The bloke told me if i put normal unleaded in it, it doesnt run right, to him it appeared to be hesistant and hold back?

I think from what ive got here, its been mapped to 210bhp, from 180bhp. still got the standard exhaust, airbox and re-circ valve on though.

Might try putting normal unleaded in it next then, is it a myth that supermarket fuel is crap? according to google and a few searches supermarket fuel is just as good as normal fuel from bp, esso, shell etc..

Hmm.