Hi new to the group. I have been reading up on turning boost up on a 940 2.3 petrol engine. Can anyone advise the cheapest most efficient way of doing so. Thanks

 

go over to turbobricks.com (another forum, oriented towards performance tuning of volvos and see their FAQ on stage 0, stage 1, stage 2, stage 3 performance enhancements on B230FT engines.

you can't put that much more air (boost) into the system without needing more fuel than the stock system can deliver, which means bigger injectors, bigger fuel pumps, aftermarket ECU.

(soap box)

everything you do to increase power will cost money, short term and/or long term as things break sooner and wear out soon.

(off soap box)