StephTell

Odd question but what type of superchargers produces the loudest whining noise and what causes it to whine and what makes the whining worse?

Thanks!

P_is_for_Paul

Supercharger on my cooper S was pretty loud after I put an alta induction kit on it.

rs_traynor

The charger on my focus is mega loud its a powerworks

CrOwSoN15

It's the teeth that make it whine, they're straight cut on older stuff, whereas newer chargers use slightly helical thus reducing whine.
Can't beat a mega loud whine though

StephTell

I need it for my other bike and I want it loud as hell LOL

Eaton M45's are cheap as chips over here, will that do the trick??

m4tt274

iTrader: (2)

arent there two differant types of charger, like screw and ???
i have a total mind blank. One type is louder than the other i thought.

Though, as already said, i would imagine straight cut gears make them scream abit!

StephTell

Screw and centrifugal I think...the screwtype is geardriven and should be loud then, especially with the smallest pulley on it to up the boost!

Need one to put on my hardtail mini-dragster GSXR1100 projectbike...

StephTell

Isn't Will Pedley the go-to guy when it comes to superchargers on here? Is he still here or...?

Beetlejuice

Centrifugal chargers like Vortech and Rotrex are also geared.

StephTell

Ah, ok!

Spoke to someone who has quite a bit of experience with Rotrex centrifugal chargers and he reckons they're crap at making boost low down wich is what I want.

I've three turbokits on the shelf so could easily bolt one of those on but I want boost low down AND a mechanical nightmare because I can lol

Ima Racing

iTrader: (1)

The one on the 98 JAG XJR V8 is the loudest i have heard!

Beetlejuice

The sheer failure rate of Rotrex superchargers should be enough to put anyone off.

SiZT

Roots are the loudest whilst on the throttle, twin-screws are loud'ish at idle, centrifugal's don't really make any noise.

P.S The noise is nothing to do with the gears

stevieturbo

And Rootes types are crap at making power up top. Twin screws are better though.

Lets face it...motorbike engines arent renowned for using low rpm's all day.

So what exactly do you want from the engine package ?

Any PD style blower will be more complicated to install than a centrifugal.

Turbo would be easiest

foxy06

I thought it was the belt myself???

Have an Eaton M62 waiting to go on!

StephTell

A turbo would be too easy and I've done it before so therefor no fun.

Also, a whining supercharger fits the bill in the grandscheme of the bike I'm building.

The fact that bike engines aren't known for making a lot of power low down is completely irrelevant here.
I want as much low down grunt as possible within the boundaries I've set myself.
It would be rather silly not to use a type of charger that produces boost low down because motorbike engines aren't know for making power low down...

Besides: the engine is a 1226 cc engine with heads and cams specced for bottom/midrange grunt. That combined with short gearing and a supercharger will make for a bike that you don't have to rev the tits of to get it off the line!

Caprigirl

The Eaton on my DB7 isnt too noisy inside, however when the car passes you at full tilt you hear it from a fair distance............and it does sound good

CoupeUK

YouTube Kenne Bell Cobra

stevieturbo

Of course it is relevant. PD blowers offer power over a narrow rpm range. Motorbike engines to not operate over a narrow rpm range !
You will be limited by how much you can gear the blower to provide low rpm grunt, without it disintegrating at high rpm.

A PD blower is just a bad choice for a high rpm engine.

Alg1k

iTrader: (2)

This is one of the loudest ive heard

Turbo Zetec

iTrader: (1)

The Eaton chargers are fitted with silencer ports to make them quieter, you can blank these off and port the charger to make a fair amount of extra noise

CrOwSoN15

Right, so what do you think creates the noise?

stevieturbo

What nonsense

SiZT

If it's the belt making a noise then it's too tight

It's the movement of air within the charger that makes the noise, hence why a PD s/c car with a stock airbox won't whine much but with a open air filter it'll be loud as hell.

Elaborate?

Steph, personally I'd be using a centrifugal. PD types would need work on the c/r and camshafts to create decent torque at the low-end, you would also be battling IAT temps alot with the amount you'd have to over-spin it. Use an Eaton if you're going Roots or something like a Lysholm if twin-screw

stevieturbo

Clearly you've never heard many centrifugals then, including mine.

The gears create the majority of the noise. The belt drive can create some noise, but modern serpentine belts run pretty quiet. Even a cogged belt now can be pretty quiet.
They design belts to be as quiet as possible.

But gears, especially if straight cut, there is little way of quietening them down easily.

SiZT

I'll concede that yours is noisy because of the gears, rotrex's (due to the way they are driven internally) aren't

stevieturbo

The biggest 3 manufacturers, Procharger, Vortech and Paxton all use gears. Some helical cut, and some straight cut.

Rotrex would be a very small player in the market by comparison.

Likewise Powerdyne which uses a rubbish internal belt drive, although it would render it pretty quiet.

Alg1k

iTrader: (2)

..,,,,

Spiky

iTrader: (1)

i run a rotrex on my 205 and it's silent

i know someone runninga eaton and it's stupid loud.

Ginge

Whipple,Kenne Bell,they make proper loud chargers.

Whipple


Kenne Bell



Ginge

stevieturbo

Whipple/Kenne Bell are both the same internals, ie Lysholm screw blowers.

I'd say a lot of the aftermarket stuff is made with making noise in mind too. The OEM would make them as silent as possible, whereas people retrofitting kits to their cars obviously want them to make noise.

Hell, Ive even seen people convert their accessory drive setups to a toothed belt to try and make a whine ! ( some with limited success lol )

cossie891

iTrader: (1)

Sorry but the vid with the blue car sounds fapping orrible