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Scorpio
Joined: 05 Jul 2007
Posts: 1957
Location: Brisbane, Australia
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924aussie
Joined: 02 Feb 2006
Posts: 1009
Location: Chinchilla Queensland Australia
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 Posted: Mon Dec 31, 2007 12:51 am Post subject: |
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| Quote: | | Realm Enterprises, sent to Force Flow, P.O Box 343, Mooloolaba, QLD, |
the special is only for now ... maybe they are using the gale force winds they are currently having on the coast to power it 
I have a 12 volt hair dryer in the motorhome that I could plumb into your 924 for you 
Seriously I think if you went to an electricle device you may have to start looking at a duel battery setup.
Alan
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green 924 .. 1980 rego 924PSH
1998 Mopar Neon ... sick
2003 Challenger / Montery 4WD
1995 Hyundai Scoupe ... sold
1998 Nissan Silvia ... sons back from OS he has taken it
BIG BLOODY MOTORHOME 300zx Sold
1980 Fire truck Sold |
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Rich H
Joined: 10 Jun 2007
Posts: 2665
Location: Preston, Lancs, UK
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| Posted: Mon Dec 31, 2007 2:38 am Post subject: |
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Mate, do the maths before even looking at buying one...
A supercharger takes tens or hundreds of BHP to drive yet these fans take only a few amps? regardless of the claims the numbers do not stack up. If they are so good why do no manufacturers offer them?
There is a guy in the UK 924 forums who has one fitted who claims that it makes a difference, I've seen it and it sounds impressive, but again that runs off a 40 amp fuse (12V x 40 Amps = 480W = 0.64 hp) 0.64 hp will not give significant increase in manifold pressure (which is what you are after)
In addition some of the claims are irrelevant, CFM claims are pointless, wonderful your fan can shift 900 CFM! well done. Not bad if you want to ventalate your basement or boat bilge, useless if you want it at anything other than atmospheric pressure.
There are some systems that can provide serious boost, but they run for a few seconds, have loads of batteries and provide significant boost. But they cost a fortune, need a professional install and weigh plenty. Get a real blower, it'll give more power, be more reliable, be lighter and it will be cheaper!
Sorry about the rant but these thigs really wind me up!
Rich
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1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Mon Dec 31, 2007 9:49 am Post subject: |
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I've seen a video where a guy hooked a leaf blower up to his car and hit the button.
Looked like the engine was about to jump out of the car.
Some may have some merit but a big electrical power drain.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance |
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poorsha924
Joined: 13 Nov 2007
Posts: 143
Location: Kansas City Mo
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| Posted: Mon Dec 31, 2007 10:20 am Post subject: electric supercharger |
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I have to agree with the other members looks like nothing more than a fancy air intake these kinda of snake oil ads torque me up tool!  like Rich expressed They should have listed it as a "eletric seperator" cause it seperates you from your money don,t waste yours!
Poorsha924
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79 924S snailshell
audi big bore t-body
16" turbo wheels |
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Rich H
Joined: 10 Jun 2007
Posts: 2665
Location: Preston, Lancs, UK
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| Posted: Mon Dec 31, 2007 9:08 pm Post subject: |
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| Ozzie wrote: | I've seen a video where a guy hooked a leaf blower up to his car and hit the button.
Looked like the engine was about to jump out of the car.
Some may have some merit but a big electrical power drain. |
If the leaf blower was hooked up and not running it would obstruct the intake, once it is started the engine would run as it was designed to. Only reason I can think it would do that. Also a leaf blower is better as its capable of providing significant back pressure and airspeed. Neither of which can be described as CFM...
I'm happy to be proved wrong though! I would like to see before and after dyno plots, not just "fan off vs fan on" as a stationary fan offers significant obstruction to the airflow.
Rich
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1994 Lotus Esprit S4 - Work in progress...
1980 Porsche 924 S2 DITC Turbo - Original spec
1978 Homo-Sapiens - Tired spec
1953 Landrover S1 - Pensioner Spec |
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Peter_in_AU
Joined: 29 Jul 2001
Posts: 2743
Location: Sydney, Australia
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| Posted: Mon Dec 31, 2007 11:28 pm Post subject: |
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Snake oil.
As Rich says; do the math. Alternatively hit google.
If you still believe then I've got a slightly smoke-stained bridge you might also be interested in buying.
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1979 924 (Gone to a better place)
1974 Lotus 7 S4 "Big Valve" Twin-cam (waiting)
1982 924 (As featured on Wikipedia)
Learn to love your multimeter and may the search be with you |
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tuurbo
Joined: 08 Aug 2007
Posts: 1446
Location: East Windsor, New Jersey
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| Posted: Tue Jan 01, 2008 10:28 am Post subject: |
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They'd sound like,...hmm...a leaf blower? lol
I have enough bad sounds coming from my car.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock. |
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tuurbo
Joined: 08 Aug 2007
Posts: 1446
Location: East Windsor, New Jersey
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| Posted: Tue Jan 01, 2008 10:31 am Post subject: |
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Can you see the guy at the stop light? Pulls up in a 350 IROC and rolls down his window.
