Now before I start I want to say I've searched everywhere and have found mix thought about this so I want to post this and see what I can get.

About the car:
I have an 01 s2000 with 94,000 miles. Compression is 245 accross all 4 cylinders. Supporting mods are invidea q300, okada project coil packs and spoon air filter. Supercharger is a SOS stage 1 kit with a 1220sl blower and upgraded SOS heat exchanger. Kit has 5k miles from previous owner.

Concern:
I installed the full kit on my own. Kit is fully functional and installed correctly. When I turn the car on (cold start) it gets loud like gears inside turning dry. As the car warms up it gets less noisy but yet you still can hear them. Once you start driving it sounds less and then it's gone you cant hear it but once your back at idle it's horrible (well to me). Is this something normal? I'm afraid that it might need a rebuild even though the previous owner says its normal.

Solution: I'm thinking of staying stage 1 for a while so I was thinking of sending it to Paxton in credit towards a 1220 oil fed. But I was thinking, is it possible to fun a 1200 on a stage 1 kit?

 

All centrifugal superchargers are loud.. I have heard that SLs are louder but have not confirmed it in person.

I would say as long as there's no leaks or anything, you will not need a rebuild.

 

These centrifugal blowers can be fairly "grindy" sounding with the hood open at idle. I guess its just the nature of the ball bearings, I don't know. But my 1220 oil fed is the same way. Loudest right when you start the car cold, get a little softer as it warms but the sound is always there at idle. I guess it gets drowned out by other sounds when rev'd up. I guess I can still kinda hear the grind noise from the drivers seat, but not nearly as pronounced as with the hood open.

The 1200 is definitely doable with your current setup. You might run ~1 PSI higher than you are right now with your 1220, which would be fine. You may need to slightly adjust your RRFPR to give a bit more fuel to stay in a safe AFR range, but that's it. Also, if you ever look at upping the boost in the future, it would be nice to already have the 1200 installed. I personally would look at doing the upgrade just because you are currently running a SL unit and I have heard so many bad things about them.

 

go 1200 oil fed. best blower for our cars hands down.

 

Well that's good news to hear if they are supposed to be somewhat "grindy" on cold starts and on idle. Can anyone else confirm this as well with their SOS kits?

Hmmm good to know. I would rather have the 1200 in case I ever up the boost and I would go with the oil fed this time. Has anyone ever tried to add more fluid than the 4oz it takes? Thinking it would maybe quite it down or help it out?

 

One more question, I'm getting a reading of 7-8psi on my stage 1 but after shifting to 2nd and so on I'm reading 0psi? Could this be belt slippage from having the belt maybe to tight?

 

Bump

 

Just follow the SOS instructions for the belt adjustment. I don't know about the 0 psi, but maybe you just need to readjust the belt tension.

 

Well it says to leave it to where you can turn it 90 or 45 degrees (can't remember at the moment) but if it's 90 wouldn't that be too lose?

 

Per the SOS instructions, mine is tensioned to twist a max of 90 degrees. Maybe you should take it to a tuner to troubleshoot and get it dyno'd.