Twin screw, or roots
05-05-2009 | 01:44 AM
#22
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From: Huntsville, AL
I've been considering the whipplecharger for quite a while actually, but wanted to get some opinions. cost really is not a deciding factor, but i'm not willing to spend more than around 5k
05-27-2009 | 01:24 PM
#23
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Joined: Feb 2002
Posts: 38
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From: Stafford Texas
the eaton isnt a traditional roots.. its a screw compressor, or a multilobe, high helix roots at best.. but i think they call it a roots to avoit patent infringement ... (M122 left, TVS right)
and to answer the question in the post: "What is the better supercharger for a fully forged crate motor: a twin-screw, or roots? "
the engine doesnt care it responds to boost, charge air temps, and parasitic load from the supercharger... the higher efficiency the blower the the colder the charge.. hence more atainable boost on a given fuel.. also the parasitic drag fo a roots is higher... and the charge is delivered in a pused manner.. so again more drag and less atainable boost before detonation...
if you can afford an intercooled screw type blower it will be a better setup if you are shooting for maximum HP.. if you arent pushing the envelope... then why get somthing expensive, that soomthing affordable can solve???
turbos have other pros and cons... and are supperior in some ways and perhape not as great in other compared to a positive displacement supercharger.. so do centrifugal superchargers...
find out what you want from the engine and stay true to it when you decide on what parts to get.. dont deviate from it once you start building.. and for gods sake, talk to a reputable shop when you have the money to spend
and to answer the question in the post: "What is the better supercharger for a fully forged crate motor: a twin-screw, or roots? "
the engine doesnt care it responds to boost, charge air temps, and parasitic load from the supercharger... the higher efficiency the blower the the colder the charge.. hence more atainable boost on a given fuel.. also the parasitic drag fo a roots is higher... and the charge is delivered in a pused manner.. so again more drag and less atainable boost before detonation...
if you can afford an intercooled screw type blower it will be a better setup if you are shooting for maximum HP.. if you arent pushing the envelope... then why get somthing expensive, that soomthing affordable can solve???
turbos have other pros and cons... and are supperior in some ways and perhape not as great in other compared to a positive displacement supercharger.. so do centrifugal superchargers...
find out what you want from the engine and stay true to it when you decide on what parts to get.. dont deviate from it once you start building.. and for gods sake, talk to a reputable shop when you have the money to spend
http://en.wikipedia.org/wiki/Roots_type_supercharger
copy paste
06-04-2009 | 03:11 AM
#24
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Joined: Mar 2004
Posts: 4,662
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From: Sun Diego
If you want turn-key boost, the TVS is the only way to go. You get proper fueling, intercooling, tuning, etc. for the same price that you will likely just get a compressor from Whipple or Kenne Bell.
