Elec. Supercharger

[Beswick]

I was browsing through the internet the other day and came to the conclusion of putting a electric super charger in my 320i. The super charges co. said that it comes with a ecu that will parallel with my existing ecu. Any probs i should expect with the l-jetronic system.

[Brianmoooore]

Not again!!!! Total, utter scam. Does not work. Walk away!

[Morat]

Would you like to buy these beans? They're magic beans!

[Beswick]

Im not looking for something that will force my eyes back into my sockets and make me look like iv been hit by 11kv of electricity, just a little something for a little extra power. This particular one pushes 8lbs of air, so im hoping it will help with the lag im getting from the auto box. Nothing serious.

[Morat]

You're better off getting a chip from Ant or the zone shop. Seriously.
Electric superchargers are actually restrictive. Don't be taken in.

BTW, if you actually got 8psi boost from a supercharger you'd be looking at over 230hp from an M20B25. I don't know what the figure would be for a 2.0 I don't know if anyone has turbo'd one.

[Brianmoooore]

The most obvious point to consider when considering this and various other scams which appear from time to time in search of the gullible is: If it works, why hasn't it been adopted by the major motor manufacturers?

[Gibson]

Would you like to buy these beans? They're magic beans!

They will cure cancer, baldness, head aches and make beautiful women want to sleep with you!

all for just $1.99!

[Phill172]

Pssh, electric power? Use a garden leaf blower, petrol baby!

[Beswick]

Thinking of using Radio controled jet motor and turbine controled by a variable speed driver with a potentiometer connected to the throttle. When the throttle is at held, the turbine will spin at the appropriate speed and as the throttle is depressed, the turbine will speed up according to the position of the throttle lever on the throttle body. The turbine Spins at 33000 rpm and has enough force to power a 1.8kg model plane.

[v_nitro]

Dosent the turboprop heat the air up quite abit? Your best off building a proper staged compressor with a 2-stroke engine linked to your main throttle.
The only working electric charger iv seen is quite massive and requires a few batteries to run for a couple of minutes, after that you need to recharge it for a while - great for the strip but total waste of money for anything else.

[Morat]

Thinking of using Radio controled jet motor and turbine controled by a variable speed driver with a potentiometer connected to the throttle. When the throttle is at held, the turbine will spin at the appropriate speed and as the throttle is depressed, the turbine will speed up according to the position of the throttle lever on the throttle body. The turbine Spins at 33000 rpm and has enough force to power a 1.8kg model plane.

How much air does your 2 litre engine breath at 6000 rpm?
HINT: Assume Volumetric Efficiency to be approx 85%

[magoose]

Too much for an electric pump to blow in, my mate tryed it, what an utter waste of time and money! for similar money chip it! thats if the zone chips are good??

[magoose]

Just checked the jet engines, they run too hot so would probably melt everything. and they cost the same as a garret turbo, expensive!

[ShepsEvo3]

Tried one of these on an 1100cc buggy (not a bike engine) recently. It gave gains below 3000 RPM (2bhp max) where from then on the electric supercharger actually became a restriction.

DYNO tested by ME to prove to a guy that it doesn't work. And it kinda did initially, but certainly won't do anything but loose power on a bigger engined car.

[mrLEE30]

Brian shame on you, please let these people enjoy the power produced by the 12V 20W blower, just cause you dont think they work why spoil it for everyone else.

I have two of these electric superchargers on my car, one blowing in directly to the AFM and a second wired in a specially designed reverse single phase DC rotation configuration linked to a class D MosFET amplifier which allows a full 20W even after the voltage drop, this second supercharger sucks the gasses out of my exhaust (i have taped it to the silencer with heat resistant duct tape) this produced a very noticable twin supercharger effect and a proven gain of somewhere up to 50HP and 59Nm-1.

well worth the money.

buy one and find out for yourself

mrlee

[Brianmoooore]

The only working electric charger iv seen is quite massive and requires a few batteries to run for a couple of minutes, after that you need to recharge it for a while - great for the strip but total waste of money for anything else.

