Super myth

Superchargers are great for instantaneous boost... But I'm sorry, they do require power to turn. Ask anyone with a cobra or any other factory supercharged car that has switched over to a turbo; even the most efficient twin screw will get walked all over by a turbo.
 
I have both, and they are not set up like any other vehicle on the street. The SC freewheels once the turbos light.
 
man, talk about a whole bunch of science in that video!!!

now do it with a turbocharger with the exhaust bypassing the turbine and see which one spins faster (hint: it's the turbo)
 
You figured out the issue of the blower bypass being a choke point once the turbo lights? Im guessing a larger bypass or a second remote one with a second filter?
 
So this is demonstrating the vacuum is enough to overcome the friction in the supercharger bearings? The thing does more than spin when the belt is hooked up...
 
I only posted this to show a specific phenomenon about a specific myth which was derived from out dated technology. Old school blowers and some of the gear driven centrifugal types take a LOT of crank power to drive, or even just to turn. This one does not.
Also understand the vacuum drawing on this is whats left in the pipe thats fed by a 12" long 5" cone type filter, or only an inch or two, very little. This vacuum is much higher at full tilt with the downstream turbos pushing 100psi boost.
 
kawi600 said:
You figured out the issue of the blower bypass being a choke point once the turbo lights? Im guessing a larger bypass or a second remote one with a second filter?
Click to expand...

We found no gains with or w/o the newer larger bypass running turbos only and no difference in vacuum, so I dont think its restricting much of anything now.
 
I might sound green even saying anything, but oh well, got nothing to lose.
IMHO;

The power to turn the supercharger is not spent on the mechanical parts of actually spinning it.
The power spent, that everyone talks about, it spent compressing the air at high RPM when the relief isn't open at all.
 
Once my turbo is spooled my 3" bypass opens and draws from a secondary filter and pre-turbo gauge reads 0 vaccum. I run a new Eaton which is said to take less than 1/2 hp to spin unloaded. I have not seen drop in my average fuel economy.
 
TURBOLVR said:
I have both, and they are not set up like any other vehicle on the street. The SC freewheels once the turbos light.
Click to expand...

Many others have been setup like that for years. Freewheeling takes about 2-5 hp, ask Topfuel guys how much it takes under boost.
 
lorendiesel5.9 said:
Spin that supercharger to 10,000 rpm then come back and tell me it doesn't take power to turn.
Click to expand...

parkland said:
The power to turn the supercharger is not spent on the mechanical parts of actually spinning it.
correct
The power spent, that everyone talks about, it spent compressing the air at high RPM when the relief isn't open at all.
Click to expand...
since I also have turbos, this almost never happens

Leiffi said:
Many others have been setup like that for years.
not likely

, ask Topfuel guys how much it takes under boost.
Click to expand...

PACougar said:
A 14-71 on a top fuel engine takes around 600hp to drive at full tilt, pretty freaking crazy.
Click to expand...

This isnt the same type of blower used in top fuel cars or the same system, virtually nothing is the same, so stop trying to compare just to have something your mind can grasp at.:nail:
 
Last edited:
Unrelated, But Carl, is the blower over twins setup the best out of all the turbo setups you have tried? I know you have done nearly every air setup that can be done...
 
Does anyone make a clutch setup for these supers anymore? The only advantage I can see (since the bypass means theres no drag when the turbos kick in) being the ability to turn off the spaceship sound at will
:lolly:

oh yeah.. does your twins over super setup fit completely under the hood w/o the scoop?
 
Last edited:
ahale2772 said:
Unrelated, But Carl, is the blower over twins setup the best out of all the turbo setups you have tried? I know you have done nearly every air setup that can be done...
Click to expand...

It is. Its because of how/when the super adds boost. No turbo system can be that responsive all the time.

kawi600 said:
Does anyone make a clutch setup for these supers anymore? The only advantage I can see (since the bypass means theres no drag when the turbos kick in) being the ability to turn off the spaceship sound at will
:lolly:
not yet...
oh yeah.. does your twins over super setup fit completely under the hood w/o the scoop?
Click to expand...

It can, but I liked the old school look. I have a client who used a cowl hood, and they can be arranged differently as well.
 
You must log in or register to reply here.
Back
Top