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Boost motor compression results !!!!

Old 01-28-2008, 10:41 AM
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Default Boost motor compression results !!!!

so i finished building my b16 with low compression pistons did a compression test and got the following
180, 180, 165, 180

im kind of concerned for the cylinder that gave me 165 is being 15 off a big big deal or can i go ahead and tune the car like that

Old 01-28-2008, 11:56 AM
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Default Re: Boost motor compression results !!!! (GdmLaz)

I would be concerned also. It could be your rings are lined-up. I would take that piston out and re-ring it.
Old 01-28-2008, 01:08 PM
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Default Re: Boost motor compression results !!!! (GdmLaz)

before napalming the car,
do a leak down test and see where it is coming from, it could be as simple as a tight valve.
Old 01-28-2008, 03:08 PM
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any more suggestions
Old 01-28-2008, 03:11 PM
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leakdown test will tell you if its going through the rings, out the head gasket, valves etc
Old 01-28-2008, 03:13 PM
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Default Re: (welfarepc)

is the engine warm? broken in? WOT when cranking?

If no to any of the three, that could be ur problem.
Old 01-28-2008, 04:24 PM
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you are supposed to be at WOT when crankin the motor ?
Old 01-28-2008, 04:30 PM
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Default Re: (GdmLaz)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GdmLaz &raquo;</TD></TR><TR><TD CLASS="quote">you are supposed to be at WOT when crankin the motor ?</TD></TR></TABLE>

yup
Old 01-28-2008, 04:54 PM
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ill try it ill let you guys know whats up
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