MustangForums.com

5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Compression Test

   
Old 05-04-2006, 10:45 AM
  #1  
raptorkingcobra
1st Gear Member
Thread Starter
 
raptorkingcobra's Avatar
 
Join Date: Apr 2006
Location:
Posts: 120
Default Compression Test
I am planning on running a compression test on the GT this weekend, does anyone know what the stock compression should be on these cylinders? thanks
raptorkingcobra is offline  
Reply
Old 05-04-2006, 05:01 PM
  #2  
raptorkingcobra
1st Gear Member
Thread Starter
 
raptorkingcobra's Avatar
 
Join Date: Apr 2006
Location:
Posts: 120
Default RE: Compression Test
Wow no responses yet?
raptorkingcobra is offline  
Reply
Old 05-04-2006, 05:08 PM
  #3  
Dirty Sanchez
3rd Gear Member
 
Dirty Sanchez's Avatar
 
Join Date: Jan 2006
Location: Kentucky
Posts: 775
Default RE: Compression Test
Hmmm, I'm wanting to say it should be around 150psi, maybe a bit more. Going on memory here, so don't hold me to it.
Dirty Sanchez is offline  
Reply
Old 05-04-2006, 06:38 PM
  #4  
kartracer55
3rd Gear Member
 
kartracer55's Avatar
 
Join Date: Aug 2005
Location:
Posts: 519
Default RE: Compression Test
No, but you should look for withing 20lbs between them.... Post up the results, then redo the test after squirting a little oil in the cylinder to try and seal up the rings for the test.
kartracer55 is offline  
Reply
Old 05-04-2006, 06:44 PM
  #5  
Tims 88GT
6th Gear Member
 
Tims 88GT's Avatar
 
Join Date: Jan 2005
Location:
Posts: 7,657
Default RE: Compression Test
150 sounds right
Tims 88GT is offline  
Reply
Old 05-04-2006, 07:31 PM
  #6  
settled4automatic
3rd Gear Member
 
settled4automatic's Avatar
 
Join Date: Jun 2004
Location:
Posts: 613
Default RE: Compression Test

ORIGINAL: kartracer55

No, but you should look for withing 20lbs between them.... Post up the results, then redo the test after squirting a little oil in the cylinder to try and seal up the rings for the test.
i was tought to compare by % --- more than 20% difference is considered "bad"
settled4automatic is offline  
Reply
Old 05-04-2006, 07:51 PM
  #7  
Liquid_02
4th Gear Member
 
Liquid_02's Avatar
 
Join Date: May 2005
Location:
Posts: 1,267
Default RE: Compression Test
I got 160 all around when i did mine so about that
Liquid_02 is offline  
Reply
Old 05-05-2006, 12:16 AM
  #8  
Mikes Stang
1st Gear Member
 
Mikes Stang's Avatar
 
Join Date: Apr 2006
Location:
Posts: 87
Default RE: Compression Test

ORIGINAL: Liquid_02

I got 160 all around when i did mine so about that
That's about what I got on my 1989 donor car, too. I've always heard about 150 was normal. Definitely want to see consistency in all your numbers.
Mikes Stang is offline  
Reply
Old 05-05-2006, 12:35 AM
  #9  
Dirty Sanchez
3rd Gear Member
 
Dirty Sanchez's Avatar
 
Join Date: Jan 2006
Location: Kentucky
Posts: 775
Default RE: Compression Test
Sweet, I was right. Not bad considering I just pulled that number out of my ***!!!









j/k, checked mine awhile back, and they were all right around 150psi or so.
Dirty Sanchez is offline  
Reply
Old 05-05-2006, 10:44 AM
  #10  
raptorkingcobra
1st Gear Member
Thread Starter
 
raptorkingcobra's Avatar
 
Join Date: Apr 2006
Location:
Posts: 120
Default RE: Compression Test
awesome thanks guys, I am gonna check it this weekend when I am installing new plugs, I will let you know the results!
raptorkingcobra is offline  
Reply

Thread Tools
Search this Thread
Search this Thread:

Advanced Search

Advanced Search
Quick Reply: Compression Test


Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 02:10 AM.