exactly.

hooley, along with other posters, thanks for putting the info on your experiences out there. it really helps out us guys that arent as well informed as you guys make better decisions with our hard earned money.

Make no mistake, I'm very miss-informed. However i will have a review with dyno gains from the the AMS pulley

With the ams pulley the rwhp won't be seen as much as to how the car changes in the street. It will pull a lot better in low end, the torque is really what i saw mostly in the dyno with this mod. Hooleyboy don't be mis-informed just ask that way you don't make any mistakes.

I researched aftermarket superchargers after I made the HPS mistake and found the following differences between the Kleemann and Renntech SC's.

Kleemann: Autorotor "same as Kenne Bell"- 2.4 litre, 4 male, 6 female lobes. larger bearings. High Boost
Renntech: Lysholm "same as Whipple" - 2.0 litre, 3 male, 5 femial lobes, smaller bearings. Mid Boost
AMG: IHI "Japanese clone of Lysholm",
OEM-4 Cylinders: Eaton "Roots Style" least efficient.

That was why I decided to go with a used Kleemann ($7-7.5K) instead of a new Renntech ($15K).

changed their supercharger ... it is no longer the same as the one AMGSC bought.

naw i meant hes buying everything all at once

This is correct, it is more improving the efficiency of the engine. In theory its not actually increasing HP its reducing the amount of HP robbed by unnecessary things. Essentially it takes robbed HP and transfers it to the rear wheels instead of losing it in the cranks rotating mass, thats also why fuel efficiency improves as well.

I have no idea where you are getting your information but these are completely baseless allegations. He can buy the pulley from whoever he wants. And also AMS has a completely unique parts whom nobody else has and also they haven't copied anyone else b/c these parts do not exist. I hope you realize there are like 3 or 4 different AMS in the tuning industry. make sure you have your facts straight before you make false accusations.

It also depends on which type of dyno you use. Dynojets aren't true dynos, they are inertia meters so they measure the inertia of the whole system, then backwards calculate HP & torque. Dyno dynamics dynos measure the actual torque at the rear wheels. You can gain 15HP/TQ on a dyno dynamics dyno and make none on a dynojet simply b/c they measure power in completely different wance. The Dyno Dynamics numbers are the real ones, but even so they still don't factor in the lightweight flywheel effect that the pulleys have which can't really be measured on a dyno but can be felt on the street.

As most reasonable people know - it's the torque in combination with vehicle weight which sets the acceleration rate and HP in combination with drag that sets terminal velocity.

So yes in an extreme case removing rotating mass will enable more torque for acceleration, hence why light weight flywheels are popular. This effect is most noticeable in light weight cars with hi revving engines and little torque to start with - ie race cars and the like. On 3000lb + road cars the effect is minimal, especially when you have a V6 or V8 with gobs of torque to start with.

But my beef is with the bogus 10HP increase and improved mpg - a light weight pulley does not help, nor does a light weight flywheel.

In fact I've never seen anyone claim hp or mpg improvements by using a light weight flywheel, much less a light weight pulley.

This topic has been beat to death on the other MB forum.