How do you tune an ECU without knock control

[Con Torrisi]

I had a similar experience. Owned a car that I bought from my dad. It had
pinging ever since I could remember, knew it was bad but seeing it had
always done it I didn't worry. I sold the car with 90,000miles on it and the
engine had never been opened but ran just as good as the day it was new.

However, I know of someone else who had a modern turbo efi engine that had a
slight trace of pinging and he destroyed it in months.

Difference is that the car I had was NA and not hi performance and never
really pinged at high rpm, my friends car was the opposite and what I think
is that because his exhaust was so loud you couldn't really hear the engine
anyway.

Cheers

Con


----- Original Message -----
From: "Bernd Felsche" <bernie at innovative.iinet.net.au>
To: <diy_efi at diy-efi.org>
Sent: Thursday, October 04, 2001 10:51 AM
Subject: Re: How do you tune an ECU without knock control


> Bruce tapped away at the keyboard with:
> > So they are writting fairy tales for adults now, how interesting. <g>
> > And to think some scoff at the little guys around here.
>
> Nothing wrong with "light-knock". My car's had it since new; now
> over 240,000km without any damage due to knock.
>
> These fairy tales are recognized Engineering practice. (At least
> according to a number of SAE papers.) Knock will start to do damage
> if it's severe enough to strip the boundary layer off the surface of
> the metal, allowing direct contact between the burning gas and the
> metal. The boundary layer usually insulates the surface from
> temperature and velocity extremes.
>
> > From: "Stephen Webb" <swebb at netlab.uky.edu>
> > > This is normal
> > > and actually enhances [economy/power]"  blah blah, your engine
> > > is designed to tolerate this for brief periods, blah blah.
>
> --
>  /"\  Bernd Felsche - Innovative Reckoning, Perth, Western Australia
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