Originally Posted by Keith Atlanta (Post 4257532)

So if they are running so rich how the heck do they get a claimed 29MPG highway?

Originally Posted by SB (Post 4257540)

Crusie is not 50-60% throttle with very heavy load, like a lot of boats are.

I'll take a stab at it, but it probably only takes 35-45hp for a Vette to cruise at 65mph. So,,,,very light throttle, very high vacuum, very little oxygen/fuel in that combustion chamber....ie:very low cylinder pressure.

Originally Posted by hogie roll (Post 4257780)

If you know the Cd and frontal area I'll calculate it with a rolling load estimate.