passive crossovers

I was hoping someone in here was familiar with passive crossover design and could lend me a hand.

I have a 2nd order high pass passive crossover @ 130hz - 4ohms. If I were to put an 8 ohm load on it instead of 4 what would the crossover fz be??

I plugged the 4ohm and 130hz into the calculator and it told me I should have a 6.9 coil and 216 cap. If I change the data in the calculator from 4ohm to 8ohm and change the fz from 130 to 260 it gives me the same 6.9 coil but the cap drops down to like 77 or somewhere around there. 

I don't need it to be exact, a round about figure will work.

Thanks.

Thanks for the input. Thats what I thought but was not 100% sure.

On a first order high pass crossover, if designed for a 4 Ohm driver, the crossover frequency will be twice the frequency into an 8 ohm load. 

On a second order crossover, it appears that the cap is proportional in one direction, where as the inductor is proportional in the opposite direction.  I have no idea what the outcome will be if the 8 ohm driver is connected to the second order crossover designed for the 4 ohm driver.  My guess is a non linear crossover.

https://www.the12volt.com/caraudio/cross2ohm.asp

https://www.the12volt.com/caraudio/cross4ohm.asp

https://www.the12volt.com/caraudio/cross8ohm.asp

Rather than make a new post I figured I would put the question here.

When building or buying a passive crossover should I figure on the ohm load of the speaker or the overall ohm load that the amp would see.

For example I am planning to run 2 4ohm speakers in series to produce an 8 ohm load. If I plan to put the X-over between the amp and the first speaker should I base the X-over on the speakers 4 ohm impendance or should I base it on the overall 8ohm load that the speakers will be producing once they are wired in series?