Originally Posted By: Turbo-6
With bump port 30 psi all others 35 psi new Kirby-Sissell will be 35+.

Now I know why I still use carbs !!!


Thanks Turbo-6
I had thought you needed to run 10 psi more with the Brazilian 12 port to make the same power as the Siamese port head?

Or was it the divided Siamese head needed 10 more PSI to make the same power as compared to an undivided head?
I believe it was the last question I posted is correct.

MBHD

12 port SDS EFI