Looking into Supercharging!!

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Feb 27, 2011 | 12:03 AM

#31

5POINTOH

2nd Gear Member

Joined: Jan 2010

Posts: 199

From: Surrey, BC Canada

Quote:

Originally Posted by 808muscle

I believe jdm has a saleen supercharger on sale right now. Check it out.

I just went to their website and nothing seems to be on sale....I am looking for a Saleen Super Shaker.

Feb 27, 2011 | 08:42 AM

#32

funmoneypit

Joined: May 2010

Posts: 47

From: Michigan

Quote:

Originally Posted by Diabolical!

The Edelbrock and TVS are not twin screws. The only twin screws made for these cars are Saleens, Kenne Bells and Whipples.

I have heard this before. Why do you not consider either of these as twin screws (they both have the same blower just set-up a little different)? This is right off their website: E-FORCE EFI SUPERCHARGER KITS
FEATURING EATON® GEN VI TWIN VORTICES SERIES ROTOR GROUP
I do understand that the rotors themselves are built differently but to me they are still a twin screw (rotor) design. Please help me understand the difference. Thanks

Feb 27, 2011 | 12:16 PM

#33

stealth_GT

6th Gear Member

Joined: Jan 2008

Posts: 6,716

From: North Pole

Well, technically, the Roots are more of a twin screw than the actual twin screw themselves...

Feb 27, 2011 | 12:55 PM

#34

funmoneypit

Joined: May 2010

Posts: 47

From: Michigan

Quote:

Originally Posted by stealth_GT

Well, technically, the Roots are more of a twin screw than the actual twin screw themselves...

That is what I also believe but since the others have been thrown into the "twin screw" category, I think all that I listed before are still classified as such. Thanks

Feb 27, 2011 | 10:17 PM

#35

808muscle

5th Gear Member

Joined: Oct 2009

Posts: 4,752

From: Maui

Quote:

Originally Posted by 5POINTOH

I just went to their website and nothing seems to be on sale....I am looking for a Saleen Super Shaker.

http://s197forum.com/forum/showthread.php?t=53192

From another site.

Feb 28, 2011 | 09:57 PM

#36

Diabolical!

5th Gear Member

Joined: Jul 2006

Posts: 4,491

From: New Orleans

Quote:

Originally Posted by funmoneypit

Twin screws compress air in the rotor housing and then feed it into the combustion chambers. Roots blowers force air into the combustion chamber where it is compressed. There is no boost blowby in a twin screw as there is with a roots. As for the "TWIN VORTICES SERIES ROTOR GROUP" advertising, I can only imagine that Eaton is beginning to understand that more people who buy forced induction setups are aware of the performance and efficiency differences between roots and twin screws and are using the word "TWIN" as good PR. However, I don't believe they'd go so far as to attempt to market the blowers as twin screws because the makers of true twin screws (Whipple, Saleen, Kenne Bell) would probably quickly run to the lawyers.

As far as the actual rotors themselves, the two rotors in a roots blower are visually and structurally identical whereas the two rotors in a twin screw are not. (My avatar will give you a good idea of the cross-section of the rotors in a twin screw.) How that came to be is anyone's guess, but it's just a way for the manufacturers to describe their product. The blowers that are marketed as twin screws are the more efficient choice.

Last edited by Diabolical!; Feb 28, 2011 at 10:01 PM.