from the above i think andy says the actual unit produces .45 bar ~ 5psi plus atmospheric 1 bar making 1.45bar?

why wouldnt it work??

A normal turbo just uses the exhaust gasses to spin the turbine. This uses the battery.

fuckin hell, you serious?

Nice example of a moderator there

i'm guessing he will still be able to see the post you deleted due to the fact he's a mod

Deleted items section The things us little mortals cant see!

Toyota make there's go faster by jamming the pedals

Hahahahaha, must be an extra 50bhp?

70,000rpm is more than fast enough,the Rotrex supercharger is the same design but powered by wheel - you're telling me that runs more than ten times engine speed? Id like to see the pulleys on that.

The Rotrex units can spin at a few hundred thousand rpm, but they're geared up internally. After all, they're essentially belt-driven turbos, so need to spin just as quickly as a turbocharger to be as effective.

However, regardless of that technical inaccuracy, this unit may well work as advertised - market leader Honeywell Garrett have invested a fair bit in recent years in electric turbos as downsizing to meet ever more stringent emissions regulations becomes the latest fashion. With the increasing appearance of HV batteries in hybrid drivetrains there's plenty of electrical power available in some vehicles to support such systems. Even in cars with just conventional 12V batteries, battery management systems (i.e. an ECU that monitors the battery state of charge) mean that you can push things much further by controlling electrical loads and generation.

Clearly you couldn't go and whack this on a boggo 1043cc Mk3 and use it all the time without the battery going flat, but if you're just engaging it to support transient acceleration then that's not a problem. Would be useless for boosting your top speed much, as you couldn't hold it in for long enough - but for the 0-60 dash it'd do just fine.

A pressure ratio of 1.45 means 0.45bar of boost, NOT 1.45bar... Pressure ratio is compressor outlet pressure (i.e. absolute boost pressure) divided by compressor inlet pressure (i.e. atmospheric in most applications).

So you've got 0.45 bar of 'boost', plus 1 bar to make 1.45 bar absolute compressure outlet pressure. Inlet pressure is atmospheric = 1 bar. 1.45 / 1 = Pressure ratio of 1.45. Done.

Enough said really (although its way over my head :( )

from the above i think andy says the actual unit produces .45 bar ~ 5psi plus atmospheric 1 bar making 1.45bar?

What we all talk about being 'boost pressure' is what you'd see on a boost gauge, which in this instance is 0.45Bar or 6psi. This isn't absolute boost pressure.

Your absolute boost pressure (i.e. pressure relative to zero pressure) is 1.45bar, but as atmospheric pressure is 1 bar absolute you only get 0.45bar of 'boost'.

Classic thread development -this is why the halfords skool of motoring cheep tack isle rakes in so much money for them!

Think u get more bhp by adding speed stripe stickers.

To answer the original question - dont waste you time and hard earned money mate, think you would be very disapointed, just give your car a good service will be 100% more cost effective and worth while.

oh oh oh i got an idea we put this and the turbo exhaust whilstle and we'll be flying POLOS WILL HAVE THERE TIME! oh YES! and we can get Tin Performance to map it for us after with his etch-a-sketch

i agree with what the other dude said you want power buy real parts..

Dimz

I heard these slow your car down as the are blocking the airflow into the inlet... I read somewhere that someone dyno'd a car with it on and off and it was worse with it on.

So they are a complete waste of time

Gozzard, why do you keep posting insulting messages aimed at mods and then deleting them?

Thats 2 times i've noticed you do it in this thread now, grow some fucking balls.

from the above i think andy says the actual unit produces .45 bar ~ 5psi plus atmospheric 1 bar making 1.45bar?

What we all talk about being 'boost pressure' is what you'd see on a boost gauge, which in this instance is 0.45Bar or 6psi. This isn't absolute boost pressure.

Your absolute boost pressure (i.e. pressure relative to zero pressure) is 1.45bar, but as atmospheric pressure is 1 bar absolute you only get 0.45bar of 'boost'.

I know where I went wrong with the calculation I made now. I used 1 atmosphere as base the the 1.45 on top. Oops noob error there.

So mclovin is safe from donkey...for now

Any one know what pressure is possible at 60mph by using RAM air? Don't think it would be possible to reach 6psi that way? Would it?

Hmm, I must confess to no looking at the link when I first posted in this thread.

Andy is right, pressure ratio is the ratio between the comp inlet and outlet pressure.

I'm sure that the unit has the capability to pump enough air to make around 110bhp, although thats a massive stab in the dark, without a compressor map I couldnt say for sure. However, anything beyond its max airflow, the thing would be a total restriction, so you would have to bypass it to make much more power beyond that, and just use it for low end torque/power. Or have two of them.

Also, you have the issue of powering it.

If steady state current flow is 220 amps, then x this by 12 to get the power in watts which is 2640. One watt is 1.341x10-3 so that works out at 3.540 bhp to run this thing. Assuming you have an alternator big enough, and assuming that its 65% efficient we can divide 3.540 by 0.65 and it will sap 5.45 bhp from your engine. A lot less than I was expecting if I'm honest.

Its worth noting that its a supercharger and not a turbo, as its not powered by a turbine.

