why is a vacuum pump needed with a 5 stage dry sump pump bbc

Old 06-25-2008, 07:26 PM
  #1  
badbug3
Member
JUNIOR BUILDER
Thread Starter
 
Join Date: Jan 2004
Posts: 77
Default why is a vacuum pump needed with a 5 stage dry sump pump bbc

i see a lot of dry sump engines with a separate vacuum pump. Why is that? Why wont 4 scavange outlets create enough vacuum in a bbc engine?
badbug3 is offline  
Old 06-25-2008, 10:45 PM
  #2  
edvancedengines
Senior Member
DYNO OPERATOR
 
Join Date: Feb 2006
Location: VA Hospital, Dallas, Tx (214 302 1924) cell-972-464-7400
Posts: 540
Default

nope surprises me too and surprises customers when I tell them to add vacuum pump system.

with big motor and 4 stage suction you may get a negative atmospheic pressure in crank case of 5 to 6 inches. not enough to help anything except oil return and it helps a bunch if you have one stage plubmed for drain back from on top. . ed
edvancedengines is offline  
Old Yesterday, 05:41 AM
  #3  
Fdqwasdo
Junior Member
SHOW GUEST
 
Join Date: Sep 2026
Posts: 1
Default

Intéressant ! La gestion de la pression dans le carter et le retour d’huile peuvent vraiment faire la différence sur une préparation moteur. Il faut toutefois adapter le système au montage et vérifier les mesures réelles. Pour changer d’ambiance après la mécanique, certains apprécient aussi les jeux de ici casino en ligne
Fdqwasdo is offline  
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


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -