Supercharger specs.

[isnowi]

Hi all, forgive me for asking what probably seems like a stupid question, but can the direction of rotation of an sc12 or sc14 be reversed? ie they spin clockwise in factory set up (i think) can they be run counterclockwise? from what i have read they are a positive displacement charger, and as such do not compress air internally rather they pump air and compress the air in the plenum, what i am unsure of is whether or not the bypass assembly will work the other way and whether inlet/ outlets are the same size?

any help would be most appreciated..

[Adamal]

Why on earth would you want to make the supercharger spin in the other direction?

You realise that this would cause it to try and suck air OUT of the engine, right? Instead of trying to pump it in.

You are correct however, in the fact that it is not an internal compressor.
This is not what defines it as a positive displacement charger, however.

Positive displacement chargers will give a constant volume of air per revolution. As they increase in RPM, the amount of air volume per revolution is the same.

Centrifugal chargers, such as a centrifual super charger or turbo, will increase by the square of its rotational speed, meaning the volume of air rises exponentially.

[Mr.Phreak]

Maybe he wants to mount one on a Honda

[Adamal]

Maybe he wants to mount one on a Honda

Hahahaha

[IH8TEC]

it's not funny, one honda integra driver wanted to buy my s/c when i was selling it, to put on the car

stupid honda drivers,

[isnowi]

don't hate me cause i have a honda.
i also have a mitsi too

there is however a semi panda 85 sitting out the front of my place at the mo (flatmates) trying to convince him to 1uz it...

My thoughts re the sc14 involve fitting it to a 2.3 honda accord, really just a cruiser that i would like to have some more torque.

I don't mind the honda, it's a nice comfy wagon to cruise in, don't worry no ricey carbon bonnets or anything, and no clear tails or excessively noisy exhausts.

At the end of the day i'd much rather have a euro over any of the jappas.

cheers

[Adamal]

The SC12 and 14 have an electric one way clutch anyway I believe

[isnowi]

Thank you, if it were to work i would remove the existing clutch and run an aluminum driveshaft from the pulley end of the motor to the charger with a clutch on the pulley end so the driveshaft does rotate until the charger is spinning, similar setup to the jackson racing aftermarket setups.

However it looks as if the charger can't really be reversed anyway as i beleive its a modified roots type, i beleive that it has an internal venturi type design created by the twist on the vanes?

[Adamal]

Nope, the vanes are straight.

[isnowi]

Thanks adamal, i did not know that (obvioously) Are there many people who upgrade from the factory charger to aftermarket? There don't appear to be many aftermarket roots type blowers of similar size, i think they are mostly monstrous v8 spec one?

I'll probably be flamed for this next bit too, but does any one have any first hand experience with the buick/commonwhore superchargers?

Cheers

[IH8TEC]

http://www.twincam.org/forums/index.php?showtopic=13680

http://www.twincam.org/forums/index.php?showtopic=14159

[Adamal]

Thanks adamal, i did not know that (obvioously) Are there many people who upgrade from the factory charger to aftermarket? There don't appear to be many aftermarket roots type blowers of similar size, i think they are mostly monstrous v8 spec one?

I'll probably be flamed for this next bit too, but does any one have any first hand experience with the buick/commonwhore superchargers?

Cheers

A common upgrade for the 4AGZE is either to put on a bigger crank pulley so that it makes 14psi (Up fromt the factory 8psi) or use the SC14, which is a physically bigger unit that has a greater flow capacity. Often used on 2.4l engines. I don't know the exact flow capacity though sorry.

evil_si has first hand experience with the SC12 unit and makes crank pulleys, so it might be wise to talk with him.

As for someone who has experience with the bigger V8 roots type blowers, I'm not sure if there would be anyone here sorry.

[Mr Revhead]

the sc14 moves 1.4 litres of air per rev. hence the 14....

[barryogen]

it's not funny, one honda integra driver wanted to buy my s/c when i was selling it, to put on the car
stupid honda drivers,

whats so stupid about that?
adding a SC to any car can be good, especially if the car is missing a bit of low rev torque.