Replacing roots with centrifugal - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

View Poll Results: Do you think this would be an effective replacement or mod?
Yes 4 50.00%
Seems pointless 2 25.00%
Seems to contain SOME merit, but could be improved upon (post suggestion) 1 12.50%
Not sure / Other 1 12.50%
Voters: 8. You may not vote on this poll

Reply
 
 
 
Thread Tools Search this Thread
Old 10-27-2003, 03:51 PM   #1
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Mar 2003
Posts: 137
Thanks: 0
Thanked 0 Times in 0 Posts
danpuzak is on a distinguished road
Default Replacing roots with centrifugal

Has anyone thought of, or actually performed a replacement of the roots supercharger with a centrifugal design of equivalent or even greater boost?

I've heard that the roots type superchargers apparently leech quite a large amount of hp from the engine to produce boost. I've also heard that centrifugal designs are much more efficient and don't leech nearly as much HP as the roots design.

Provided this is correct, wouldn't replacing the roots with a centrifugal design be more efficient while producing the same amount, or more boost while leaving more HP to be put to the wheels?

I guess what could be done is mounting a drive shaft to the engine with a pulley on one end of the shaft which would be connected to the supercharger drive belt (or use a dual pulley to be incorporated into both belts for a better "grip"), then the supercharger would be connected to the drive shaft on the other end of the engine bay where all components of the intake and filtering system are located (unless your were moved elsewhere).

I suspect this drive shaft would need to be very finely balanced and the mounting angle of the shaft and the supercharger would need to be perfectly aligned to prevent vibrations which would grow exponentially as the engine increases in RPM Some sort of custom upper intake would obviously be needed, probably not to hard to locate (or one could be customly manufactured... $$$)

This isn't something i will be doing anytime soon due to the lack of $$$, but to me, it seems like a respectable "upgrade".

If anyone has anything to add, or any comments on this, they're more then welcome.
danpuzak is offline   Reply With Quote
Old 10-27-2003, 04:04 PM   #2
Member
Posts like a V-Tak
 
Join Date: Oct 2003
Location: Framingham, MA
Posts: 61
Thanks: 0
Thanked 0 Times in 0 Posts
Findlay GTP is on a distinguished road
Default

the CSC blower is a more efficient blower IMO.
what year Bonnie do you have?
i know on the L67 the blower i put over by the air box so your increasing parasitic loss by sending the power across the front valve cover.
i have a picture of the set up.

depending on what your looking for, i would only see this being worth it if your doing some Serious modifications to your car. you could also look into the M112.

the CSC sound incredible, and look cool but not worth the Money IMO
Findlay GTP is offline   Reply With Quote
Old 10-27-2003, 04:09 PM   #3
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default

Now I don't know too much about it, but will there be any lag to get it spinning until it can maintain itself perpetually?? I think the CSC blower takes more to initialize, right?
TrueWildMan is offline   Reply With Quote
Old 10-27-2003, 04:10 PM   #4
Member
Posts like a V-Tak
 
Join Date: Oct 2003
Location: Framingham, MA
Posts: 61
Thanks: 0
Thanked 0 Times in 0 Posts
Findlay GTP is on a distinguished road
Default

Here are some Pics i took at IDD4 in Ohio last month
Centrifugal SC

Larger view http://www.imagestation.com/picture/...8.jpg.orig.jpg
M112

Larger View
http://www.imagestation.com/picture/...b.jpg.orig.jpg
BLOWZILLA...Scott Cooks 11 second "BAD SSEI"

Larger View
http://www.imagestation.com/picture/...0.jpg.orig.jpg
Turbo (also Scott Cooks)

Larger View
http://www.imagestation.com/picture/...9.jpg.orig.jpg
these would appear to be your options
Findlay GTP is offline   Reply With Quote
Old 10-27-2003, 04:14 PM   #5
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default



Cha-CHING!!!

