It is currently Sun Feb 18, 2018 2:09 pm

Reply to topic  [ 3 posts ] 
 Sf110 int-ex flow difference 
Author Message

Joined: Tue Sep 13, 2016 1:12 am
Posts: 2
Hi all im a newbie woodduck lookin to pick the collective brains for an answer. I have a 110 yea sorry.....ok i have upgraded the motors and it has a pt black box with temp when i flow the test plate ie 5/16 & 1 7/8 hole on int mode with correction factor i got 152.9 cfm @10" flip the test plate over flow in ex mode 165.4 cfm @ 10". Is this an inherent problem with this style of bench? I feel that it is a bit of a difference but am i just being too pedantic? Any input would be appreciated.
Thanks scotty.

Fri Feb 24, 2017 4:31 am

Joined: Tue Sep 13, 2016 1:12 am
Posts: 2
Sorry ....forgot to mention leakage on tests was under 1 cfm on both sides so not a bench leakage problem.

Fri Feb 24, 2017 4:58 am
Site Admin

Joined: Fri Jan 08, 2010 3:35 pm
Posts: 1664
Location: Pennsylvania
Welcome to the Forum!

Seeing a difference in CFM between intake/exhaust is typical due to how the measuring orifice is "seeing" the airflow. The path the air is taking is not the same in intake/exhaust. That style flowbench is heating the air either after or before your test piece so temp has to be accounted for in the math to derive CFM


Who . . . me? I stayed at a Holiday in Express . . .

Fri Feb 24, 2017 7:24 am
Profile WWW
Display posts from previous:  Sort by  
Reply to topic   [ 3 posts ] 

Who is online

Users browsing this forum: No registered users and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software for PTF