[s-cars] Potential reason why the "370" software causes pinging

[Dave Forgie]

Joe:  You must have missed the part where I said I have a VMAP that is turned down
(to 2.8 Bar).  It helps but I still get some pinging.  I had originally wanted a
VMAP so if I was travelling and was somewhere that only had 91 Octane, I could turn
the max boost down.   I didn't expect to have to use it while running 94 Octane.  9L
of toluene in a tank full of 94 (71 at 94+9@116 = 96.5) was fine at 3.0 Bar.  But a bit
pricey.  /Dave F.

Joe Pizzimenti wrote:

> Think of it more like medicinal marijuana than crack cocaine.  :-)
>
> IMO, anything more than 21 or 22psi on 93 octane pump gas is just
> asking for trouble.  Perhaps manually turning down the boost or using
> an MTM 1+ boost chip with that timing chip will solve your pinging?
>
> Or using a VMAP and cranking it down accordingly.
>
> Joe
>
> On Wed, 29 Dec 2004 09:36:05 -0800, Dave Forgie <forgied at direct.ca> wrote:
> > Joe:  Suggesting that octane boost (like the 5 gal can of toluene in my
> > garage) is the cure for my problem is something like suggesting crack cocaine
> > is the cure for insomnia.  Waaaaay too addictive.  I posted the same
> > "SMS/7.8:1"  info to Audi World and Mihnea replied that he believes that:
> >
> > "The 370 HP chipset is a Lehmann fuel/timing chip (originally sold by Ned as
> > his own in his Stage 4 chipset) and a TS Tuning (Tom Schmalz)  boost chip. I
> > don't know if the boost chip is another copy of a copy, but it's definitely
> > not a good chip, as the maps that
> > affect the knock sensors have been changed. The only reason for pinging in
> > the "370" sw is the way too aggressive timing advance and lack of knowledge
> > when changing the knock sensors "window" for listening to knock."
> >
> > Hmmm.... I guess I had my TSTs and SMSs mixed up.  But still, it does seem to
> > make sense, even without the 7.8:1 compression factor.  I am working towards a
> > FMIC so I guess we'll see if I need new software (or water injection) after
> > that. /  Dave F.
> >
> > Joe Pizzimenti wrote:
> >
> > > Solution: Increase octane.
> > >
> > > Whether by a water/methanol injection system or the ever so addictive
> > > blue cans of VP Racing 109 octane unleaded "C12", a little more octane
> > > will solve your problem.  Or a FMIC.
> > >
> > > Joe
> >
> >