[DMCForum] Re: ATTN: Jim S
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[DMCForum] Re: ATTN: Jim S



CAn we please stop talking about PRV engines?

There are other aspects to the car!!

--- In DMCForum@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx>
wrote:
> My replacement PRV has what appears to be a timing scale transferred
> from a DeLorean (has a notch at 13 degrees). Note that 10 degrees is
> Volvo B27F spec (according to factory literature) as well as B27E
and
> Renault Z7V (R30). That notch has always perplexed me. Just to try
> your theory out, I advanced to it before driving to Louie's house
this
> weekend. Valves didn't clatter a bit (93 octane) BUT:
> - Power certainly wasn't increased
> - Plugs came out white
> - Engine ran too hot
> I have Louie as an eyewitness.
>
> With all due respects, your theory failed.
>
> I think the fellow in Ohio who was marketing these engines
transferred
> DeLo timing scales to get then through emissions (are non-Lambda).
> Timing to that notch has never produced anything but problems. He
must
> have gotten the initial index OK because engine performs like a
champ
> back at 10 degrees. Note that photographs of actual engines in Volvo
> factory literature shows no notches on B27 timing scales. Am
assuming
> Renault Z7V is the same.
>
> Bill Robertson
> #5939
>
> >--- In DMCForum@xxxxxxxxxxxxxxx, Jim Strickland
<ihaveanaccount@xxxx>
> wrote:
> > Isn't it ironic that the website that Martin told you to read
months ago
> > is now your vindication.  I knew you didn't read it!!!
> >
> > Unfortunately, the website does not say that advanced timing
reduces
> > horsepower.  It says that advance for the sake of advance is not
> > necessarily a good thing.  He says that an engine that needs less
> advance
> > can achieve more horsepower, not that an engine with less advance
will
> > achieve more horsepower.  The difference is that he was talking
about
> > similar timing advance over different engines, where you are
talking
> > about changing timing advance in the same engine.
> >
> > He also says that "Excessive advance is just as detrimental to
power
> > output ", but this is in reference to his earlier comment where
the
> > excessive advance caused knocking. 
> >
> > You may be right, but I still think you're wrong; and this
website does
> > not help your case in my opinion. 
> >
> > Jim
> >
> >
> > On Sun, 04 Jan 2004 20:04:34 -0000 "content22207"
> > <brobertson@xxxx> writes:
> > > Re: Martin's Message #38006 on the List:
> > >
> > > As much as I hate to gloat:
> > >
> > > The third paragraph under the section titled "Ignition Timing"
> > > clearly
> > > states what I have maintained all along -- that too much
ignition
> > > advance can REDUCE horsepower. You can't simply rotate the
> > > distributor
> > > until the valves start to clatter, then back it off a degree or
two.
> > > That is NOT the point of optimum spark -- it is the point
closest to
> > > potential engine damage. Is a world of difference between the
two.
> > >
> > > I'd have given David Baker MORE than a pound for pointing that
> > > out...
> > >
> > > Bill Robertson
> > > #5939
> > >
> > >
> > >
> > > 
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