This is a version of my Custom V8 using constraints. This is my first attempt at using constraints, so go easy on me, but please share your thoughts. Just select the engine controller and rotate it on its Y axis and watch her purr. If you want to animate this model yourself I have uploaded a stripped down version also. Enjoy and have fun.
The Blend file has been updated. I have reworked the timing setup and simplified the constraints a little. Hopefully this will be of help to someone wanting to study constraints. I unfortunately haven't found much material on the subject, and I'm sure the way I have set it up isn't conventional, but it works for the most part. If you have input or extra knowledge that would be useful to me or others, please share.