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TheFuzz89
Joined: 16 May 2006
Posts: 50
Location: Grand Rapids, MI 49316
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 Posted: Fri Oct 27, 2006 12:15 pm Post subject: Leaf Blower Air Intake? |
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Haha... this sounded ridiculous at first, but when thinking about it, it might work 
A buddy of mine was telling me yesterday he saw an article about someone who mounted an electric leaf blower to their air intake and saw significant power increases. They ran the dyno and got almost an extra 50 hp (supposidly). I believe he sad it was on like a late 80's model Mustang.
I tried a seach for it and came up with a few other forums but no solid info.
Has anyone else heard of this, or any other similar, cheap ways to "supercharge" a car?
... Humor me
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1977 Porsche 924 |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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JB 924
Joined: 03 Apr 2006
Posts: 606
Location: Hessen, Germany
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| Posted: Fri Oct 27, 2006 12:54 pm Post subject: |
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I actually bought these plans a while back when I thought tuned Japanese cars were cool.
http://www.horsepowermods.com/
Some say that it might recstrict airflow.
I saw a car on cardomain once. I think it was a Cirtoen, and the guy put 2 electric superchargers on it, and supposedly went from 0- 60 in 14 seconds, down to 7. Kind of an expensive experiment, though. |
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Keaton
Joined: 02 Jan 2006
Posts: 261
Location: 85202
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| Posted: Fri Oct 27, 2006 5:55 pm Post subject: |
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| JB 924 wrote: | | I actually bought these plans a while back when I thought tuned Japanese cars were cool. |
hey can you email me the plans if you still have them, i think it would be funn to toy with it, my 91 jetta has around 350,000 mi and its on its way out, this might help it along  |
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moone924
Joined: 05 Feb 2003
Posts: 868
Location: Douglas Wyoming
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| Posted: Sat Oct 28, 2006 1:29 am Post subject: |
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You can hook the shroud to heater box tubes on a air-cooled VW to the carburetor and pick up 10HP on a stock engine. Not a good idea though as the stock Solex can't handle forced induction without being o-ringed. Not that this has anything to do with the 924.
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Ryan Moone
Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time. |
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TheFuzz89
Joined: 16 May 2006
Posts: 50
Location: Grand Rapids, MI 49316
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| Posted: Sat Oct 28, 2006 7:08 am Post subject: |
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so in theory it could work? but do to alternator restrictions and not enough power... its just a waste of time and money
thanks again khal
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1977 Porsche 924 |
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JB 924
Joined: 03 Apr 2006
Posts: 606
Location: Hessen, Germany
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| Posted: Sat Oct 28, 2006 1:20 pm Post subject: |
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| Keaton, I still got those plans. I'll send them to you, just give me a while to find them. Not sure where I got them. Tell me if it worked! |
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macBdog
Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia
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| Posted: Sun Oct 29, 2006 9:11 am Post subject: |
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I think leaf blowers and electric superchargers are a Bad Idea. Here are my reasons:
1) The forced induction will only be operating for a short period of time. If its good (unlikely), youll want to run it all the time leading you to a proper method of forced induction ie turbo or supercharging.... or both!
2) Most "electric RAM air supercharger" type of things sell themselves on CFM of airflow. Which has almost nothing to do with boost pressure. Do the numbers on the energy required to compress air and you will see that a proper electric supercharger requires multiple batteries and large beefy motors to work effectivly.
3) If you have to go to the trouble of mounting extra batteries and large electric motors in your car, why not just bolt on a turbo? Some would argue its free power because you are harnessing your exhaust gasses. If you don't like turbo charging because of the lag then get a supercharger. If you are worried about losing horses from driving the supercharger then turn up the boost or GTFO!
Don't get me wrong, experimentation is great but if you are fitting one to make your car faster, its a waste of time.
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1979 931 with a 350 chev
1973 911E with EFI
| p-talk wrote: | I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways  |
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Stampedetrail
Joined: 29 May 2005
Posts: 274
Location: Fairbanks, Alaska
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| Posted: Mon Oct 30, 2006 5:01 pm Post subject: |
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| macBdog wrote: | I think leaf blowers and electric superchargers are a Bad Idea. Here are my reasons:
1) The forced induction will only be operating for a short period of time. If its good (unlikely), youll want to run it all the time leading you to a proper method of forced induction ie turbo or supercharging.... or both!
2) Most "electric RAM air supercharger" type of things sell themselves on CFM of airflow. Which has almost nothing to do with boost pressure. Do the numbers on the energy required to compress air and you will see that a proper electric supercharger requires multiple batteries and large beefy motors to work effectivly.
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Not to jump on this bandwagon, but I couldn't help but wondering what about storing air in a tank, and letting it go at the proper time to create boost for a brief period?
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1977.5 924 "Martini" head / New Old Stock rebuild
1985.5 944 Why? Because I can. |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Mon Oct 30, 2006 5:20 pm Post subject: |
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| Stampedetrail wrote: | | ...what about storing air in a tank, and letting it go at the proper time to create boost for a brief period? |
Why not just use NOS?
