Had some Mapping done by Simon(jgm) on thursday this week at srr. Great job by Simon.

Mapped on Tesco99 and got 375.1bhp on a 18g which is a fairly typical result. Then added 10 litres of Methonal and no more power could be gained from the beast. Simon did say its possible the turbo was just at its max and also the engine was a little noisier than he remembered from my last mapping a year or two ago, Although its just clicked 99k on the clock so is never going to be ultra quiet at that mileage.

Anyone else had a similar experience??