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Old 2009-08-14, 11:30 AM   #5
A1337STI
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Join Date: Jan 2006
Location: Reno, NV
Posts: 1,840
 
Car: Impreza and an Impreza
Class: AS / CRS PerfStock
 
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1 last Q
if the compression test says 140 (@ 6200 feet) would it read the same at 4500 and at 0 ft altitude?

I'm guessing so , as the D&D dismantlers has a 1.8L that they said tested at 150 comp on all 4. (my subaru service manual says a comp test should read between 140-160) and i can't imagine you'de hit 150 with 80% of the atmospheric pressure if the gauage was absolute ?
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