spreadbore or square bore?
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Elder User
Joined: Dec 2007
Posts: 526
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From: fallbrook ca.
spreadbore or square bore?
which is better for fuel economy?
i here the spreadbore is better because of the small primaries but am not sure. would anybody like to clarify this for me?
i here the spreadbore is better because of the small primaries but am not sure. would anybody like to clarify this for me?
Senior User
Joined: Dec 2005
Posts: 350
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Personally don't have experience with the spreadbore. Just read an article that when cruising around you run on the smaller primaries. so basically a two barrel until the secondaries open up. Racers tend to use the square bore because the primaries and secondaries are the same size. Better air/fuel distribution through out the manifold.
