Did the 340 really make 275hp?

This could be a good thread if people look for the information it contains. One thing I really dislike is imaginary horsepower. Guessing or hoping doesn't prove much. It's only been recently I've been really checking deck clearances, CC'ing heads etc. Not much I have measured lately matches what the factory tells you. I've never checked a stock 340, but I do have one. When it comes out, I'm betting that 10.5 to 1 compression is closer to 9.25 to 9.5. A point of compression is significant. Add a less than optimal factory ignition curve, lean jetting, crappy factory exhaust pipes, etc. I would bet that just as many stock 340's out there make less than 275 as there are ones that make more than 275 in stock form. The link to the MM article, and the origional posters results closely mirror each other, and show what mild modifications can do.