illtal
Well-Known Member
No grinding on the valve cover required...If you want low end torque, then you want a positive displacement supercharger (vs centrifugal). There are 2 different types of PD superchargers, screw and roots. Whipple is the only screw type of the bunch and is more efficient than a roots, meaning that it will make more hp per pound of boost. The Whipple is also 3.0 liters of displacement while most of the roots like Roush, Edelbrock, VMP, etc are 2.65. All of the PD’s are about the same install wise but if I remember correctly some required grinding on the timing cover. Personally I went with Whipple (I also plan on building a forged motor and making a lot more power not too far in the future) but if I was going for a roots style I’d go with either the VMP or Edelbrock before the Roush.
Centerfugal’s like Procharger, Paxton and Vortech are the easiest to install and make great peak power, but will not have the torque or throttle response of a positive displacement supercharger.
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