General Tech Ask model specific questions in the appropriate category below. All other general questions within.

compression test

Thread Tools
 
Search this Thread
 
Old Feb 24, 2008 | 12:19 PM
  #1  
lexy's Avatar
lexy
Thread Starter
3rd Gear Member
 
Joined: Jun 2005
Posts: 801
From: A town
Default compression test

hey checked my cylinder compression test, It ranged from 110 min and 125 max. Is that good? Did it on a totally cold engine.
Old Feb 25, 2008 | 01:04 AM
  #2  
lexy's Avatar
lexy
Thread Starter
3rd Gear Member
 
Joined: Jun 2005
Posts: 801
From: A town
Default RE: compression ratio

Anybody?
Old Feb 25, 2008 | 07:44 PM
  #3  
blstoff's Avatar
blstoff
2nd Gear Member
 
Joined: Aug 2006
Posts: 492
From: MD
Default RE: compression ratio

compression ratio ??I think you mean you checked the cylinder compression . anyway , that sounds a littlelow to me . did you crank the engine over at least 4 compression strokes ??
Old Feb 25, 2008 | 07:47 PM
  #4  
89gt347's Avatar
89gt347
1st Gear Member
 
Joined: Jan 2008
Posts: 82
From:
Default RE: compression ratio

^^^ +1 on sounding low. I think it should be around 180 - 200 psi.
As stated above make sure it turns 4 compression strokes then take the reading.
Old Feb 25, 2008 | 09:40 PM
  #5  
ericdk5.0's Avatar
ericdk5.0
1st Gear Member
 
Joined: Feb 2008
Posts: 95
From: Florida
Default RE: compression ratio

And every cylinder should be within 10% percent of each other.
Old Feb 26, 2008 | 11:52 AM
  #6  
lexy's Avatar
lexy
Thread Starter
3rd Gear Member
 
Joined: Jun 2005
Posts: 801
From: A town
Default RE: compression ratio

The cobra is bored .20 over. got manley pistons and rods. I don't know if that has anything to do with it. Also when i checked the car was cold. Meaning i haven't driven it at all. Yeah i did do 4 strokes, or till the needle stopped moving.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
baddog671
Archive - Parts For Sale
20
Jul 26, 2016 01:20 PM
uedlose
The Racers Bench
4
Oct 1, 2015 08:31 PM
AMAlexLazarus
AmericanMuscle.com
0
Oct 1, 2015 09:21 AM
tj@steeda
Florida Regional Chapter
0
Sep 30, 2015 08:04 PM
MustangForums Editor
GT350 S550 Tech
1
Sep 29, 2015 03:29 PM




All times are GMT -5. The time now is 07:19 AM.