Pressure / Vacuum Readings to Locate Bottlenecks? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

Reply
 
 
 
Thread Tools Search this Thread
Old 07-18-2007, 03:44 PM   #1
Senior Member
Posts like a 4 Banger
Thread Starter
 
Join Date: Jul 2006
Posts: 127
Thanks: 0
Thanked 0 Times in 0 Posts
2.3 Turbocoupe is on a distinguished road
Default Pressure / Vacuum Readings to Locate Bottlenecks?

The recent discussion on looking for improvements for the GXP airbox got me thinking about using a more scientific method for locating bottlenecks in the inlet tract. My thought is that taking vacuum / pressure measurements at various points in the inlet tract might help to identify the areas with the most potential for improvement.

It seems to me this could work for N/A or boosted applications – for NA you’d be watching vacuum readings, on boosted apps you’d be looking for a drop in boost pressure.

For example, if a vacuum reading on a GXP (N/A) was taken between the airbox and the MAF, and the vacuum reading was very low, my thought is that there would not be much to be gained with airbox mods. Of course this would require taking the vacuum reading on a WOT pull to redline. Then next place to check might be immediately after the MAF to see if the MAF is a significant restriction.

Something like this might be helpful with tapping into inlet tubes or plastic airboxes.

One concern I with this method is getting an accurate reading. I have to wonder if the air velocity inside the intake tract might cause an inaccurate reading.

Any thoughts? Has anyone done this or heard of it being done?
2.3 Turbocoupe is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
P0716 code - speed sensor - can't locate latitud_rt 2000-2005 11 04-15-2009 03:05 PM
Help Locate (4-28-08) David Letterman 'Part 2' video OLBlueEyesBonne Lounge 0 05-01-2008 12:51 AM
AC Pressure readings dandyd 1987-1991 0 06-09-2007 01:40 PM
Help locate stolen Aurora(a complete loss now) Custom88 Lounge 24 01-11-2007 04:42 PM
Hard starting, hesitation (with fuel pressure readings!) F14CRAZY 1992-1999 2 06-30-2006 03:45 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:58 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.