Originally Posted by RATTRAP
Originally Posted by JERICOGTX
How much HP does a aluminum block really lose HP wise vs. an iron block?


Did you mean gain?
Weight is everything when it comes to putting HP to work


I understand that. I've read in the past that an aluminum block doesn't seal as well as an iron block. Just wondering if anyone has done a real world test of identical engines with only the difference being the block material?


69 GTX 68 Road Runner