Just ran a compression test...
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Re: Just ran a compression test... (lohatch)
i think they're suppose to be at around 240 psi, but consistency was what i was looking for.
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Re: Just ran a compression test... (B20ZVTECHB)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20ZVTECHB »</TD></TR><TR><TD CLASS="quote">i did mine the other day and they were all at 150 but my car still rips hard is this bad?</TD></TR></TABLE>
Did you remember to disable the fuel system before you did the test??
If not, disable it and do the test again...your numbers will come up.
Did you remember to disable the fuel system before you did the test??
If not, disable it and do the test again...your numbers will come up.
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Re: Just ran a compression test... (00Red_SiR)
if you don't disable the fuel system, it would cause the #s to be lower? i just did my motor on sat and it came out to be 180 across (+/- 2) with the fuel system on. If your motor has a higher compression than stock, the number should come out to be higher than stock? or lower? forgive me for my noob question
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Re: Just ran a compression test... (Espec_rep)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Espec_rep »</TD></TR><TR><TD CLASS="quote">if you don't disable the fuel system, it would cause the #s to be lower? i just did my motor on sat and it came out to be 180 across (+/- 2) with the fuel system on. If your motor has a higher compression than stock, the number should come out to be higher than stock? or lower? forgive me for my noob question </TD></TR></TABLE>
If you don't disable the fuel system, the fuel injectors will "gas wash" the oil off of the cylinder walls dropping the actual compression numbers. Rings need a thin layer of oil to truely seal properly. That's also why you may have heard about people placing a small amount of oil directly into the cylinder if they got low numbers from it. If the compression number comes up after that, it indicates that the rings may be bad, if the number doesn't change, it indicates a bad valve-to head-seal.
Without getting overly technical, an engine that has higher compression (all else being equal) will normally produce higher compression numbers.
If you don't disable the fuel system, the fuel injectors will "gas wash" the oil off of the cylinder walls dropping the actual compression numbers. Rings need a thin layer of oil to truely seal properly. That's also why you may have heard about people placing a small amount of oil directly into the cylinder if they got low numbers from it. If the compression number comes up after that, it indicates that the rings may be bad, if the number doesn't change, it indicates a bad valve-to head-seal.
Without getting overly technical, an engine that has higher compression (all else being equal) will normally produce higher compression numbers.
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Re: Just ran a compression test... (00Red_SiR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00Red_SiR »</TD></TR><TR><TD CLASS="quote">
If you don't disable the fuel system, the fuel injectors will "gas wash" the oil off of the cylinder walls dropping the actual compression numbers. Rings need a thin layer of oil to truely seal properly. That's also why you may have heard about people placing a small amount of oil directly into the cylinder if they got low numbers from it. If the compression number comes up after that, it indicates that the rings may be bad, if the number doesn't change, it indicates a bad valve-to head-seal.
Without getting overly technical, an engine that has higher compression (all else being equal) will normally produce higher compression numbers.</TD></TR></TABLE>
learned something new just now! thanks
BTW, those first posted numbers are awsome...
If you don't disable the fuel system, the fuel injectors will "gas wash" the oil off of the cylinder walls dropping the actual compression numbers. Rings need a thin layer of oil to truely seal properly. That's also why you may have heard about people placing a small amount of oil directly into the cylinder if they got low numbers from it. If the compression number comes up after that, it indicates that the rings may be bad, if the number doesn't change, it indicates a bad valve-to head-seal.
Without getting overly technical, an engine that has higher compression (all else being equal) will normally produce higher compression numbers.</TD></TR></TABLE>
learned something new just now! thanks
BTW, those first posted numbers are awsome...
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