Thanks guys.
The variations give me a good range.
The billboards currently are at 28 lbs. This was the auto set at the tire shop.
As the Cobra is quite light with the aluminum block I am prepared to experiment. Being out of town I will run the temperature up on the highways so will look at a hotter temp pressure - as a start point.
The difference in the pressures suggested makes me feel comfortable in reducing and experimenting.
I have a high quality pro tire pressure gauge and a compressor in the garage so have the option to play until I find the optimum for me and my driving style - erratic..
Thanks again. I will run the pressure on the garage wall and change over the next few weeks. Thanks again.
Bernie