Hi K. Lund
I sent you an @ Mail
Vems.UK is a great place to get help, and I think that you should make a profile with all the info. on your car you have, then it becomes much easier for others to help and advise you.
At Vems.uk there are many super talented Swede and maybe some of them have knowledge about a Volvo with turbo.
1) Make a profile with all the info about your car.
Do you have a dyno test, it could also be cool.
If you need info. I know that Peter stands ready to assist you.
Welcome to Vems.uk
Best regards
Pedersen