Turbo? : loneeagletrading ( 917)Feedback: 99.9% Positive - BMW 3-Series (E90 E92) Forum

JJin909 · 04-05-2006, 03:17 AM

Is this for real?

http://cgi.ebay.com/ebaymotors/BMW-E...QQcmdZViewItem

it really works?

bos · 04-05-2006, 07:24 AM

Not really that useful. The quoted high cfm numbers drop drastically once the fan/blower begins to generate even a small amount of static pressure.

I you really want to do this, save yourself some money and buy a 12V boat bilge ventilator blower for a fraction of the price. A 250CFM part can be had for less than $30.

bos · 04-05-2006, 08:13 AM

Just to do the math on this one:

There's an air-compressor rule of thumb that states 1 HP produces 4 CFM at 100 PSI. Power = (output) airflow * pressure.

Let's look at the cfm at 1 PSI of boost. It would take a 1/2 HP to deliver 200 CFM at +1 PSI. And a HP is 745 watts. No way is a motor drawing a couple of amps @ 12 V (24 watts) going to come even close.

The air consumption of the engine depends entirely on RPM, so any pressure it does produce will fall-off very rapidly with engine RPM as well, since unlike a turbo/super-charger, there is no scaling with engine speed. At 6000rpm, a 3L engine will actually inhale in excess of 300 cfm.

These guys, in contrast, are drawing 60 amps (120 amps for the super version), making their boost claims much more reasonable. http://www.electricsupercharger.com/faq.shtml. This is very much in line with the theoretical power requirements to compress air at these rates and pressures.

longtran · 04-05-2006, 11:25 AM

Quote:

Originally Posted by bos

These guys, in contrast, are drawing 60 amps (120 amps for the super version), making their boost claims much more reasonable. http://www.electricsupercharger.com/faq.shtml. This is very much in line with the theoretical power requirements to compress air at these rates and pressures.

thats my friends shop. he gave me one for my 99 prelude but i never installed it.

ChineseGuy · 04-06-2006, 01:47 AM

Is that Turbonator?

JJin909 · 04-06-2006, 03:05 AM

So if the electric motor draws big power / more juice / moves more air = electric Turbo!

is that right BO?

so in theroy it is working ... just that not powerful enuff ??

bos · 04-06-2006, 04:30 AM

I'm sure it does something, but you'd be looking at a tenth of a PSI at best.

canucklion · 04-06-2006, 12:15 PM

there's sucker born every minute

lux.sh · 04-06-2006, 05:54 PM

turbonator is different.

everyone should jump on this deal. this is crazy. supercharger for $300!
what a bargain!!!!!!!! that thing has been around for awhile. one of the site I goto has contract with them.

I assume it'll gain nothing but 1whp and 10pds of extra unnecessary weight.

04-05-2006, 03:17 AM	#1
JJin909 Private First Class Drives: E90 Join Date: Mar 2006 Location: 909 Posts: 77 iTrader: (2)	Turbo? : loneeagletrading ( 917)Feedback: 99.9% Positive Is this for real? http://cgi.ebay.com/ebaymotors/BMW-E...QQcmdZViewItem it really works?

04-05-2006, 07:24 AM	#2
bos Private Drives: 2006 330i Join Date: Mar 2006 Location: San Jose Posts: 86 iTrader: (0) View bos's Garage	Not really that useful. The quoted high cfm numbers drop drastically once the fan/blower begins to generate even a small amount of static pressure. I you really want to do this, save yourself some money and buy a 12V boat bilge ventilator blower for a fraction of the price. A 250CFM part can be had for less than $30. Last edited by bos; 04-05-2006 at 07:41 AM.

04-05-2006, 08:13 AM	#3
bos Private Drives: 2006 330i Join Date: Mar 2006 Location: San Jose Posts: 86 iTrader: (0) View bos's Garage	Just to do the math on this one: There's an air-compressor rule of thumb that states 1 HP produces 4 CFM at 100 PSI. Power = (output) airflow * pressure. Let's look at the cfm at 1 PSI of boost. It would take a 1/2 HP to deliver 200 CFM at +1 PSI. And a HP is 745 watts. No way is a motor drawing a couple of amps @ 12 V (24 watts) going to come even close. The air consumption of the engine depends entirely on RPM, so any pressure it does produce will fall-off very rapidly with engine RPM as well, since unlike a turbo/super-charger, there is no scaling with engine speed. At 6000rpm, a 3L engine will actually inhale in excess of 300 cfm. These guys, in contrast, are drawing 60 amps (120 amps for the super version), making their boost claims much more reasonable. http://www.electricsupercharger.com/faq.shtml. This is very much in line with the theoretical power requirements to compress air at these rates and pressures. Last edited by bos; 04-05-2006 at 09:09 AM.

04-06-2006, 05:54 PM	#9
lux.sh Hole-in-one. Drives: very smoothly. Join Date: Sep 2005 Location: Eugene, OR Posts: 3,680 iTrader: (11) View lux.sh's Garage	turbonator is different. everyone should jump on this deal. this is crazy. supercharger for $300! what a bargain!!!!!!!! that thing has been around for awhile. one of the site I goto has contract with them. I assume it'll gain nothing but 1whp and 10pds of extra unnecessary weight. __________________ 06 AW E90 330i ZPP/ZSP/Step : Hartge Front : ACS roof : BlkLines : Simota Intake : Blk CF trim : Exhaust valve mod : : Luminics Yellows : 24% Charcoal : V1 Hardwired : Solaris Invisibulbs/LED interior :

04-06-2006, 01:47 AM	#5
ChineseGuy QuickShifter Drives: Black E90 Join Date: Nov 2005 Location: North Pole Posts: 1,318 iTrader: (2)	Is that Turbonator?

04-06-2006, 03:05 AM	#6
JJin909 Private First Class Drives: E90 Join Date: Mar 2006 Location: 909 Posts: 77 iTrader: (2)	So if the electric motor draws big power / more juice / moves more air = electric Turbo! is that right BO? so in theroy it is working ... just that not powerful enuff ??

04-06-2006, 04:30 AM	#7
bos Private Drives: 2006 330i Join Date: Mar 2006 Location: San Jose Posts: 86 iTrader: (0) View bos's Garage	I'm sure it does something, but you'd be looking at a tenth of a PSI at best.

04-06-2006, 12:15 PM	#8
canucklion pull my finger to get your kinder® surprise Drives: circles around you Join Date: Dec 2005 Location: Toronto, Canada Posts: 10,326 iTrader: (9)	there's sucker born every minute