Thanks for all your help,

looking back at the day I think your spot on, I was definately chasing the tune and to be honest the performance was nothing to shout home about, to be honest was struggling to make the doubles, when i set the idle on the box had to keep turning in to stop engine over reving when pinching the pipe, first thing i did when running at the track was adjust the top needle for top end performance as i had set the lsn for 7 secs and the info said leave alone when at this stage,
will start again and follow Grizs instructions, tuning bottom for take off and manually setting idle.

Will let you know how I get on
will be a few days though as waiting for replacement parts for the car as blew a shock, have now stripped down for a total clean and maintenance.