The Advanced Turbo Systems multi-piece pulse manifold for the Dodge Cummins application with its pulse exhaust flow design, increases exhaust gas efficiency helping to spool up the turbocharger sooner with less exhaust back-pressure.
This pulse manifold design eliminates the problems that persist with the stock manifold in Ram diesel engines, that is namely the shrinking and breaking of the manifolds. The stock manifold in these engines can shrink as much as 3/8 of an inch. This causes exhaust gasket problems, manifold-cracking problems, and exhaust flow problems created by exhaust port misalignment. In 12 valve engines, one sees sheared off manifold bolts, and this extreme shrinkage can sometimes even break the ears off the head where the stock manifold is attached.
Expansion and contraction of the Advanced Turbo Systems pulse manifold is taken up in the expansion joints. These expansion joints are unique in design. Advanced Turbo Systems holds a U.S. patent in the expansion joints design and function. On 12V and 24V units the center portion of the manifold is machined with a straight bore on each end of the center section to accept the end castings. One set of bolt holes have merely a clearance fit where the manifold attaches to the cylinder head, the other set of boltholes have more clearance for expansion. The end castings are where the function of this design becomes unique. The end castings that install into the straight bore of the center casting are a ball circumference seal arrangement. This allows the expansion joint to have interference fit and still assemble the manifold easily; while creating an excellent seal arrangement which allows for expansion and contraction of the manifold while maintaining a positive seal. The end castings of this manifold have one hole that is bolt clearance only. This insures near perfect exhaust port alignment without exhaust manifold movement on the head. This eliminates gasket and bolt loosening problems.
The Advanced Turbo Systems multi-piece pulse manifold is cast of a much higher-grade material than the stock manifold. Instead of being just cast iron like the stock manifold, the Advanced Turbo Systems manifold is a ductile casting, which will handle far more heat without being brittle. This pulse manifold is a high molly-silicon-ductile casting that is machined on state of the art palletized CNC machining centers. This three-piece pulse manifold comes with new socket head cap screws and washers.