Somthing like this inline blower:

http://www.go2marine.com/product.do?no=75432F

It is rated for 240 cfm. Can it help for low speed boost and once the turbo starts supplying air it'll cut off?

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1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection. Next in the list is water injection.

No, it won't work at all. CFM is 100% meaningless when it can't make any pressure.

The turbo has over 60HP worth of energy going through the exhaust to make 12psi of boost. Do the math, a 0.01hp electric fan will not do anything but restrict airflow.

http://videos.streetfire.net/video/What-electric-really-do-a_49072.htm
http://www.homemadeturbo.com/tech_projects/el_blower/index.html
http://reviews.ebay.com/Electric-superchargers_W0QQugidZ10000000001006764

Again, with this video they only measure airflow/wind speed, NOT if it can make pressure on the engine.

You can either move a lot of air at low pressure OR compress a little bit of air at high pressure relatively cheaply. If you want both, it will cost HP. Just go look at the difference between an air compressor big enough to supply a professional repair shop and one sized for your average home garage.

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1984 300TD

Since I have seen no tests performed in the amount of pressure any of these make and no real world unbiased testing on actual installed units on a MB diesel, the jury is out and all views are conjecture as to the results of installing one of them on our engines IMHO. I personally think the effect of the more expensive units may surprise some of the doubters.

I think that it really takes some horsepower to move the amount of air at the required pressure to make a difference. Since the power needed is so distant from the amount offered by the electric fans, that's why I believe that no one has bothered to even hook one up to test.

Thinking off the top of my head, I believe it would require something on the order of a truck starter motor hooked to a Vortech or Eaton supercharger to actually have an effect. I guess an electric supercharger would solve some packaging problems but at the cost of quite a bit more weight.

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-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

Incorrect. Simple physics and common sense disproves their effectiveness without the need for testing. A $20 squirrel cage or bilge blower cannot produce any kind of boost pressure.

Spend a few hundred dollars on a high power one like "Force Flow" I linked to and you might get 1psi out of it on a 3.0L engine. Thats an extremely poor value that won't even make up for altitude difference in most places. In addition, the unit consumes 60+amps of power which puts a significant load on the engine and nullifies any small advantage that 1psi might have made anyways.

An actual electric supercharger is going to look something like this, have about 200lbs of batteries to go with it and not be able to run any longer than 30seconds at a time.

that thing sounds like dam.n. coffee grinder. . .

__________________
". . .back before accountants designed cars"

-Current Stable-
'78 MB 450SL-C 107.024.12.020783 #3840 <Kayleen>
'85 FORD F250 6.9L Diesel <Allison>
'98 Lexus ES300 <Rachel>
Long Gone...
'74 Chevy G10...........................'99 GMC Yukon 4X4
'83 Chevy Suburban 6.2 diesel .....'99 SAAB 9-5
'90 Mitsubishi Eclipse GS............. '01 Chevy Tahoe
'98 Nissan Altima .......................'02 MB ML320
'88 Chevy Suburban V2500 4X4 6.2 diesel

uh, you can get the mechanical ones for like $60..

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99 E300 Turbodiesel 100k

Those two highlighted words imply conjecture. Simple physics used to say bumblebees can't fly either. For the average owner/reader here they will not do anything AFAIK, but until it's tested real world one cannot come a hard and fast conclusion. I'm a "actual knowledge" type- and no one has actual knowledge on these.

It has been tested in the real world. 100% scam. Complete waste of money. Totally worthless.
They. Don't. Work.

There are people willing, no- dumb enough, to pay $375 for a $25 squirrel cage HVAC/bilge blower on eBay!
http://cgi.ebay.com/ebaymotors/MIMO-USA-ULTIMATE-ELECTRIC-TURBOCHARGER-SUPERCHARGER_W0QQitemZ260287846473

Perfect... please post the results of testing on a MB diesel (or something very close to) and we can lay this to rest.

No need to with some common sense and very basic science. Lacking that, go waste some money on one yourself and tell us how it works out.

Minor positive pressure can help overcome the bad head flow design. especially on a n/a engine.

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Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac?

As long as they would add one additional commandment for you to keep thy religion to thyself.
George Carlin (Wonder where he is now..)

1981 240d (engine donor 1983 240d) recently rebuilt engine hurray! - No more.. fought a tree and the tree won.

pearl black 1983 240d 4speed (Converted!@$$%) atleast the tranny was rebuilt.

In that case they would be far better off getting a used 300D turbo set for half what one of those scams cost.