tall. We have built a dry-sump oil pan in-house that is only 2″ tall.

Length. This is what puts the hot in hot-rod! This engine is roughly 20″ longer than the big block comparisons!