Turbo Project update. The good, bad and ugly.

[Bruce Plecan]

Welcome to the Turbo world.
Yes, when making lots of HP you use lots of Fuel.  Some are worse then
others but any serious HP means serious Fuel.  I about ignore Knock Counts,
and Spark retard, as a one source piece of info..  If I see any signs of
detonation, then I'll first look at some datalogging, or if doing an intial
cal, then there is lots of data logging, and looking at plugs.  I spent the
first 2 months of running with a *known* setup without tipping into more
then 5 PSI, while sorting mine out.  Tuning with a Turbo, at least for me is
a very slow process.   Too easy to miss something.
   As a precaution I have a spark retard limit of 30 degrees, just so if it
does happen for some unforseen reason there is lots of room for cancelling
it.
   Just as I see it
Bruce



>      Just an update on my progress to date with my turbo project.
Background
> info: 350 chevy motor out of '74 van, two T3 turbos, TPI intake, Syty
> software running on 730, intercoolers added two weeks ago.
> The Good: 15 psi of boost is VERY good :) :) :)
> The Bad: Gas mileage SUCKS in boost! Hooking up is impossible -
> no,IMPOSSIBLE.
> The Ugly: This weekend the fuel pump went south during a spirited 15psi
> jaunt :( I don't yet know if the pistons are hurt. I don't think so, but I
> will not know for sure 'till I replace the pump and drive it.
> My question (of many): What is the relevance of "knock counts?" I guess a
> better question would be how many knock counts are associated with
terminal
> damage? A view of the scan tool showed 6-8 knock counts three seperate
times
> total time about 2 seconds. Under normal circumstances its at 0. Any
> speculation appreciated.
> Jon Fedock
> www.geocities.com/JonFedock <------Hmmm, need to update.

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