Electric Superchargers

Post by **dstocks** » Thu Sep 18, 2008 9:49 pm

Anyone know anything about these. Just curious.

http://www.sekaimon.com/ItemDetailView. ... egory_id=0

battons down the hatches and prepares to cop a beating.......

KJ_bob · Post by **KJ_bob** » Thu Sep 18, 2008 9:57 pm

Ive seen them on american and/or australian ebay before

KJ_bob · Post by **KJ_bob** » Thu Sep 18, 2008 10:08 pm

http://cgi.ebay.com/ebaymotors/Electric ... enameZWDVW

http://cgi.ebay.com/Electric-Supercharg ... 638Q2em122

...and there's another

col2560 · Post by **col2560** » Thu Sep 18, 2008 11:11 pm

hey dwain, seeing as how you started the thread maybe you should buy one and fit it and let us all know how good/bad it is???

pete_gpx · Post by **pete_gpx** » Thu Sep 18, 2008 11:25 pm

Well, from what I've read on other forums a while ago when I saw these on eBay, they're absolute rubbish. Apparently the electricity powered turbine could not possibly spin fast enough to create enough pressure to actually make any significant difference to engine performance.

Although these do appear to be higher quality setups then the ones I was reading about, I'm fairly certain the same principal would still apply.

xSlurpee · Post by **xSlurpee** » Thu Sep 18, 2008 11:25 pm

col2560 wrote: hey dwain, seeing as how you started the thread maybe you should buy one and fit it and let us all know how good/bad it is???

I SECOND THAT ... BRILLIANT

Therapy02 · Post by **Therapy02** » Thu Sep 18, 2008 11:34 pm

if it worked, for that price.. wouldn't it be more common, just seems a bit too good to be true.. that said.. +1 to you trying it and getting back to us

Post by **I8A4RE** » Fri Sep 19, 2008 2:31 pm

I cant believe this has been brought up again!!!!! *looks at dwyane dissaprovingly* There is about 15 different threads on this subject.

and just to recap its sh*t dont buy it

Post by **vipfto** » Fri Sep 19, 2008 5:58 pm

hahaha as above^^^ total crap but we always like test pilots???

Grue · Post by **Grue** » Fri Sep 19, 2008 8:57 pm

Gotta be more than 15 now Simon, surely...

Can someone just buy one and stick it on the dyno so we can put this one to rest?

Would laugh my arse off if turned out they did make a difference

Post by **dstocks** » Sat Sep 20, 2008 8:15 am

I thought id probably get that reaction. Deserved it I guess. As I said before, im just a bit curious about this. Isnt a supercharger the same sort of deal. I guess the real question im asking is what is the difference between them that makes a supercharger work and the other rubbish. Im not thinking of buying one, im more interested in the mechanics (which I must admit is my weak point)

Delvance · Post by **Delvance** » Sat Sep 20, 2008 11:39 am

Instead of everyone slagging it off and whatnot, why doesn't someone buy one and try it out ?

Yeah, most of the linked ones will hamper air flow and actually decrease peak power but has anyone seen the really really powerful ones ?

Awhile ago, i saw one where they connected it to a large black garbage bag, it inflated the bag in seconds and then seconds later popped the bag...and it was electric. That spells some serious air flow and the ability to product positive air pressure to me.

I don't have the link anymore but a garage was offering it. I remember they said upon installation, our emanage would need to be tuned as during what there would be 1 or 2 psi of pressure or so.

The electric supercharger obviously drew a lot of current (well an electric fan blowing up a full size garbage bag in seconds...it would take a lot of current wouldn't it), so the unit would actually only come on during what, anything else and it'd act as a normal intake.

I'm no proponent to electric supercharging but before everyone slags it off, maybe someone should test the serious ones like mentioned... i will definitely agree with the ebay style ones being totally useless.

Now before you ask why i didn't go ahead and get it done...well the car was fitted with a real blower instead lol (and no this wasn't the fto).

