Many factors contribute to gas pulsations in positive displacement type twin screw or roots superchargers. In a twin screw, over-compression is a key element. The enlargement and design improvements of the rotors exit port or exhaust port have greatly reduced gas pulsations and the associated whine noise. However, the result heard by the human ear may appear that the 5-lobe design is louder as the higher pitch it produces can seem more dramatic.
The pulsation and whine will always be present at some level, so bringing the whine back is still possible. These two options may work to increase whine, but they have their limits and cost to consider. In most cases, they replace a closed air box system that truly does isolate engine heat from the inlet path and draw cold air from the front of the car or fender well.
Aside from the lack of heat isolation, their increased size and open nature often allow for an increase in exterior whine. It also helps if the hood liner is removed. For those of you who aren't worried about a roller whining, remember what happens when they finally give up the ghost and seize. Choose your comfort level. Techno Duck.
The engine will make some whine noise, its not totally uncommon. Usually the 1 cause of this is a incorrectly positioned balance shaft idler pulley. The pulley should be roughly If the roller is to close and touching, you will get the supercharger like sound.
Again, the noise is a characteristic of the engine, but if its really loud and noticeable then something is adjusted wrong. A timing belt that is to tight typically makes a whirring sound. A tight balance shaft belt will make the whine also.. Tervuren's Garage Copenhagen Blue.
Thread Tools. All times are GMT The time now is PM. User Name. Remember Me? There isn't the additional belt noise, and only a set of small balanced impellers on a very small shaft. I want my car to be fast, not loud.
And I want to to behave like stock when not in boost. That means stock sound levels, stock vibration levels, and stock usability. That's also why I'm going with a recirculating blow-off. No noise that isn't useful. I've also black anodized my intercooler, I want fast not showy.
If you're experiencing vibrations with the blower, perhaps something is out of balance what condition are your engine mounts in? My M45 has not added or increased to any noticeable vibrations, and is dead quiet unless on the loud pedal.
With an O2 clamp, the car's driveability is near stock. Not saying you should go one way or the other, just sharing my experience. I suspect that my vibrations are a design issue, in that I'm not alone in having the problem. If you search on vibration and noise issues on the manufacturers forum, you'll find other examples.
I'm solving the problem by removing the blower. Hard to get more complete a solution than that. Sheldon Sheldon has already pretty much exhausted his options as to whether to keep his blower or not.
That includes talking with Tom though I'm sure it was a while ago. Sheldon, you're still a better man than I. If it was me in your shoes, I wouldn't be nearly as subtle as you about not naming names.
I would be putting the blame or responsibility of your kit right the feet of the vendor responsible IMO. I can't wait til you get the new FM2 and post your impressions.
Have a happy new year. I absolutely love the supercharger whine. As noted by many others, it only makes this sound when you are boosting. During cruise and "normal" if that is possible :D driving you don't hear it. Well, there might be a few whines here and there when accelerating somewhat briskly, but it is much more muted. Cruising at a steady state speed there is no sound at all from the blower, as the bypass is open and you are not boosting.
With a nice loud exhaust combined with the whine of the supercharger, I don't think I have heard a much more beautiful and exotic engine sound this side of a Ferrari V Keep in mind that the pitch and volume of the supercharger whine is basically in direct proportion to the rpm and amount of boost being run.
On the MP62 setups generally the rwhp and under setups are pretty quiet actually. Similarly, on the coldside, except it did make itself a little more known at high rpm. The reason is the blower is spinning at a higher rpm in proportion to the engine rpm, so you hear it sooner, i.
You give it just a little blip and the engine sounds like it wants to leap out at you! Never had or driven one but the sound is superb just gives an extra dimension to the normal sounds of an engine. Not a fan of the whine either, find it a bit annoying. Must admit I love the supercharged Minis. New F-Type sounds well. Right balance of exhaust and whine. Pity it's so overpriced. I would have traded the Z4 for one. Lloydie33 48 posts months.
Very much car dependent for me.
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