Thanks for your advice on the day Kevin. You're right the top speed run was there for the taking I could not go over 162 due to the back of the car snaking. We did some work on the front aerodynamics that worked well the steering was well weighted all the time but we had on rear wing or diffuser. I dont think there was enough weight over the rear wheels to put the power down, it just pushed the rear of the car from side to side.
I had to turn the boost down to 1.5 bar and take it easy on the throtlle, power was not an issue had masses in reserve. I have ordered a big rear wing and we are designing a rear diffuser, that should sort it.
Did 11.77 on the 1/4 mile @ 1.7 bar but could not get off the line my best 60 ft was 2.17. If I had put race fuel in and upped the boost may shaved a bit off. Any way learned more and lived to fight another day.