Sadly I don't have my own private tarmac rally stage to do my test but 20 seconds sounds about right to me, but when I do it it will be more than one run using the PB and backed up within 1%.
As I've said from the start I don't think my chances are that good TBH but I still have plenty of time to give it a go, but before I run, a CC expert will take my car out with vid cam and performance box because if he can't get close in my car I'll admit defeat as I don't want to spank my car by trying too hard just to win a bet
It was actually Paul that set that time in Snowies car so the driver was the same in both cars. Snowies must weigh about 2700 as a GP as that's what BRM Coopers base spec car weighed, where as Pauls weighs 2600 but was running 15's so although there will be something in it but it won't be more than a tenth of a second.
So have you got a copy of the dyno graph as above?