The Subaru SVX World Network   SVX Network Forums
Live Chat!
SVX or Subaru Links
Old Lockers
Photo Post
How-To Documents
Message Archive
SVX Shop Search
IRC users:

Go Back   The Subaru SVX World Network > SVX Main Forums > Technical Q & A

Reply
 
Thread Tools Display Modes
  #46  
Old 01-08-2008, 03:06 PM
crazyhorse's Avatar
crazyhorse crazyhorse is offline
242,000 mi on oem trans
 
Join Date: Aug 2007
Location: Greeneville, TN
Posts: 1,111
Registered SVX
A couple things.

When you initially turn on the blower it will likely spike kW. It will also take a second or so to spool up. That will negate your "short burst". I read in here a 450cfm rating. That's not sufficient to feed 3.3 liters, for that you'll need around 550cfm.
I doubt the engine could breathe through the leaf blower, so you'll need an alternate inlet to supply air when the blower isn't running.

I'm in no way trying to be a wet blanket, but this isn't going to net you any tangible gains. In fact, worst case, it will disintegrate, feeding your engine bits of plastic, and aluminum. That would be a fatal case of food poisoning, and you won't like that the EG33 pukes up.
__________________
[SIGPIC]http://www.subaru-svx.net/forum/image.php?type=sigpic&userid=5569&dateline=1207440 507[/SIGPIC]
Naught but by the grace of God
"42"
Current Stable By Age:
'89 Subaru XT6 Silver "Audrey" as in Hepburn
'96 SVX LSi #767Brilliant Red "Lil Red" Now on the front burner. Looking for a totalled, but running parts car.
Reply With Quote
  #47  
Old 01-08-2008, 03:44 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
the blade its self will most likely not disinigrate do to that it has a function of being a vacum for yard trimmings, therefore it is probably stronger than other blades, it also has a duel design, there are blades on both sides of the wheel shaped blade...
Reply With Quote
  #48  
Old 01-08-2008, 03:53 PM
Trevor's Avatar
Trevor Trevor is offline
Registered User
 
Join Date: Feb 2002
Location: Auckland, New Zealand
Posts: 5,223
Registered SVX
Quote:
Originally Posted by crazyhorse View Post

I read in here a 450cfm rating. That's not sufficient to feed 3.3 liters, for that you'll need around 550cfm.

.
At what RPM have you calculated the quoted air consumption, remembering that a four stroke is involved? Has a final positive pressure been allowed for and if so how much? This latter factor will be the ultimate decider, otherwise all is for nothing.
__________________
Trevor, New Zealand.

As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit!
Reply With Quote
  #49  
Old 01-08-2008, 03:54 PM
LetItSnow's Avatar
LetItSnow LetItSnow is offline
Still Cant' Say the Z-Word
 
Join Date: Mar 2007
Location: Syracuse, NY
Posts: 2,338
Send a message via AIM to LetItSnow
Registered SVX
Have you calculated how many amps you're going to need to feed that blower?

Please?
__________________
Disclaimer: The above post is on the internet.
Reply With Quote
  #50  
Old 01-08-2008, 05:30 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
ok, i have setup a system where i can see how much psi my blower gives, right now its at 2 psi, i am using a real boost gauge btw... well anyways, the air that is being pressurized is coming back out the way the air is coming in... im going to do some modding to the blower case right now.
Reply With Quote
  #51  
Old 01-08-2008, 05:51 PM
Wikedjuggalo's Avatar
Wikedjuggalo Wikedjuggalo is offline
Rebuilding
 
Join Date: Aug 2007
Location: Salem, Oregon
Posts: 2,419
Registered SVX
There's a funny video someone posted somewhere about a redneck Booster or something. It was really funny and they used a leaf Blower
__________________
1994 SVX L - FWD Barcelona Red 190K miles ~ SOLD

1994 SVX LS - 5spd AWD Emerald Green 202k miles PWR Radiator, HID 5000k, New paint job with issues, 17" STI BBS wheels, converted to 5spd AWD from FWD. Purchased from SVXyGirl 2/20/09 -- Undergoing complete rebuild
1993 Justy 4wd 5door- Teal of sorts , beater.
2008 OBXT Newport Pearl 65k miles
Reply With Quote
  #52  
Old 01-08-2008, 06:10 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
ive now gotten near 3 psi since doing a little modding...
Reply With Quote
  #53  
Old 01-08-2008, 07:03 PM
LetItSnow's Avatar
LetItSnow LetItSnow is offline
Still Cant' Say the Z-Word
 
