Quote:
Originally Posted by mARC
Side note to this: I have been informed that there is no need to undertake a tune when replacing a block only?
For example moving from my stock Bug WRX block to am EJ207 doesn't require a tune?
'yes I know that the other additions to my build will require it to be tuned, I'm just curious about a straight out block replacement.'
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Depends on the Compression ratio between the two blocks.
If you went from 8.4:1 then swapped in a 9.0:1 short you may have detonation issues on the stock tune (or it will always run with the timing retarded as far as it can).
Always worth a dyno health check either way.