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CASE INJECTION

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Mike@KenneBell

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We designed the new case injection concept in conjunction along with our recently Patented SPE (Seal Pressure Equalizer). Mounting a water/alcohol nozzle in the top of the supercharger has 2 distinct advantages over injecting alcohol before the supercharger. Who doesn’t know alcohol is corrosive on metals? The rear bearings of the supercharger are exposed to alcohol when it is injected into the inlet system. Mounting the injector nozzle in the top of our billet case “bypasses” the rear bearings thereby eliminating potential bearing damage. We think that is a good thing. The front bearings? Protected by our Patented SPE which helps prevent alcohol from contacting these critical front supercharger bearings. Also, the SPE (standard on all 3.6LC Liquid Cooled and larger Kenne Bell Superchargers) “equalizes” the boost pressure on both sides of the front seals. This increases seal life by reducing friction and wear while preventing pressure from entering the front oil reservoir. The reduced friction accounts for 1-2HP. And it does fit under the stock hood.
Yet another advantage of the Case Injection is the alky/water fluid injection pressure can be minimal (5-10psi) as there is no pressure in the top case of our Twin Screw to overcome.The rotating SC rotors will totally atomize any fluid into a mist. So those expensive big high pressure injection pumps are no longer needed to overcome the higher discharge boost pressure when injected under the supercharger. Where 50psi is necessary to atomize and overcome the supercharger boost. It doesn’t matter with case injection.
In 2003, John Mihovetz (Accufab) and I were working on his KB supercharger Terminator and one of us left a rag in the intake manifold. The twin Screw sucked it in and shredded it into cotton candy. At least that’s what Johns rag looked like to us. So, the innocent looking KB Case Injection which cools 325* of discharger temp a full 125* with water only, protects the SC bearings, reduces seal wear, makes 1-2 HP from lower friction-and fits under the stock hood.


Rather than being limited to one 2L kit, we have designed our line of proven rear inlet systems as upgradeable assemblies that fit the full range of 5.0 HP applications. Case injection is currently only available on the 4.7 series (foreground). Note that normally the alky is injected into the rear inlet manifold. SC bearings to support the shafts are located at the front and rear of the SC case.

Jim Bell
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Travis@boostworks

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You can't go wrong with most of the companies out there selling systems, because they practically all use the same components. We use Devil's Own injection systems. Good customer service, and a really nice product at a decent price.

Good explanation of how case injection works, and the benefit of SPE, Jim.
 
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