Quote:
Originally Posted by tubman
Oh, so it's the old : "I could tell ya', but then I'd have to kill ya'". 
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Well, actually, I have seen on both this and the HAMB forums, a few years ago, pictures of several of the top fuel drag engines with the heads off.
In the old days I saw the Bean Bandits engine with the heads off several times.
Also several other record setters of the day.
The info is out there if people really want to get it.
The thing is, most people can not tell what they are looking at even if they have a caliper and can measure things. Modifying a certain area by even .010 can lose you 5 hp. Few people can discern .010 with the naked eye.