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'80 924 Turbo |
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JSilverman
Joined: 16 May 2006
Posts: 93
Location: Burke, VA
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macBdog
Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia
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| Posted: Tue Oct 31, 2006 9:36 am Post subject: |
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| Stampedetrail wrote: | | Not to jump on this bandwagon, but I couldn't help but wondering what about storing air in a tank, and letting it go at the proper time to create boost for a brief period? |
This would work. But what happens if a second person wants to drag race you at the traffic lights? You'll have to pull into a service station and pump up your air tank. Plus you won't be able to run a suitable cam because your car will only be on boost in the high rev range SOME of the time. Youd also have to turn fuel enrichment on and off depending on if you were running the compressed air. You could run a solenoid off the air tank to a relay to trigger your second cam profile vtec style and tell your computer to run a richer profile.
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1979 931 with a 350 chev
1973 911E with EFI
| p-talk wrote: | | I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways |
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Khal
Joined: 26 Sep 2003
Posts: 4872
Location: Sunny and lovely interior BC, Canada
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| Posted: Tue Oct 31, 2006 5:11 pm Post subject: |
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| macBdog wrote: | | This would work. |
Really? I wouldn't have thought so.
I'm also a little skeptical of that leaf blower video... I would've thought the engine could suck more air at full rev's than the leaf blower could put out?
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'80 924 Turbo |
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Stampedetrail
Joined: 29 May 2005
Posts: 274
Location: Fairbanks, Alaska
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| Posted: Tue Oct 31, 2006 6:52 pm Post subject: |
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| macBdog wrote: | | Stampedetrail wrote: | | Not to jump on this bandwagon, but I couldn't help but wondering what about storing air in a tank, and letting it go at the proper time to create boost for a brief period? |
This would work. But what happens if a second person wants to drag race you at the traffic lights? You'll have to pull into a service station and pump up your air tank. Plus you won't be able to run a suitable cam because your car will only be on boost in the high rev range SOME of the time. Youd also have to turn fuel enrichment on and off depending on if you were running the compressed air. You could run a solenoid off the air tank to a relay to trigger your second cam profile vtec style and tell your computer to run a richer profile. |
I don't think you'd necessarily need a service station to create high pressures in a tank, just run an intermittant air pump off the electrical system or belt drive. There's already an "air pump" in the system; so long as it doesn't pump up the tank all the time (robbing power @ high pressure obviously) i.e. an off switch or some kind of pressure controlled diverter valve, maybe.
The mixture part of the problem is very difficult, but there's already a setup for enriching the mixture (CSV & TTS) so perhaps it could be accomplished by controlling the CSV?
| Quote: | | Why not just use NOS? |
I don't like NOS.
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1977.5 924 "Martini" head / New Old Stock rebuild
1985.5 944 Why? Because I can. |
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macBdog
Joined: 16 Aug 2004
Posts: 1111
Location: Brisbane, Australia
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| Posted: Wed Nov 01, 2006 7:56 am Post subject: |
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| Khal wrote: | | Really? I wouldn't have thought so. |
Take a look at the compressor figures for the stock 931 turbo, you can compare them to a shop air compressor. Thing is that air compressors store way more air pressure in the tank than is required but let it out of the tank at a slower rate. So a turbo will flow ~200CFM @ 1.0 bar whereas an airtank will flow 10CFM @ 10 bar. You would need a large air tank and a high flow regulator to get the required flow and pressure from an air tank for a SHORT period of time. It would be alot like NOS, hit a switch, get some boost then go refill again. Except you can store alot more nitrous in the tank because of the liquid -> gas conversion.
| Stampedetrail wrote: | | There's already an "air pump" in the system; so long as it doesn't pump up the tank all the time (robbing power @ high pressure obviously) i.e. an off switch or some kind of pressure controlled diverter valve, maybe. |
The air pump in the 924 NA hasnt nearly enough balls to compress air into a tank. Ever tried pumping up a truck tyre with a bike pump? Neither have I but apparantly all that happens is the pump gets hot, the seals blow and you get a sore arm. Basically any air pump that has enough balls to compress enough air will require a ballsy energy source. Actually.. heres what could work - drive an air compressor off the crank. Hmm but youd have to have some system for bleeding off air because it would increase its output at WOT and overfill your air tank. Why not feed the output of the compressor directly into the engine and bleed off excess air... this sounds like a great idea.
| Stampedetrail wrote: | | I don't like NOS. |
The more you think about a cheap and easy method of increasing your performance, the more you will like NOS. Its dangerous yea but so is any kind of performance upgrade where you can just "turn it up dude!".
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1979 931 with a 350 chev
1973 911E with EFI
| p-talk wrote: | | I'm still convinced the word 'Porsche' makes people crazy in all kinds of ways |
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924 FAQ (Technical)
