Boost Threshold

Turbocharger starts producing boost only above a certain rpm (around 1200-1500rpm) due to a lack of exhaust gas volume to overcome the inertia of rest of the turbo propeller. Power suddenly increases after that particular rpm when turbo propeller starts spinning. So power Vs. rpm curve of a turbocharged engine has a steep increase in power at boost threshold rpm. There have been many advancements in technology to reduce boost threshold rpm below idle speed rpm of the engine, so as to virtually eliminate the boost threshold.

Turbo Force are moving from the 15th January!

The new workshop and premises will be located at:

Unit 10, Tardy Gate Mill, Coote Lane, Lostock Hall, Preston, PR5 5JD

The old premises will still be functioning as normal from 8.30 am to 4.30 pm and we can still be contacted on: 01772 697979 or by email to for any enquiries.