Quote:
Originally Posted by twag4
Old engines were not low compression. I took one of my 327 Chevy engines and bumped it from factory 11.5:1 to 12.5:1. Old leaded premium was great gasoline. Many American v8 engines exceeded 10:1 stock. Several muscle cars came with 12:1 and greater.
|
When I built the 440 magnum up for my Coronet R/T I took an engine that came stock at 11:1 to almost 14:1. It ran great on leaded but barely even ran on low octane unleaded. I am pretty sure if I had pushed it I would have ended up with a basket full of smashed engine parts in a hurry.