Thread: Tunnel Rams?

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I'm a green horn here but not new to cars and so forth. But I have never could find out exactly what a tunnel ram does. What is the advantage of putting the carbs that high off the engine? Anyone have some good info on these things? Thanks.

Originally Posted by 737Pilot

I'm a green horn here but not new to cars and so forth. But I have never could find out exactly what a tunnel ram does. What is the advantage of putting the carbs that high off the engine? Anyone have some good info on these things? Thanks.

Two carbs. equal more headaches and tuning issues.Buy a good single carb intake like a Victor and install one carb. and have fun.

The tunnel ram attitude designed from a few decades ago was primarily for velocity. When the early versions created great power at the upper RPM band it was found to create lower losses (streetability issues) in the RPM band. R &D through the years has now made some designs that make it comfortable to run through out the band and yet no loss at the top end. To explain a bit of why it is not a preferred choice by a lot of streeters, the tunnel ram is like shooting a stream from a garden hose into a bucket sitting on the ground. The bucket blows over because of improper balance of material going into it. This represents air fuel ratios traveling the the length of the runners at the speed that's needed to work. It's older design made fuel heavy therefore losing molecule suspension within the mixture. Newer designs have improved the flow of the mix to keep it in a state that is more condusive to getting it into the cylinder so the RPM range is broader and more tunable. One carb, Two carbs? Dave has a good idea for the inexperienced novice in keeping it simple. One is easier, two can be challenging, but with patiance, can be fun.