On Alfa number 15
AO Platinum Member
Join Date: Dec 2005
Location: United Kingdom
Re: Turbo lag
Turbo lag is the delay between pressing the accelerator and power being delivered.
However many confuse this with boost threshold, which is the engine speed at which the turbo is able to produce meaningful boost.
If your boost is coming in higher up the rev range then it usually points to a sticking wastegate or a boost leak.
If you haven't already I would get the car put on a rolling road to check the fuelling too. If you have done other modifications then it is always a good idea.
If the engine is running lean at high boost then it won't be long before it goes bang. You cannot normally detect pinking from normal driving, but a rolling road session will detect it.
You will never be cool driving a Vauxhall.