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Old 08-08-2010, 10:22 PM   #1
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compression

going to be installing a supercharger soon. just going to run a compression test first to see if everything is a "Go" what should i be looking for? from what i have read 120-120-120-120 is the ideal area/range.. I have a 2003 zx3 zetec with 112K


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Old 08-09-2010, 12:17 AM   #2
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Can be higher. You really want them all to be close. I think its within 10% or something like that of each other. I think mine was reading 160 across till I had the worn rings.
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Old 08-09-2010, 07:33 AM   #3
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going to be installing a supercharger soon. just going to run a compression test first to see if everything is a "Go" what should i be looking for? from what i have read 120-120-120-120 is the ideal area/range.. I have a 2003 zx3 zetec with 112K
you need a new gauge if you are getting that, mine was 195 across the board on a o4 zetec. Remember to hold the tb open too.
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Old 08-09-2010, 07:42 AM   #4
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ya, thats super low on compression, when i blew my motor, i still had 2 cyl at 135, and the others were at 60 and 75, i was running over 200.
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Old 08-09-2010, 10:01 AM   #5
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yeah it diffidently sounds like you have a problem with the gauge. if not, then something is up
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Old 08-09-2010, 10:26 AM   #6
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did you guys read the WHOLE thing??


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going to be installing a supercharger soon. just going to run a compression test first to see if everything is a "Go" what should i be looking for? from what i have read 120-120-120-120 is the ideal area/range.. I have a 2003 zx3 zetec with 112K
I have not ran a compression test yet, im asking what i should be looking for..
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Old 08-09-2010, 12:51 PM   #7
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haha I guess I misunderstood along with many others. I would expect something around 180psi maybe more maybe less. The main thing is to make sure they are all close to each other.
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Old 08-09-2010, 02:00 PM   #8
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Engine warm and tb open.
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Old 08-09-2010, 03:43 PM   #9
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^^ should be good
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Old 08-10-2010, 10:53 PM   #10
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ok so how long should i warm the engine? until the gauge gets warm (between cold and Hot) im guessing? lol then what? my cousin would know im sure, he did it to his drag car but i wanna make sure that its the same way to do a focus
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