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Hey guys got a mill at work so i think im gonna shave the head in my r34 na. Its stock appart from an exhaust and CAI. Thinking i will take off 1mm. Assuming from calaulations this will provide 11:1CR. Apparently the engine is 10:1cr standard?

Any info much appreciated

Cheers

I know this is a NA question but i was thinking that you guys would have a bit more knowlege on engine internals...

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https://www.sau.com.au/forums/topic/255754-shaving-the-head-rb25de/
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I don't think you'll be able to take off that much without ruining it. You should talk to an engineer near you that does RB engines.

I don't think valve clearance will be an issue but you may have to shape the combustion chamber to match the bore size as it may shrink with a shave of that magnitude.

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