Ford Mustang Forum - View Single Post - Big cam in low compression engine- Why not?
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post #2 of (permalink) Old 11-18-2013
Old man
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Because the big cam has a lot of valve overlap, and that bleeds off the cylinder pressure. You don't have enough pressure on the compression stroke to use the fuel octane right at the limit of detonation, so you have weaker pressure on the piston when it fires than you could have with more compression and the same octane fuel.


89 LX coupe with 363, Forced Inductions custom turbo with billet wheel, shaft rocker Fox Lake heads, .800 lift solid roller, 6800 stall Hughes Super Glide transmission, 4.10 gear
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