Grue · Post by **Grue** » Sat Sep 20, 2008 1:05 pm

Right, everyone chuck a few bucks into the pot. Next person going for a dyno-run can try it out. Once and for all we can have a YES or a NO?

nicholas · Post by **nicholas** » Sat Sep 20, 2008 1:51 pm

Delvance, interesting.

I would presume (and yes, presumptions are often dangerous) that the gain (if any) experienced at what would be more than balanced by the loss of airflow at anything less than what because the fan itself creates an airflow restriction when not being used.

Thoughts?

However, I think what we are really talking about is the potential / ability of the device to move air.

For interests sake, a stock WRX turbo moves 360CFM (cubic feet a minute IIRC). The fans that are available on eBay appear exactly the same as the fans you put in your computer to keep it cool. A 12" 12V computer fan moves 79CFM.

So, clearly these electric fans should be rubbish. I'd hazard a guess that our N/A cars, running no boost, still move more than 79CFM through the intake at what, therefore the fans should be a hindrance, not a help.

nicholas · Post by **nicholas** » Sat Sep 20, 2008 1:59 pm

P.S. Delvance, with your garbage bag example...

Let us presume that they were using a cheap, 12v computer fan.
Say that the garbage back took 4 seconds to blow up.

The CF of air moved every second is equal to 80 CFM / 60 = 1.3 CF / second.

Therefore if the fan operated for 4 seconds it would move 5.2 cubic feet of air into the garbage bag in that time.

Don't know about you, but I reckon that figure sounds about right, and thus I'd say the garage was having you on.

khunjeng · Post by **khunjeng** » Sat Sep 20, 2008 3:20 pm

http://autospeed.com/cms/A_2063/article.html

some different overviews.

Have a read of their web sites, more than interesting.

zuihoujueding · Post by **zuihoujueding** » Sat Sep 20, 2008 7:25 pm

OMG! thanks for the wonderful website! really learn a lot!!!!!

Delvance · Post by **Delvance** » Sat Sep 20, 2008 10:34 pm

Nicholas,

Have a read through Khunjeng's link in his post. I was gonna post the same link.

For reference, the garage offering the installation and tuning for this electric s/c was autosport engineering in kirrawee...a shop with a half decent rep. And this was probably about 2 years ago. If the E-ram can provide positive pressure during what in the intake manifolds etc, then the total cfm flow of the unit is exceeding the required cubic foot volume of air required by the engine thus generating positive pressure being boost.

The articles says during what, the basic e-ram can provide about 1 to 2 psi. Lol there's one on there for 20grand that produces 20psi...but it draws 1000 amps hahaha..

da_msta_chizz · Post by **da_msta_chizz** » Mon Sep 22, 2008 1:00 am

umm, in theory wouldn't you hook the fan up to a sensor?
for example, you could have an airflow sensor on the exhaust which adjusts the fans speeds based on the airflow coming from it, so that you would lose barely any power at under what?

And yeah - i wouldn't say the fan is weak.
depending on the fan size, they could put a PC fan at 12v enough to push 200cfm+ (delta, 120mm - computer grade, basic blade design..think of the possibilitys with a variable blade design), which is a shitload when you start to think about it..
for example, a GT30 only pushes 350cfm(ish)at 4psi, so in theory, this supercharger could produce about 3psi @ 120mm intake - a noticable difference, as said by them.
I wouldn't call this fake until someone rips it apart and finds out what sort of fan it's running, because -again- working on theorys, if they got their fan design and speeds right, they could produce 6psi+.

nicholas · Post by **nicholas** » Mon Sep 22, 2008 1:16 am

Hey guys, thanks for the interesting read. It's good to have a constructive discussion on the topic.

One question though, for whoever feels they can answer it... if the e-Ram gives a 13+ atw kw increase for our cars, for roughly $700, why isn't everyone buying one?

I'm a big fan of the law of averages... everyone pretty much agrees that exhaust and headers are a good thing to do because they are relatively inexpensive and release relatively big power gains... whereas the number of AWD conversions in Australia at the moment (0, correct?) would suggest that the improvement gained doesn't justify the cost involved.

In short, if it's easy and value for money, everyone is doing it already... what do you reckon?