"Whaddya got in there? I got me a 350 Chebby wit a 11:1 compression"
"Oh yeah, well I got me a 924 with a weed shagger"
Vroom, vroom.
I shouldn't laugh. I tried VMax.  And MSD.
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1980 924 turbo, MSD, Meth. Inj, otherwise stock. |
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Ozzie
Joined: 12 Mar 2005
Posts: 4448
Location: Townsville, Qld. Australia
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| Posted: Tue Jan 01, 2008 12:52 pm Post subject: |
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http://www.youtube.com/watch?v=xwkSr60fk0g
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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RC
Joined: 25 Mar 2007
Posts: 2637
Location: Australia
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| Posted: Fri Jan 04, 2008 3:18 pm Post subject: |
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So Thomas Knight is now flogging eatons mated to starter motors? with a boot full of batteries! 
6 months ago when I checked out the site they were marketing a centrifugal one (well 1/2 a turbo actually) with a belt driven step up drive and starter motor, that looked remarkably identical to the hasslebro POS that was being pushed here. Recall a previous thread to that effect here and rennlist too I believe. The new one is even called an ESC... ring a bell?
Something sus about the whole concept actually IMO, not to mention engineering and laws of physics. Guess that as long as there are people looking for magic snake oil there will be snakes taking their money.
Use some common sense here, what is lighter and more efficient? A belt and 2 pulleys or a half cocked starter motor, 3 car batteries, control gear
and relays for switching massive current, and of course an alternator capable of recharging such a device.
Roger |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Fri Jan 04, 2008 4:15 pm Post subject: |
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| RC wrote: | | ...a boot full of batteries! |
Not strictly necessary with modern batteries (although there's more engineering in it than I'm qualified to comment on).
| RC wrote: | | ...the hasslebro POS that was being pushed here. Recall a previous thread to that effect here and rennlist too I believe. The new one is even called an ESC... ring a bell? |
Yes, the escapades of that mob left everyone here on the 'board a little sour, no doubt.
| RC wrote: | | Something sus about the whole concept actually IMO, not to mention engineering and laws of physics. Guess that as long as there are people looking for magic snake oil there will be snakes taking their money. |
Well, with modern electronics, batteries and electric motors, I have absolutely no doubt you could make it work. It may even work quite well... in short-ish bursts. Whether it's worth it over a simple and proven belt-driven supercharger is very much debatable.
(I'm setting aside the one I posted in the link and thinking only of using the latest and best in electrickery)
| RC wrote: | Use some common sense here, what is lighter and more efficient? A belt and 2 pulleys or a half cocked starter motor, 3 car batteries, control gear and relays for switching massive current, and of course an alternator capable of recharging such a device.
Roger |
Hmm... I suspect you're right about the traditional setup being lighter. And you could therefore argue that it's more efficient in certain terms. But if you're not drawing horsepower from the engine to drive the supercharger, it'd be an interesting excercise to see which is more efficient in absolute terms (again, assuming one were using the latest and best in electrickery). Then again, I myself always fall back to old argument that if it was that good, everyone would be using it!
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'80 924 Turbo |
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Rasta Monsta
Joined: 12 Jul 2006
Posts: 11733
Location: PacNW
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| Posted: Fri Jan 04, 2008 4:19 pm Post subject: |
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| Khal wrote: | | If it was that good, everyone would be using it! |
Ding ding ding, we have a winner!!
Not coming from any factories, not being run on the track, therefore horsepucky.
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Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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Scorpio
Joined: 05 Jul 2007
Posts: 1957
Location: Brisbane, Australia
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| Posted: Fri Jan 04, 2008 5:56 pm Post subject: |
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| Quote: | If it was that good, everyone would be using it!
Ding ding ding, we have a winner!!
Not coming from any factories, not being run on the track, therefore horsepucky. |
To invent, you need a good imagination and a pile of junk.
Thomas A. Edison (1847 - 1931)
It seems that most people here see it as a pile of junk, and it may be so. but perhaps theres a few imaginative people who see it as an idea that may have merit. Just because it doesnt work all that effeciently now doesnt mean the idea should be thrown away.
Ive got my conventional turbo, but to limit your thinking and quell an idea because it isnt being mass produced or used on the track YET isnt that a bit close minded?
Yes it is understood that for every 1000 inventions 1 may have merrit.. but what annoys me is not that people criticize an idea (as critical thinking is the basis for develoment) BUT that people criticize an idea on the basis that because it isnt currently mass produced by so called 'Factories' that it is 'snake oil or horsepucky'.
I guess their are those that FOLLOW current technology and those that seek to DEVELOP future technologies.
Each to their own
(OK venting time over..woooooosssaaaa)
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT
Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!! |
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