Possible to disengage S/C? (SK+)

[The Nebulizer]

Is it possible to disengage an S/C easily?

I am particularly interested in disengaging the Infinitas ASA SK+ S/C.

I would want to do this for autocrossing so I could stay in a particular class without the S/C - then re-engage it for regular driving. (I know kind of backwards, but I don't want the small S/C to raise my little 325Step into the highest category.) What all would I have to do in this case. Could I simply remove the belt or something? Or would this not allow any air flow? If it has an idle clutch is there a way to make it permanently engaged off idle?

Of course I would only want to do any of these sorts of things if it was totally safe to my car. I am not looking to break anything with a cheap fix. If it would do any damage I wouldn't want to do it.

Thanks for any help you can give me.

[Activ3]

No, if you could even come up with a hardware solution, you'd then have to find a way to switch back to stock ECU maps whenever you "turn off" your SC

[The Nebulizer]

No, if you could even come up with a hardware solution, you'd then have to find a way to switch back to stock ECU maps whenever you "turn off" your SC

True, but I think the SK+ uses a piggyback software option. I would think that would mean you could actually unplug it to return to stock settings.

I figured it's pretty far fetched, but was hoping someone would have figured a way to do this.

[The Nebulizer]

What about removing a hose or something?
Lock the clutch somehow?

The software issue is a concern, but it seems there most be a way to get the air in by bypassing the S/C somehow. (and as I said, I think the SK+ software can simply be unplugged.)

Anyone know what is going on when the clutch is engaged? Does it just let air flow in like a normal intake? Does the software know the clutch is activated or is it just predicting the clutch will be activated at low RPM?

Any help would be appreciated.

[The Nebulizer]

Techniks told me I could reroute the belt, maybe.
Anyone have any ideas how I could go about this? Or, if it is a suggestion I should work on?

Aren't there any S/C guru's looking for a crazy project to contribute their knowledge to? :)

Below is an image of how the belts look on the SK+ . I couldn't find a similar image of a stock engine's belt route. Anyone?

Thanks for any help you can give me.

http://www.infinitas-gmbh.de/Newdata/images/stories/SK%20Plus-2.jpg

[ritos530i]

I thought the belt is what activates the clutch for the supercharger. Even thought the supercharger forces air into the air hose the air hose has its normal affect. What that means is,it still does as it should when stock. By passing the supercharger pulley will not activate the clutch.
One more thing, just reroute the belt and remove the piggyback and see what happens. That is what any supercharger guru would have done. Its call trial and error.

I am no expert but i thought i would brain storm with you.

[performancenut]

The clutch is mechanically activated; change to an electrical solenoid activated clutch like an air conditioner compressor and you can toggle the supercharger on and off. And yes, the air will still pass through the system if the compressor is not functioning and not making boost and the computer adaptation will asist although it will usually run richly.

[The Nebulizer]

In that case, if I can reroute the belt (or swap it out with a different size) so it does not spin the SC it should run standard aspiration then. I don't know if this is possible as I don't know how the standard belt routing runs relative to the SC belt route - but I could try to find this info.

[Mike Benvo]

The only change you'd have of the car running right with the belt off of the SC, is if you have the DME reprogramed with stock software. Otherwise it's going to run far too rich.

[ritos530i]

He mention he has a piggyback that could be removed. So the ECU should still be stock.

[invisible-z]

Is it possible to disengage an S/C easily?

I am particularly interested in disengaging the Infinitas ASA SK+ S/C.

I would want to do this for autocrossing so I could stay in a particular class without the S/C - then re-engage it for regular driving. (I know kind of backwards, but I don't want the small S/C to raise my little 325Step into the highest category.) What all would I have to do in this case. Could I simply remove the belt or something? Or would this not allow any air flow? If it has an idle clutch is there a way to make it permanently engaged off idle?

Of course I would only want to do any of these sorts of things if it was totally safe to my car. I am not looking to break anything with a cheap fix. If it would do any damage I wouldn't want to do it.

Thanks for any help you can give me.


Hmm...
use the stock belt and route it as if there were no supercharger in the car? That way, the supercharger will not be blowing air into the car but I wonder what the air flow would be if the S/C is not running. Maybe take the intake hose off the charger and let the engine breath that way...

dunno