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Old 09-21-2004, 12:11 PM's Avatar
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I built my own tunnel ram about 1966 or so. May have been the first one ever built?!? Anyway, it had NO bottom end which makes total sense 'cause the velocity signal is totally killed in the shoe-box section. I'm afraid you are stuck with great +3000 potential a the expense of way less than acceptable bottom end performance. Those manifolds are intended solely for top end operation with NO bottom end. So is the double pumper. Only suggestions I can make are 1) consider getting a vacuum secondary carb and/or significantly reduce the plenum volume of the manifold with Devcon Liquid Steel.
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