Originally Posted by Wayne Davis:
2. All engines must use an original manufacturer’s OEM engine block, OEM cylinder head and OEM crankshaft. Engine blocks, cylinder heads and crankshafts must be from the same OEM manufacturer.
Does this mean it has to match block to head to crank as it came from manufacture 2.4/2.4/2.4 or as long as it is OEM GM...OEM Ford ect.... as in a 2.4 block Ecotec with a 2.2 Ecotec head with a 2.0 Ecotec crankshaft...all GM buy 3 different engines? please clarify
Wayne, first thank you for asking. I know we haven't always agreed on things and I appreciate your question.
The short answer is no. The block, head and crank do not have to match (my engines do match in case anyone is wondering) but they don't have to. As long as it is OEM Chevy to OEM Chevy it would be legal. On the Chevy Ecotec specifically it actually saves money to use the 2.2 head over the 2.4 head because no mods are necessary, it elminates the VVT and there are more cam options for the 2.2 head. We have found that you DO NOT have to buy three different complete engines to get this. You can buy a head by itself, a block by itself and a crank by itself and still spend the same amount as if you bought a complete engine. Using a 2.0 crank in a Chevy Ecotec would be detrimental because you are likely not able to get to a competitive cubic inch limit using that crank.
If you put a 2.0 Ecotec crank in a 2.4 block you would only have an engine with 127.68 cubic inches for example.
One thing to understand about these OEM engines. They (Ford, Chevy, Honda, Chrysler etc) purposely use many of the same components from engine to engine. That is GREAT for the racers who want to use those components because it means there is more available long term.