Eaton rates their supercharger (theoretical displacement) in cubic inches. Autorotor and Lysholm rates theirs in liters (61.0 cu? = 1 liter.) Here is where the confusion exists. Just because a supercharger is ?rated? at 112 cu? (1.84L) doesn?t mean it, in fact, produces 112 cu? of air at any rpm and boost. That?s where volumetric efficiency ratings come into play. If a supercharger pulls in 100 cfm of air and discharges only 60 cfm, it has a 60 % volumetric efficiency and produces less boost than another supercharger with 90 cfm discharge (90% efficiency).
Look at the Eaton vs Kenne Bell test conducted by 5.0 Mustang magazine. Between 4000 and 6000 the Eaton boost drops off 2.5 psi from 13.0 to 10.5 and 417HP whereas the Kenne Bell increases boost 1 psi and produces 489 HP (72 HP more) That test, Venomous ****, is a documented factual example of a supercharger ?running out of steam?. Perhaps you just got the superchargers mixed up. So, cu? or liters rating is not the complete picture. Let?s use this analogy, We have two engines, one is rated at 350 cu inches (5.7 liters) and one is rated at 340 inches (5.6 liters) but the smaller displacement engine (engines are air pumps just like superchargers) has a better intake manifold, headers, a hotter cam profile, and takes less friction to rotate than the larger 5.7 engines. The same is true for the supercharger. In addition to displacement, rotor profile, inlet flow, discharge flow and power consumption must be all considered when designing the supercharger.
Venomous **** stated the Kenne Bell boost claims are misleading. Our website lists the boost claims we publish for the Lightning and Cobra. There is nothing misleading. They are based on actual data logged tests. Our kits were engineered to make 700 RWHP - and more - on a Cobra and 600 RWHP on an automatic trans Lightning with the Kenne Bell Boost-A-Pump (42 or 55 lbs. injectors) and Boost-A-Spark (15psi and up). For racing, these numbers could be increased up to as much as 26 psi. Johnny Lightning and Richard (Hammer) have clearly verified this potential. That?s enough raw HP and Torque to twist input shafts, fry clutches and snap half shafts on a Cobra and exceed the capacity of the Lightning trans. I?d say we met our objectives and claims and have not mislead our customers as **** claims. Now let?s wait and see what a Lysholm 2.3 will do - and how it holds up under these boost levels and rpm loads. Since Autorotor owns Lysholm, we have no problem doing some comparisons and explaining why we prefer the features of the Autorotor. Both are excellent superchargers but there are some very basic differences. We knew the Lysholm 2.3 was an excellent choice for everyday low boost applications, but the Autorotor was better suited for the high boost, high rpm applications. Before introducing the new Kenne Bell/Autorotor supercharger design, we spent considerable time with the Autorotor engineers establishing the criteria. The end result was 2 superchargers designed specifically for Kenne Bell?s Cobra and Lightning kits. Foremost was that we knew only too well that our Lightning and Cobra superchargers would be revved beyond the normal recommended Lysholm rpm limit, so rotor stability, shaft diameter and bearing size were all critical to these applications. As you will see, there is more to supercharger design than a size rating. SHORTER ROTORS: The Autorotor pack is 1" shorter resulting in less flex at higher rpm and boost levels.
Since twin screw clearance is only .010", it?s easy to see why shorter more stable rotors were preferred. Although shorter, the Autorotor was still more efficient than the Lysholm. ROTORS:

 

Hey JLP, this is your 3rd post tonight in this forum alone about KB. Why not just refer em to the link where the info can be found ? Dont take Credit for it, Didnt a NY Times reporter get in trouble for that ?

http://www.modularfords.com/forums/s...&threadid=6563

 

Pay attention. He said 'From KenneBell' NOT JL.

 

Hey they unbanned you, So did that JDM Spacer ever work out

 

Yeah, I guess they realized that I'm not (as bad as) kdanner.

As Jim Belle said, the spacer is worth nothing.

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We need to go to SRP.

 

who are you guys anyways?

 

So did you guys end up keeping your jobs?