If you're going to use electricity to boost the power of an engine for short periods, then the way to do it is to use an electric motor to supplement directly the output of the engine - as is done on the latest hybrids.

[Beswick]

The turbine im refering to is a 12v 300w max miniature brushless dc electric motor. Doesnt make a lot of heat, only what the motor generates. Oh, the turbine actualy blows over the motor so no risk of it failing.

[Beswick]

Localy here in S.A i cant get a chip for the l-jetronic system.

[Turbo-Brown]

Thinking of using Radio controled jet motor and turbine controled by a variable speed driver with a potentiometer connected to the throttle. When the throttle is at held, the turbine will spin at the appropriate speed and as the throttle is depressed, the turbine will speed up according to the position of the throttle lever on the throttle body. The turbine Spins at 33000 rpm and has enough force to power a 1.8kg model plane.

How much air does your 2 litre engine breath at 6000 rpm?
HINT: Assume Volumetric Efficiency to be approx 85%

Ooh ooh! <raises hand in air and waves it around>
Me sir me sir!

I reckon it's 5100litres of air / minute.

33000rpm isn't really very fast compared to say 100000rpm for a proper centrifugal S/C, or over 150000rpm for a turbo.

Give it up dude, there's no mileage in this!

[jaistanley]

[d6dph]

Surely there can be a code put into the forum software that autolocks threads like this.

[1an]

Surely there can be a code put into the forum software that autolocks threads like this.

im sure i heard one of these on your car Dave,

[Gibson]

Surely there can be a code put into the forum software that autolocks threads like this.

but that would remove any chance of some very amusing banter. watching people get Reemed is very amusing

[Speedtouch]

Localy here in S.A i cant get a chip for the l-jetronic system.

That's because it's analogue and doesn't use an EPROM chip.

[Beswick]

So i aint got nothing to lose

[Morat]

apart from time, money and the possibility of sucking bits of crappy fan into your engine, I guess not.

Oh, power - you'll lose some of that.

[Speedtouch]

You'd be better off spending a few quid converting it to Motronic (which gives an extra 4bhp in itself), then chipping it.

[Beswick]

How would i convert?

[Brianmoooore]

You'd be better off spending a few quid converting it to Motronic (which gives an extra 4bhp in itself), then chipping it.

Almost word for word what I was just going to post - then I noticed a second page to the thread!

[Speedtouch]

How would i convert?

Do a search - this has been covered a number of times. It basically involves swapping the Motronic parts (loom, ECU, distributor, injectors) from a donor car onto your own - all bolt-on stuff. An alternative is to fit Megasquirt standalone management; see Flappysocks' website www.diyefi.co.uk

[AlpineAde]

Megasquirt would be a very viable alternative.

Have a look:

http://www.msefi.com/index.php

[AlpineAde]

see Flappysocks' website www.diyefi.co.uk

Nice link! I can use that....

Cheers!

[Gibson]

So i aint got nothing to lose

Apart from your dignity and a chunk of your cash.....

The most respected and brutally clever members on this forum have told you it does not work, and infact loses power! and this has been proved, how can you be so naive that you believe everything ebay tells you?

i cant wait for the thread in 2 weeks time that says

"what damage would have happened to my engine if i had accidently sucked in part of a badly made plastic fan"

Jog On

[AlexBaur325]

Well put

[v_nitro]

Picking up from abit earlier. The electric charger i was referring to, sucks in ALOT of air in a short space of time. Having this connected to your car's electric system will put a huge strain on the alternator, the belt will slip assuming it actually gives it enough power.
The way its done is the chargers are powered by separate bank of batteries, once the charge is depleted you switch the circuit over to recharge the batteries ready for another boost. Kind of like nitrous, except you dont need to go refilling the bottle.

In theory you could have a small turboprop that drives a compressor at high RPM, im not sure how effective that would be need some calculations - ether way it has to suck in at least as much air as the engine does by itself at top speed not to hinder the output. But you may aswell get a turbo for the trouble.

Talking about aviation tech on a car, how about fitting a scram-jet at the back - its a flat shape. All you need to do is get the air to supersonic speed on the intake