The FACTS From KenneBell Part 3......
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From: lancaster,pa. usa
The FACTS From KenneBell Part 3......
The Kenne Bell/Autorotor is a 4 x 6 (4 lobe male x 6 lobe female) vs the Lysholm weaker 3 x 5 arrangement. More lobes make for stronger reduced flex rotors. ROTOR SPEED: The Lysholm
3 x 5 drive ratio (1.66) is also 10% higher than the Autorotor 4 x 6 ratio (1.5) so the Lysholm torque of inertia is higher. In other words, the Lysholm requires more torque to spin. - Like the larger wheel/tire or taller gears (2nd vs 1st gear etc.) Another disadvantage is that with the same male rotor pulley ratio/boost, the Lysholm will spin the female 11 % faster than the Autorotor yet the rotor weights are very close in weight. Shorter, lower rpm, more rigid rotors with a more efficient profile and long bearing and shaft life is what we strived for. BEARINGS: The Kenne Bell/Autorotor configuration also sports larger O.D. bearings and shafts which hold up better under the higher loads generated by elevated boost and rpm. Lysholm and Eaton both use the smaller bearings and shafts. Again we?re not berating Lysholm no more than GM berates their production 350 engines when comparing it to the GM NASCAR engine. They both perform well for what they were intended for, but one is stronger and more efficient than the other. Kenne Bell designs and sells Ford supercharger kits that meet our power and boost claims. In house testing and our customers tests have clearly proven these products are both reliable and durable. Yes, ****, there is more than meets the eye in superchargers technology.
Feel free to consult us on the higher boost level applications.
Problems? We had a few Lightning failures. We increased the rotor to case clearance and solved the problem. In checking with our service department, there has not been a single ?03 Cobra supercharger failure. Before leaving ****, we?d like to know why you posted a 1 year old post by Dustin Whipple? Why didn?t you post the other half - my letter? Was the intent to point out that Lysholm is involved in supplying superchargers for the GT and therefore ?quality? must be higher - and Autorotor must be lower? That?s is total b.s.
Finally, there appears to be some confusion on supercharger quality that I feel we can clear up.
I can personally state with confidence that the ?quality? of Autorotor, Lysholm and Eaton, OEM or aftermarket, is equally high for all superchargers. However, more importantly than perceived quality is how the supercharger performs and lives in aftermarket Lightning?s and Cobra?s that push the envelope. Aw, that?s not a concern, is it? All you guys are running the same 9 psi low stock boost and therefore not revving the supercharger any higher than designed by the OEM. You?re perfectly content with just the Twin Screw HP gains from lower power consumption. Let?s get real. Many of you will and do push performance to the limit. That?s what going fast is all about. It?s our job to thoroughly test the product for performance and reliability and then make our recommendations, Regardless of ****?s ?opinions,? we stand by our boost and power printed data.
Again, Kenne Bell feels confident that we have designed the ultimate Cobra and Lightning kit.
Kenne Bell is dedicated to helping our customers improve the performance of their Lightning?s
and Cobras. It?s fun. We enjoy seeing the Lightning and Cobras kick A$$. We promise to do our best to keep our customers happy !
3 x 5 drive ratio (1.66) is also 10% higher than the Autorotor 4 x 6 ratio (1.5) so the Lysholm torque of inertia is higher. In other words, the Lysholm requires more torque to spin. - Like the larger wheel/tire or taller gears (2nd vs 1st gear etc.) Another disadvantage is that with the same male rotor pulley ratio/boost, the Lysholm will spin the female 11 % faster than the Autorotor yet the rotor weights are very close in weight. Shorter, lower rpm, more rigid rotors with a more efficient profile and long bearing and shaft life is what we strived for. BEARINGS: The Kenne Bell/Autorotor configuration also sports larger O.D. bearings and shafts which hold up better under the higher loads generated by elevated boost and rpm. Lysholm and Eaton both use the smaller bearings and shafts. Again we?re not berating Lysholm no more than GM berates their production 350 engines when comparing it to the GM NASCAR engine. They both perform well for what they were intended for, but one is stronger and more efficient than the other. Kenne Bell designs and sells Ford supercharger kits that meet our power and boost claims. In house testing and our customers tests have clearly proven these products are both reliable and durable. Yes, ****, there is more than meets the eye in superchargers technology.
Feel free to consult us on the higher boost level applications.
Problems? We had a few Lightning failures. We increased the rotor to case clearance and solved the problem. In checking with our service department, there has not been a single ?03 Cobra supercharger failure. Before leaving ****, we?d like to know why you posted a 1 year old post by Dustin Whipple? Why didn?t you post the other half - my letter? Was the intent to point out that Lysholm is involved in supplying superchargers for the GT and therefore ?quality? must be higher - and Autorotor must be lower? That?s is total b.s.
Finally, there appears to be some confusion on supercharger quality that I feel we can clear up.
I can personally state with confidence that the ?quality? of Autorotor, Lysholm and Eaton, OEM or aftermarket, is equally high for all superchargers. However, more importantly than perceived quality is how the supercharger performs and lives in aftermarket Lightning?s and Cobra?s that push the envelope. Aw, that?s not a concern, is it? All you guys are running the same 9 psi low stock boost and therefore not revving the supercharger any higher than designed by the OEM. You?re perfectly content with just the Twin Screw HP gains from lower power consumption. Let?s get real. Many of you will and do push performance to the limit. That?s what going fast is all about. It?s our job to thoroughly test the product for performance and reliability and then make our recommendations, Regardless of ****?s ?opinions,? we stand by our boost and power printed data.
Again, Kenne Bell feels confident that we have designed the ultimate Cobra and Lightning kit.
Kenne Bell is dedicated to helping our customers improve the performance of their Lightning?s
and Cobras. It?s fun. We enjoy seeing the Lightning and Cobras kick A$$. We promise to do our best to keep our customers happy !
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From: Valdosta Ga.
This is not intended as a flame nor do I want to get flamed but just wondering.The Miata guys all jumped on the autorotor wagon a few years ago it looked to be the forced induction of choice until the autorotors started to eat up bearing by the over heating of continuous boost in other words they did not incorperate a boost bypass to recirculate the intake while in every day cruising this in turn cause heat related failures of the unit.Eaton as far as I know has always incorperated the boost bypass what I want to know is has Autorotor fixed this problem? I would hope so I would hate for Autorotor to get a poor reputation like it has with the Miata guys.
jeff
jeff
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