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You wouldn't actually feel it, as you accelerate the turbo starts to spool up so it's forcing air into the engine so you will have a positive pressure on the engine side of the turbo. This will be maintained as long as the turbo is spinning at the same rate. When you change up a gear you no...

All IMHO but the fluttering sound is air being forced back through the turbo when you lift off where it should be being released by the DV, either back into the system if using a recirc valve or to the atmosphere if using a vta. It can cause the turbo to stall which isn't a good thing but I do...

I have had this before on a previous car and although the reasons behind it were a little concerning (!) the car ran fine until at least I sold it (don't know what happenned to it after that but was fine at the time!!) and that was at 77000 miles. It did have an after market vta dv fitted and I...

Bit of a lottery as each car will be different even the same model due to wear and tear on different parts but for a 4wd car I'm guessing between a 15 and 25% reduction in the figures you have, 2wd will be less. I believe the figures you have will have been reached by doing the opposite, taking...