TwinTurbo.NET: Nissan 300ZX forum - Opinions on compression test needed!
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Subject Opinions on compression test needed!
     
Posted by tytyisfly27 on February 28, 2013 at 4:39 PM
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Message Hey everyone!

I've been researching a few JDM front clips for my friend who will be doing a TT swap in his '93 2+2, (Yes, he knows what he's getting himself into haha!)
Anyways, I have some puzzling compression results from one of the clips. Here they are in order:
185, 190, 185, 185, 182, 185

I know stock compression for a VG30DETT is 174, so I'm pretty confused. Also, this was a dry test was performed on a cold engine.
Normally I'd be staying far away from this clip, but since all cylinders are within 8psi, I figured I'd ask for some opinions before writing it off all together. I wouldn't imagine carbon buildup would produce numbers that high on a cold test. Perhaps significantly advanced timing? Maybe even an NA block??
What do you guys think?
I have a few other solid options with 150-160psi cold.

     
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