So really its just another engine parasite like all superchargers, although it probably has its uses in certain dutys. Better off with a turbo for performance.

How is McLovin safe from the donkey? Typical scepticism aside,from people who have put nothing else forward,the sense in this topic say it would increase an engine's power if fitted. No surprise,it's a compressor.

It may not work continuous at full pressure,or without other modifications,and not cheaply,but it would at least give the engine more air than it could suck N/A. Therefore increase power,even if more of a Saab style light pressure turbo.

Pucker up,dude!

It's not McLovin you should be worried about, it's the Donkeys...

But to be fair this topic is way above my head and all i have gathered is, you cannot make something go reliably fast from strapping on one part.

(clicks on link and presses buy button ) i agree this thing = utter shit simple haha

Edited 20 February, 201016 yr by vw-nay

get a hair dryer, wire it up to the fan, reverse the heating element so it becomes a cooling element and then attach it on to a switch in the dash, when you reach a certain amount of revs, say 3.5k flip the switch and let it blow cool air into your induction.

this will work, honest but you'll have to use a decet one, none of this £5 tesco nonsense.

This one do rich?

Its a Twin Turbo!!! :lol:

Edited 20 February, 201016 yr by Cymro

oh my god!!!! what i idea rich, thought id try it, made about atleat 20bhp on top!!! and the reponce of the throtle is massive!!!

i've got a old cpu fan knocking around somewhere, i feel a bit of a macgyver/A-team moment coming on!! better ring my insurance company up and declare it all!

can't upload tonight but some funnys coming tomorrow! beware of extream power output!!

The reason it won't work is tt's not about pressure, it's about flowrate.

How is McLovin safe from the donkey? Typical scepticism aside,from people who have put nothing else forward,the sense in this topic say it would increase an engine's power if fitted. No surprise,it's a compressor.

It may not work continuous at full pressure,or without other modifications,and not cheaply,but it would at least give the engine more air than it could suck N/A. Therefore increase power,even if more of a Saab style light pressure turbo.

Pucker up,dude!

not quite mate...

pressure ratio means its 1.45 above normal atmosphere = 1.46 bar = 21.3 Psi

as for the amp draw that cant be right.

i'll suck off a donkey if that things pushing 21 psi

it was the fact that it could make 21psi that i was disputing, which just turned out to be bad maths in the end any way...

looks like the donkey is safe for now

So, to summarise:

eBay PC fan-based electric turbo kits = shite.

Kit posted in the original link = potentially credible item.

Pressure ratio is the ratio between the compressor inlet and outlet absolute pressures.

Electric turbos (superchargers) require a lot of electrical power to work - so limited in the way you can implement them.

McLovin doesn't have to do any donkey-loving.

Am amused by the number of opinions expressed in this thread where people either haven't bothered to read the original link, or don't understand what they're reading.

The electric boosting concept might seem pointless if you're looking at sticking one on an old Polo, but with modern vehicle electrical systems there are some real opportunities to exploit this technology. I already mentioned hybrid vehicles, but 'e-boosting' need not be limited to full hybrid applications.

With start-stop systems becoming more commonplace some manufacturers are using the alternators to re-start the engine when it's warm and are getting very clever with electrical load control and power generation. Add a bank of supercapacitors and some clever control to one of these systems and you could store quite large amounts of electrical energy in the short-term without needing a battery the size of your boot.

Stamp on the brakes and the alternator does its best to transfer as much energy as it can into the supercapacitor bank (rather than your brakes dispersing it all as heat), so then when you floor it again your electric turbo can give you a nice boost using all the electrical power you just stored.

Having said all that, I'm not aware of any OEMs trialling this technology at the moment - so 'e-boosting' may just end up being a bit of a curiosity. More conventional turbocharging seems to be the preferred method, especially if VGT technology can be robustly applied to gasoline engines.

It's all about downsizing, fitting smaller engines with the power output of bigger ones - if you address the issue of turbo-lag then you can have your cake and eat it. VGT helps, or VW have used a turbo and a supercharger, or there are other more exotic options such as 2/4-stroke switching engines - where the engine runs as a torquey 2-stroke at low rpm, then switches to 4-stroke operation at higher rpm.

Have gone off on another waffle there, sorry!

soo.. that's a kind of KERS system then?

and don't worry about going on a waffle, a just learnt a whole bunch of things from that post, more than pretty much all the other posts in this thread so far. and if this is the way cars of the future may be developed, its worth knowing about.

The electronic KERS systems were a good example of passenger car technology being applied to motorsport rather than the other way around! So yes, similar to a KERS system, but instead of getting a boost from an electric motor it could be from an electric supercharger instead. Perhaps!

This one do rich?

Its a Twin Turbo!!! :lol:

Hahahaha god, dont let club saxo see this thread.

This one do rich?

Its a Twin Turbo!!! :lol:

Hahahaha god, dont let club saxo see this thread.

or 206info.co.uk

twin turbo 3500 does that mean it gives 3500 bhp?!?!?!?!?

Edited 21 February, 201016 yr by leonh

the reminton one i used is 700watts so is you times 700w by a random number of your choice then devide that by a odd number high than 675, minus the atmospheric presure on mars, you get a total added bhp of nothing except utter dissapointment!!