it is chipped mate. not sure by who though. all i know is it goes way beyond the boost cut, cutoff. ive since had the fuelling setup and have 12psi and 15psi on demand (crude toggle switch/amal valve affair!!). im going to get a bayjoo chip in the future though. been getting a missfire occasionally albeit a loud as fuck one so reckon either the plugs need replacing/gapping or the dizzy is tired. only does it when under load ie low engine speed/high gear (4th) and letting it pull through to the effective powerband. goes pop just prior to the start of the usable power, then all is well. timing/fuelling is spot on.