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Discussion Starter #1
does anyone no what the standard compression should be on a RB25DET engine?

the guy i bought my car off said it's got forged pistons and on the dyno he gave me it said a list of parts and hks forged pistons were listed he said he saw them from a bore cam report, im having the sump pulled off in a couple of weeks so we can see definatly what's in there. my mates got a compression tester so were gonna put a test on it to see if the compression's lower at all just to see if they have been changed?

The sumps gonna come off anyway so we can see the pistons, rods, crank and the condition of the bottem end,but as he has a compression tester we might as well use it.
 

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Discussion Starter #3
if it has got forged pistons wouldnt the compression be lower?

if so do you no what it should read then?
 
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