In my old car, ZC Powered Rover 416i (integra 5 door, 86 styles).... absolutely stock, but would only take optimax coz the compression was so high after the previous owner overheated it, and a few thou was shaved off the head........
Used to chop N14s daily going to TAFE..... only had a few runs with N15s, but the result was muchly the same..... Mind you, i call a "chop" 1/2 - 1 length - well, I used to in the rover, it wasn;t exactly a bullet
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