Re: QLCC overshoot

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Wed, 21 May 1997, Steven Buchholz wrote:

> > > 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 

Steve,

	I mean the wastegate spring that came with the car from the 
factory.   I have a bunch of them here. :-)

> never put a separate gauge on it, but I now get 1.5 bar indicated after 
> installing the Charlie Smith spring ...

That sounds about right.   If you add the washer/spacer, you should get a 
little more.

I was successful in Brian Vinson's car with the stock wastegate spring, 
but Gross Scrugs is having trouble with his.   I suspect that the ECU is 
holding back based on a temp sensor or something like that, because 
Gross' car sometimes does run up to 1.8bar.   You might check out your 
sensors and plumbing also.

Later,
Graydon D. Stuckey 

"Cool name man!" - Jay Graydon   :-)