Been thinkin about FI lately and readin some info on the SC's out there, and i noticed that some members reported vibration issues w/ their supercharger.. Is this only limited to comptech, or only to the older versions, or is it just something u have to get use to? Thanks for the input.

 

Dude, if you go FI you will have to change your screen name!

 

The vibration is also present in a Vortech car. This vibration doesn't emminate from the supercharger. It is already inherent in the S2000 powertrain (engine, tranny, etc.). In stock configuration, this vibration is dampened moderately well. We had the first indication of this vibration with the "clutch decel buzz" in early (and some later) model cars. It's simply just there. Later on, with the inclusion of a different clutch disc, the buzz was mostly taken care of. The vibration was still there but it wasn't being turned into an audible indication.
The fact of the matter is, when you bolt on a significant piece of weight like a supercharger assembly onto the front end of the engine, it changes the harmonics of the existing vibration and how it is conveyed throughout the car. I discovered this as soon as I bolted the S/C onto the car but didn't yet have the belt attached to spin it. Driving around in this fashion showed the new found vibration in the shift knob. So far, the vibration doesn't appear to have any detrimental effects on car in the long term as many high mileage supercharged cars exist. I reduced the vibration through the stick significantly with the addition of the Magnum Titanium Voodoo shift knob.

 

So the buzz between 2200-2600 is "normal" then? I have been trying to pinpoint the source since I took delivery of the car last week. I guess I will just try to get used to it. The extra power more than makes up for it.

 

I can't say that I can detect a distinct buzz between 2200 and 2600, so I couldn't say that this is "normal".
I hope you are not equating the "clutch decel buzz" of my previous post with whatever the "buzz" is that you're talking about. You have not given sufficient description for such a comparison.

 

I have an intermittent vibration between 2200-2600 rpm under a light load (accel and decel) and I can't seem to find the source. I suspected the airbox was resting on an AC line but that is not the case. I can feel near the SC mounting bracket. I will keep looking I guess.

 

Thanks for the input.. and yes, i should've changed my SN a long time ago. lol

 

Vibration to a degree is normal. I mentioned that one of the FIRST things I noticed after firing up the car and driving after the installatioin was that I could litterally FEEL the pedals and knob much more distictly. This comes from the additionally pulley and the belt attached to the crank.

I have since gone back to stock and the vibration is gone...

I miss that old feeling...

After going FI....trial and error showed that a HEAVIER shift knob works wonders over an ultra light knob. It dampens vibration and helps through shift transitions as it passes center stick.

Tim

 

I just want to clarify and re-iterate this point. The additional vibration felt has little to do with the belt driving the blower. I did my installation in stages and continued to drive the car in between steps of the installation. The vibration manifested itself as soon as the blower got bolted on. This vibration didn't change even after the belt was hooked up and started to turn the blower.