Retired Air Force
How much power is lost going to an aluminum BBC block?
Well according to Dart the Big M with a standard 9.8 deck height and 4.5" bore weighs 260lbs so there's 120lb savings right there.I never checked the weight on my 9.800 Dart aluminum block, but Dart says it is approximately 140 pounds. What does a cast iron block weigh? Then if you compare aluminum vs. cast iron heads, the total package should be alot more than 75 pounds less, don't you think???