Advantages of a 4 lobe supercharger?
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 8 of 8
2009-2014 Cadillac CTS-V General Discussion Discussion, Advantages of a 4 lobe supercharger? in Cadillac CTS-V Series Forum - 2009-2014; The LSA and LS9 both went with a 4 lobe supercharger. Any ideas on why?...
  1. #1
    HiTechRV's Avatar
    HiTechRV is offline Cadillac Owners Enthusiast
    Automobile(s): STS-V the most powerful Cadillac you can buy for now
    Join Date
    Dec 2006
    Posts
    653

    Advantages of a 4 lobe supercharger?

    The LSA and LS9 both went with a 4 lobe supercharger. Any ideas on why?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    NormV is offline Cadillac Owners Connoisseur
    Automobile(s): Kooks,MOMO seats,C5 hubs,3489#
    Join Date
    Jun 2007
    Location
    OHIO
    Posts
    1,949

    Re: Advantages of a 4 lobe supercharger?


  4. #3
    atdeneve is offline Cadillac Owners Connoisseur
    Join Date
    Jan 2006
    Posts
    2,114

    Re: Advantages of a 4 lobe supercharger?

    Decreased noise, decreased temperature. Basically, increased efficiency.

  5. #4
    HiTechRV's Avatar
    HiTechRV is offline Cadillac Owners Enthusiast
    Automobile(s): STS-V the most powerful Cadillac you can buy for now
    Join Date
    Dec 2006
    Posts
    653

    Re: Advantages of a 4 lobe supercharger?

    Decreased temperature? That is a huge advantage. Especially with non forged pistons.

  6. #5
    Dr. Design is offline Cadillac Owners Connoisseur
    Automobile(s): STS, XLR, STS V-Series, CTS V-Series, XTS....
    Join Date
    Aug 2003
    Location
    Design Center
    Age
    36
    Posts
    3,347

    Re: Advantages of a 4 lobe supercharger?

    There are quite a few advantages of this new Eaton blower. The 3 lobe design was decent, but when HP demands reach higher than the blower is capable it makes it difficult for the previous gen blower to keep up. The new 6th gen blower (4 lobe) uses 160 degree high twist vs. the previous generation using a 3 lobe 60 degree setup. The old blower also used two pre-charge slits to help lower NVH. The new blower doesnt need it. Also the new blower has a much better adiabatic efficiency when pushed vs. the 5th gen 3 lobe that starts to fall off like a rock when pushed past its limits.

    There is a slight difference in the LSA & LS9 blowers. The LSA uses a 1900 and the LS9 uses a 2300. That 2300 is capable of supporting up to 950HP where as the LSA blower supports up to 750.

    There are obviously other advantages to list, but this should help for now.

    Thanks,

    Dr. Design
    D3 Cadillac

  7. #6
    Florian's Avatar
    Florian is offline crushing Vs with my Wurm
    Automobile(s): 2013 GT500 - 700+ HP
    Join Date
    Aug 2003
    Location
    location, location
    Posts
    12,171

    Re: Advantages of a 4 lobe supercharger?

    can you retrofit the 4 lobe to the 3 lobe charger? Meaning, just plop a new 4 lober onto the manifold of an STSv?


    F

  8. #7
    Dr. Design is offline Cadillac Owners Connoisseur
    Automobile(s): STS, XLR, STS V-Series, CTS V-Series, XTS....
    Join Date
    Aug 2003
    Location
    Design Center
    Age
    36
    Posts
    3,347

    Re: Advantages of a 4 lobe supercharger?

    We could only wish it would be that easy! There is a M122H that is used in the Ford GT motor. This is essentially the same as the M122 used in the STSV/XLRV engine. With slight modifications you could use the M122H rotor pack, but the gains might not be enough to justify doing the conversion.

    We (D3) are developing a new SC replacement that uses the 1900 blower.... This would work for your STS-V/XLR-V applications.
    Thanks,

    Dr. Design
    D3 Cadillac

    Quote Originally Posted by Florian View Post
    can you retrofit the 4 lobe to the 3 lobe charger? Meaning, just plop a new 4 lober onto the manifold of an STSv?


    F

  9. #8
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
    Join Date
    Jan 2003
    Location
    Newtown, PA
    Age
    55
    Posts
    6,472

    Re: Advantages of a 4 lobe supercharger?

    This is what I picked up on one site:

    The single biggest difference leading to lower output for the Cadillac is the supercharger displacement. While the LS9 has a 2.3L blower, the unit in the CTS-V only displaces 1.9L. Aside from the size, the blower is based on the same four lobe rotor design with 160 degrees of twist to the lobes. The design provides greater efficiency and thirty-five percent less power draw than the previous three lobe design in addition to much quieter operation. The maximum boost pressure is reduced from 10.5 psi to 9.0 psi.

    Makes sense.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting