This is an extraordinary BMW performance part. It’s a single side draft manifold for a BMW 2002 or early 3 series. It utilizes the patented Crossover design for even fuel distribution to each cylinder; where other single carburetor manifolds fail, this one is in a class of its own. Your engine will run great.
For your Weber or Dellorto carb to be utilized with this manifold, you need to be provided with carb settings. Remember, all engines run differently and therefore require different carb settings. This is an internationally patented item so you will not see another manifold like this available. They have been producing these manifolds in Australia for over twenty-five years so the sales volume speaks for itself. Others have tried to copy this manifold but their results are terrible. You will be pleased with the performance of this BMW performance part.
Here is how this BMW performance part works. This is for all those that are confused by the crossover manifold concept:
The manifold runs on cylinders 1&4 that connect to one venture(V1) of the carb, therefore cycles 2&3 connect to the other side of the carb (V2). With the firing order being 1,3,4,2 the intake pulse demand from the first cylinder draws mixture from V1 venturi of the carb. The next one demanding is cylinder 3, which draws from venturi V2. The next one in the sequence is cylinder 4, which draws from the same venturi (V1) as number 1 cylinder and then number 2 cylinder draws from number 2 venturi(V2). You can see that the carb takes turns in feeding the cylinders due to the crossover design of the runners feeding each cylinder a fresh batch of air/fuel from the carb, alternating throats as it goes. This is truly a unique BMW performance part.
The patented crossover design splits the pulses (in firing order sequence) that are created by the downward movement of the piston so as one throat receives one pulse, and the next pulse (in the firing order sequence) goes to the other side of the carb. This way the pulses that the carb sees are evenly spaced, allowing better cylinder filling then the conventional design, meaning more power and torque. So this BMW performance part really revs up your engine.
This manifold and linkage kit will cost you around seven hundred dollars for the entire package. But it’s well worth it if you want your BMW to run at peak condition.
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