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Re: QLCC overshoot
> > > with a stock spring however would be rather slow to get to the
> > > desired boost level and wouldn't overshoot.
> >
> > I have seen this in Brian Vinson's car. He had the stock spring, with my
> > ECU which has the QLCC chip. It felt very good, but did indeed take a
> > little longer to get up to boost.
> >
> ... what do you all mean by "stock" spring? My stock spring wouldn't give
> me anything above normal boost (1.2-1.3 bar) with the QLCC chip. I've
> never put a separate gauge on it, but I now get 1.5 bar indicated after
> installing the Charlie Smith spring ...
...plain normal factory spring which gives around 1.4 bar.
Only getting 1.2-1.3 indicates either your guage is bad or some other
sensor is preventing the computer from raising boost, or the wastegate
frequency valve has died/is mis-plumbed.
A wastegate spring would 'fix' any of these problems.
Orin.