Notices

Boost

Old 01-14-2010, 10:15 PM
  #1  
Registered
Thread Starter
 
Join Date: Mar 2007
Location: Lake Dallas, TX
Posts: 1,087
Likes: 0
Received 0 Likes on 0 Posts
Default Boost

Can someone take the time to explain Boost, both via a Supercharger and Turbo. My understanding which is very neanderthal, it's the amount of air being pushed into the cylinder. But I'm a little confused in that I've seen "boost" switches to increase or decrease the amount. Wouldn't the fuel amount need to be adjusted too? Or is that done via ECM?

thanx
bert4332 is offline  
Old 01-14-2010, 11:17 PM
  #2  
Banned
 
Join Date: Jan 2010
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Default

You could ask a number of members on here to help further your knowledge. Brad Zastrow, Hot Pursuit, 40FlatDeck, many helpful members in the community
JollyJohnny is offline  
Old 01-15-2010, 01:18 AM
  #3  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,516
Received 1,782 Likes on 884 Posts
Default

I have never seen a "boost" switch
Griff is offline  
Old 01-15-2010, 03:13 AM
  #4  
Registered
 
Join Date: Nov 2003
Location: Lake Travis ,Texas
Posts: 2,295
Likes: 0
Received 2 Likes on 2 Posts
Default

Dont know if this helps but I will throw what little I know in here:
Boost is the measurement of resistance to airflow not the actual amount of air being "pushed". The harder it is to push thru the resistance the higher the boost reading.

Example: A blower that makes 10lbs of boost on a stock
motor with stock components will make probably only about 5lbs of boost if you put big heads,cam,intake and exhaust on the same setup because you have lowered the resistance to air flowing thru the entire engine.

another example: 5lbs of boost on a 502 big blocks requires almost twice as much air to be "pushed" than 5lbs of boost on a 350..
Take a turbo rated at 20lbs of boost off a a small engine like a 4cyl Import sportcar and put it on a 600" V8 and it may not even make boost because the engine requires more air than the unit can push.
CFM is a much better qualifier for a supercharger than boost.
HTRDLNCN is offline  
Old 01-15-2010, 08:13 AM
  #5  
Registered
 
Join Date: Jul 2001
Location: Michigan
Posts: 351
Received 37 Likes on 13 Posts
Default

Originally Posted by Griff
I have never seen a "boost" switch
I use one.
Attached Images  
check300 is offline  
Old 01-15-2010, 08:39 AM
  #6  
Platinum Member
Platinum Member
 
cougarman's Avatar
 
Join Date: Jan 2002
Posts: 2,898
Likes: 0
Received 53 Likes on 28 Posts
Default

cougarman is offline  
Old 01-15-2010, 12:27 PM
  #7  
Charter Member # 55
Charter Member
 
Griff's Avatar
 
Join Date: Oct 2000
Location: Omaha/LOTO
Posts: 19,516
Received 1,782 Likes on 884 Posts
Default

Originally Posted by check300
I use one.
So how does it work???????? I would guess some type of wastegate or pop off valve to relieve the extra boost????????
Griff is offline  
Old 01-15-2010, 12:54 PM
  #8  
Registered
 
Join Date: Sep 2007
Location: HUDSON RIVER and L.I. SOUND
Posts: 434
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Griff
So how does it work???????? I would guess some type of wastegate or pop off valve to relieve the extra boost????????
As far as I can tell Check 300 has the ECM pre-programed for differnent boost levels that are controled by how fast he is spinning the huffer via different pulley sizes. But thats just a guess ???
live wire is offline  
Old 01-15-2010, 01:06 PM
  #9  
Registered
 
Join Date: Jul 2008
Posts: 2,801
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by live wire
As far as I can tell Check 300 has the ECM pre-programed for differnent boost levels that are controled by how fast he is spinning the huffer via different pulley sizes. But thats just a guess ???
Not quite, thats likely a turbo app.

His deal is always making more boost than he is using, and the excess boost is electronically "bled" off.

This way you can regulate output, and adjust for fuel quality, and make a decisions between output level and component lifespan.

Mercs 6 and 700's bleed off more than they use as well but from a supercharged app. this is why they can deliver their rated (long story) power at any altitude or under any load condition.

Uncle Dave
Uncle Dave is offline  
Old 01-15-2010, 01:10 PM
  #10  
Registered
 
Join Date: Sep 2007
Location: HUDSON RIVER and L.I. SOUND
Posts: 434
Likes: 0
Received 0 Likes on 0 Posts
Default

He does have a turbo set-up .That sounds more realistic ...Thanks Uncle dave
live wire is offline  

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.