Ended up taking the car down to Grant and got it on the dyno (replaced the ECU with an aftermarket LINK ecu in the end to solve my boost issues). One thing that's come out of it is apparently the chargecooler is extremely inefficient with 220bhp being the current limit from inlet temperatures rising to 80C. Core of the barrel is 4"x10" (cylinder) which was apparently specced to 350bhp. Did you run into similar problems with your chargecooler setup?
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