Big time...
TrueWildMan is offline   Reply With Quote
Old 10-27-2003, 04:20 PM   #6
Senior Member
Expert Gearhead
 
Join Date: Dec 2002
Location: Mississauga, Ontario
Posts: 20,892
Thanks: 0
Thanked 1 Time in 1 Post
Jim W is on a distinguished road
Default

whoa...to bad most normal ppl don't have access to that kind of mechanical resources...

$$ Rack it up $$
Jim W is offline   Reply With Quote
Old 10-27-2003, 04:22 PM   #7
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Mar 2003
Posts: 137
Thanks: 0
Thanked 0 Times in 0 Posts
danpuzak is on a distinguished road
Default

No there is no lag on a CSC. There is no lag on any supercharger because the centrifugal inertia is transfered directly to the supercharger. The only thing that has lag, is a turbo. Thats because of the design of it. A turbo uses air flow itself which comes from the exhaust system, to create it'* boost. If you don't understand where it comes from, take a comptuer fan out of your computer, and blow on the concave portion of the blades very hard and you will notice by the sound you will hear that the fan spins up. Take note of how your blowing with the same force, but you can still hear that whining sound increasing in speed. Turbo lag is just that. It only happens because it uses forced air to spool the blower.

Get it now?[/b]
danpuzak is offline   Reply With Quote
Old 10-27-2003, 04:24 PM   #8
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Mar 2003
Posts: 137
Thanks: 0
Thanked 0 Times in 0 Posts
danpuzak is on a distinguished road
Default

Quote:
89BonnieSE89 Posted: Mon Oct 27, 2003 3:20 pm Post subject:

--------------------------------------------------------------------------------

whoa...to bad most normal ppl don't have access to that kind of mechanical resources...

$$ Rack it up $$
Well i guess its not meant for such "normal people" as yourself then.
danpuzak is offline   Reply With Quote
Old 10-27-2003, 04:25 PM   #9
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default

Quote:
Originally Posted by danpuzak
No there is no lag on a CSC. There is no lag on any supercharger because the centrifugal inertia is transfered directly to the supercharger. The only thing that has lag, is a turbo. Thats because of the design of it. A turbo uses air flow itself which comes from the exhaust system, to create it'* boost. If you don't understand where it comes from, take a comptuer fan out of your computer, and blow on the concave portion of the blades very hard and you will notice by the sound you will hear that the fan spins up. Take note of how your blowing with the same force, but you can still hear that whining sound increasing in speed. Turbo lag is just that. It only happens because it uses forced air to spool the blower.

Get it now?[/b]
That'* what I thought, I just like to have my facts affirmated...

Get it now? j/k
TrueWildMan is offline   Reply With Quote
Old 10-27-2003, 04:25 PM   #10
Senior Member
True Car Nut
 
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Thanks: 0
Thanked 0 Times in 0 Posts
TrueWildMan is on a distinguished road
Default

Quote:
Originally Posted by danpuzak
Quote:
89BonnieSE89 Posted: Mon Oct 27, 2003 3:20 pm Post subject:

--------------------------------------------------------------------------------

whoa...to bad most normal ppl don't have access to that kind of mechanical resources...

$$ Rack it up $$
Well i guess its not meant for such "normal people" as yourself then.
Nor I, for that matter...
TrueWildMan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Back to my Roots !! - with lots of Pics... 2000SilverBullet Performance, Brainstorming & Tuning 131 06-17-2005 01:35 AM
Centrifugal Supercharger crod101 Performance, Brainstorming & Tuning 19 01-21-2005 12:42 AM
Centrifugal SC on a NA Bonne? merlin Forced Induction 8 09-05-2004 04:30 PM
This is for all the driver who still love the roots. speedyguy General GM Chat 8 04-10-2004 11:06 PM
Centrifugal SC Conversion theduckylittle Performance, Brainstorming & Tuning 12 11-21-2002 01:48 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:27 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.