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Compression test result built motor

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Old Apr 28, 2013 | 02:40 PM
  #1  
ThE HeLLRaZoR's Avatar
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From: Utah
Default Compression test result built motor

Cyl1=180, Cyl2=174, Cyl3=180, Cyl4=180

Engine Mods
B18c Sleeved to 84mm had been Milled Flat(Idk how much was taken off, probably not much as this motor only 69k when build began)
Gsr rotating assembly w/ JE Pistons 9.5:1
Cometic MLS Head Gasket

Gsr head mods:
Stock Cams/Gears
S2 Springs/Retainer
Ferrea .050 Valves
Stock Port Head has been Milled(same storie as Block)

Additional info:
Edelbrock VictorX Manifold
s2 74mm Throttle body
This test was performed while the Engine was Hot, WOT and ecu disconnected. I was currently n/a at the time of this test. Engine ran pretty crappy most of the time, excellent towerds the end. I put about 1200 on it using a jdm p72.

My question is don't them number seem a little Low?
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Old Apr 28, 2013 | 02:43 PM
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jdmh22eg2's Avatar
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Default Re: Compression test result built motor

I think they are righ on par. Maybe i missed it but how many miles? Maybe tings not seated all the way yet?
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Old Apr 28, 2013 | 03:14 PM
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Default Re: Compression test result built motor

NO, those results are perfect.
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Old Apr 28, 2013 | 03:18 PM
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Default Re: Compression test result built motor

Originally Posted by ThE HeLLRaZoR
Engine ran pretty crappy most of the time, excellent towerds the end. I put about 1200 on it using a jdm p72.
Soft break in = Soft engine.

Last edited by mar778c; Apr 28, 2013 at 03:48 PM.
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Old Apr 28, 2013 | 04:09 PM
  #5  
ThE HeLLRaZoR's Avatar
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From: Utah
Default Re: Compression test result built motor

Originally Posted by mar778c
Soft break in = Soft engine.
It was broken in pretty hard actually thats why I was kind of concerned.

I did a compression test on my buddy's b16a2 and the results were as follows.
cyl4=90, cyl3=260, cyl2=245, cyl1=260. Them 260s through me waaay off as to why his were so high?
Trips me out as to why his were so high compared to mine?

That makes me happy my numbers sound good. Thanks guys:]
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Old Apr 28, 2013 | 06:25 PM
  #6  
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Default Re: Compression test result built motor

Those numbers on the b16 is what you should be worried about
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Old Apr 28, 2013 | 06:59 PM
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Default Re: Compression test result built motor

Whats the elevation? Alot has to play with these numbers.. Weather elevation valve lash different gauges etc etc..
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Old Apr 29, 2013 | 08:52 AM
  #8  
ThE HeLLRaZoR's Avatar
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From: Utah
Default Re: Compression test result built motor

Originally Posted by yungmulacrx
Whats the elevation? Alot has to play with these numbers.. Weather elevation valve lash different gauges etc etc..
Good point on that. I'm in SLC Utah about 4400 feet! So all sounds well than thanks guys
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