OK guys - update time.
Having phoned TDi North, I was given no info over the phone but asked to email details and they'd get back to me. This was the reply;
Hi Craig,
Approx 10 cars would be fine on a Saturday
On a dyno power run day we do not perform/check AFR, Knock, etc
Each car has 2 runs and one printout
Cost per car is £30 per car cash
RegardsIt was a different story at Dyno Demon though. Very helpful and can organise an event on either Saturday or Sunday.
They DO check AFR and use Charge Sensor / monitor boost circuit etc. They also carry out 3 runs as opposed to 2 and provide 2 printout graphs; Power V Torque and AFR V Boost. They'll also spend time with each owner to explain the printouts and make suggestions if necessary.
Minimum of 10 cars required at a cost of £40 per car.
In the spirit of being pro-active, they've offered us the weekend of 8th / 9th March to run an event. I don't know if this will work for people but I'll start a list and take it from there.
Comments welcome please.