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Old 08-12-2004, 10:47 AM
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tunnel ram manifold

I am rebuilding my boat, and after blowing up the previous motor which was a blown 350 sbc, I decided to go with a duel quad tunnel ram manifold,, I am using vortec heads, with a edelbrock performer rpm cam,, 488- 510,
I bought a manifold on E/B that susposeably came off of a boat, it has a square plemtum area with a removeable top, the bottom chamber has been filled with some type of epoxy to take up the plentum area, below the top of the runners,which when looking down through the carb bases, it is almost like independant runners, [no plentum area] and when the top is bolted on there isn't any plentum, just a direct shot to the head runners,

My question is >> will this thing work ok at low speeds? I havn't got the boat all together yet, and was wondering if anyone has had any experance with something like this, I know that tunnel rams were designed for mostly top end performance, but they had some plentum area, I also wonder if this might be someones experament that didn't work and unloaded it,
THanks for any help , Bill

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Old 08-12-2004, 11:10 AM
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should work better than before for low end. dude, tons of boats run tunnels
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Old 08-12-2004, 04:21 PM
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Sounds like an old Edelbrock TR-1 manifold. Most of these were filled with epoxy because they had too much plenum area. The design of the manifold left raw gas puddling in the plenum and runners. It made for some wild fire shows when the engine would burp!! These intakes are antique. They won't work on Vortec heads!!!
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