Join Date: Mar 2007
Location: Syracuse, NY
Posts: 2,338
Send a message via AIM to LetItSnow
Registered SVX
What's powering the fan during this testing? If it's AC from the wall, that doesn't count!
__________________
Disclaimer: The above post is on the internet.
Reply With Quote
  #54  
Old 01-08-2008, 07:06 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
aww!!!! i think someone is getting close to prooving people wrong !!!! The more you tell me ill fail the more ill try to make it work so go ahead and tell me its a failure...
Reply With Quote
  #55  
Old 01-08-2008, 08:22 PM
LetItSnow's Avatar
LetItSnow LetItSnow is offline
Still Cant' Say the Z-Word
 
Join Date: Mar 2007
Location: Syracuse, NY
Posts: 2,338
Send a message via AIM to LetItSnow
Registered SVX
Wait, was it plugged into the wall or no?
__________________
Disclaimer: The above post is on the internet.
Reply With Quote
  #56  
Old 01-08-2008, 08:25 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
yes... plugged into the wall , but im not working on the energy part of it right now, just trying to work on the building psi part
Reply With Quote
  #57  
Old 01-08-2008, 09:14 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
ahahaha, im now to 4 psi!!! woot!!! i solved the problem of the air backing up and coming out the inlet...
Reply With Quote
  #58  
Old 01-08-2008, 09:47 PM
Trevor's Avatar
Trevor Trevor is offline
Registered User
 
Join Date: Feb 2002
Location: Auckland, New Zealand
Posts: 5,223
Registered SVX
Quote:
Originally Posted by cruisen_15 View Post
yes... plugged into the wall , but im not working on the energy part of it right now, just trying to work on the building psi part
Understand that any restriction in the air flow will develop pressure behind the point of restriction. A nozzle will provide this on the original set up and will fix the ratio of airflow and pressure for best results blowing leaves.

When the engine is drawing air this will cause a depression in the inlet, increasing with RPM. The blower must deliver more air than the engine draws in so as to develop pressure within the inlet tract.

It must be appreciated that static tests without the engine are useless, other than possibly providing figures for what would be complicated calculations. You must work on the basis of flow resistance, volume of air moved and pressure. Much as you would use resistance, amps and volts in an electrical problem.

You can not design/build for pressure, without considering all three factors.
__________________
Trevor, New Zealand.

As a child, on cold mornings I gladly stood in cowpats to warm my bare feet, but I detest bull$hit!
Reply With Quote
  #59  
Old 01-08-2008, 11:29 PM
cruisen_15's Avatar
cruisen_15 cruisen_15 is offline
Registered User
 
Join Date: Sep 2007
Location: washington
Posts: 719
ok i made a video, sorry its so dark but u get the point... theres a cone filter on it btw, pretty redneck right here

http://youtube.com/watch?v=XYJgJONAMas
Reply With Quote
  #60  
Old 01-09-2008, 03:30 AM
JaySVX's Avatar
JaySVX JaySVX is offline
Bad decisions effect everybody
 
Join Date: Mar 2007
Location: Collegeville, PA
Posts: 1,902
Send a message via AIM to JaySVX Send a message via Yahoo to JaySVX
The way that normal turbochargers and superchargers work, is they increase pressure as engine speed increases, at the same time also increasing airflow. Can your setup maintain 4psi at idle? Then, as engine speed increases, and airflow increases, increase, or at least be able to maintain 4psi, or will it drop since the engine is consuming more air? Your electric supercharger will have to be effectively scaled to match the engine speed, the same way a supercharger or turbocharger would, else you're psi is going to drop to 0psi and potentially negative psi once the engine is drawing in enough air.
__________________
*No SVX at the moment...*
1987 Winnebago Elandan 35'
2001 Yamaha Roadstar 1600
2004 Ford Excursion Eddie Bauer, 6.0litre Power Stroke Diesel - Daily Driver.


Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well-preserved body, but rather to skid in sideways, scotch in one hand, body thoroughly used up, totally worn out and screaming HOOOOYA !!!!!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 02:43 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
© 2001-2015 SVX World Network
(208)-906-1122