Originally Posted by GODSCOUNTRY340
I can't remember who did this dyno test but they got 449 horsepower out of a smogger engine without replacing pistons. Here's how they did it.

heres the article https://www.forabodiesonly.com/mopar/threads/dyno-testing-a-stock-1972-440.249866/


Last edited by R/T1968R/T; 05/06/22 02:40 PM.