[Model A Ron]

Originally Posted by Jim Brierley

Something to think about on compression. Picture this: You and your buddy both have '30 coupes, and are driving side-by-side down the road. His is totally stock, yours has an 8:1 head, twin 97's, modern ignition, touring cam, etc. Under the above circumstances, both are obviously using the same amount of power, as the speed and wind resistance are the same. So ... the cylinder pressure is the same on both engines, ergo, the higher compression has no detrimental affect on the engine. The difference is you are getting better fuel mileage because your engine is more efficient. So the question is, why are Model A guys afraid of compression???

I have a feeling that if someone has an unknown engine they may not want to increase compression. I was thinking about the 6 to 1 but I hope to talk to Tod about a 7 to 1 if he is making them.