Originally Posted by Patrick Olsen
I was wondering the same thing. I understand the iron block would be cheaper, but it shouldn't be that hard to find an aluminum engine, and the weight savings on the nose is more than worth it IMO. The aluminum 5.3L engines (LM4) can be had for $500-800 complete, for instance, and will make tons of power just like the other LS motors.
I see where you are going with this Patrick and I agree complete. There is an LM4 sitting right beside this LQ4 but it is going into a Miata. The goal of the initial project was to keep costs low and as you can see above the engine should be at $0 in the end. Once it is built, its not going to be hard to swap to an aluminum block if that is what I want to do