Compression guage
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Post Fiend
Joined: Feb 2004
Posts: 5,378
Likes: 3
From: nebraska
Compression guage
Hey guys I was just curious how to use a compression guage. I need to check one cylinder out in my 460. Its missing an am trying to determine the problem. I need to be educated here on how to use it. I am not for sure if this is the right forum but i thought I would post it here to see. Hopefully somebody will reply with some info. Any tips or suggestion would be much appreciated. What should the lbs read for each cylinder. A quick response would really be helpful as i need to do this as quick as possible. If I have any other questions i will let you know. Thanks.
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
First, you never just check one cylinder (well I have but I checked the compression before and after every race, so if a plug looked bad I would check just one, but street motors are different). You need to compare the highest compression number to the lowest. A 15% difference between high and low is all that is acceptable. Now remove all plugs, lock the throttle Wide Open. Screw in compression gauge in and crank engine about 5 to 10 times, or until the the needle stops bouncing. Record number and then go through all the rest of the cylinder. Now check your numbers.
Post Fiend
Joined: Mar 2004
Posts: 6,056
Likes: 8
From: Union, Washington
Used to race up until 1994. First I raced cars, Ford from my 1956 Crown Victoria thru my several 428CJs. The I switched over to boats, the 2 stroke kind.
This
with this
Then this one
several others then lastly this one.
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with this
Then this one
several others then lastly this one.
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