RE: Fine tuning

[tom hecht <baddd65@xxxxxxxxx>]

on the opposite side of the coin is plugging the power
valve and jetting 6-10 jets higher in the rear.
not sure where your settingas are, but this is how i
tune all of my buddies ebay specials (and sometimes
new) holleys and demons,

1) set all of the idle screws at 1 turn out,
2)set the butterflies to barely open, but equal,
3)make sure the pumps have a gap when idling.
4) if it wants to die, open each butterfly a quarter  
   turn till it idles
5)fine tune the idle screws, mine are set at 3/4 turn
out, and if i turn any one of them a quarter turn in
the engine will labor. the theory is to screw them out
until it starts to get rough then 1/4 turn back in,
i dont do that but many do.
 i can tell you both of my cars have double pumpers
and will idle all day long without choking you and
have got no stumble issues, the satellite has a rather
big cam and is set almost the same as my small engine
with small cam.

i also do not run power valves, to each his own.
i guage my jets by how they color my plugs, white
plugs need bigger jets, black plugs need smaller jets.

tom
65 satellite



--- ledman_70@xxxxxxxxxxx wrote:



> New Holley 780 cfm, but changing the power valve is
> an option I never 
> considered. Never changed the pump setting.
> Jeff
> Earl Helm wrote:
> > 
> > Is this thing a Holley? If so, put a power valve
> in it. That should 
> > stop the rich at idle. Then see how much vacuum
> you have with 
> > the Huges 509 cam, and then put the "Right" Power
> valve in it. That 
> > should make your 1500 to 1800 stumble go away. If
> not, I would 
> > suppect you have the Accelorator gap set
> incorectely.
> > 
> > Earl
> > 
> > 
> > This is VERY off the wall, so ignore if stupid in
> your 
> > case...but,....are
> > your air filters of sufficient capacity to support
> the carb/engine 
> > needs?
> > Mine were not...so I had a constant "over rich"
> > condition...adjusted to hell and back on the
> carbs...finally got some 
> > help. 
> > Bob Fortson
> > 
> > --- ledman_70@xxxxxxxxxxx wrote:
> > 
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> > > 
> > > I have changed jetting, squirter, and pump cam.
> The car is running so 
> > > rich at idle if you stand behind it, your eyes
> burn.
> > > I'm going to mess
> > > with the jetting some more next chance I get.
> The pump lever is at 
> > > stock setting, just touching the adjusting nut
> at idle.
> > > Jeff
> > > tom hecht wrote:
> > > > 
> > > > maybe this was already mentioned, but how have
> you
> > > set
> > > > your accelorator pumps? the holley manual says
> to
> > > set
> > > > the gap with the throttle wide open.
> > > > to me this is a little to agressive, i back
> mine
> > > down
> > > > a little from that, but its worth a try
> > > > 
> > > > tom
> > > > 65 satellite
> > > > 
> > > > 
> > > > 
> > > > 
> > > > --- ledman_70@xxxxxxxxxxx wrote:
> > > > 
> > > > 
> > > > > Yes, it has vaccum advance, no, I haven't
> taken
> > > a
> > > > > reading yet. Wouldn't
> > > > > be the first stick I've chased, though.
> > > > > Jeff
> > > > > Jim Jablonski wrote:
> > > > > > 
> > > > > > Well Jeff, I am not trying to throw a
> stick
> > > into
> > > > > the woods to get you to
> > > > > > 
> > > > > > chase it, and there's smarter folks than
> me
> > > here,
> > > > > but here's what I was
> > > > > > thinking ... when accelerating at cruise
> load
> > > > > upward past 1500 RPM,
> > > > > > among other things, you are also relying
> on
> > > vacuum
> > > > > advance (if so
> > > > > > equipped).  At wide open throttle (where
> you
> > > say
> > > > > there is no issue) it's
> > > > > > 
> > > > > > pretty much up to the mechanical advance,
> > > given
> > > > > the absence of vacuum.
> > > > > > 
> > > > > > Did the Jeg's unit come with vacuum
> advance? 
> > > > > What's manifold vacuum
> > > > > > reading at 1500 RPM?
> > > > > > 
> > > > > > Just thoughts ...
> > > > > > 
> > > > > > Jim Jablonski
> > > > > > Royal Oak, Michigan
> > > > > > '64 Fury
> > > > > > 
> > > > > > ledman_70@xxxxxxxxxxx wrote:
> > > > > > > 
> > > > > > > No, it was a system made for Jegs, I
> don't
> > > > > remember the name. It came
> > > > > > > with distributor, harness, control box,
> and
> > > > > ballast resister for around
> > > > > > > $140. You think maybe something could be
> > > faulty
> > > > > in it?
> > > > > > > Jeff
> > > > > > > Jim Jablonski wrote:
> > > > > > > > 
> > > > > > > > Jeff,
> > > > > > > > 
> > > > > > > > IMHO, at that RPM, it sounds spark
> advance
> > > > > related.  What's the new
> > > > > > > > ignition system ... Mopar
> ECU/distributor?
> > > > > > > > 
> > > > > > > > Jim Jablonski
> > > > > > > > Royal Oak, Michigan
> > > > > > > > '64 Fury
> > > > > > > > 
> > > > > > > > ledman_70@xxxxxxxxxxx wrote:
> > > > > > > > > 
> > > > > > > > > I installed a new 780 Holley and
> > > complete
> > > > > new electronic ignition in my
> > > > > > > > > 413 in the last 2 months. I've
> rejetted
> > > the
> > > > > carb, changed the squirter,
> > > > > > > > > and adjusted the timing and carb
> till
> > > I'm
> > > > > blue in the face, but I can't
> > > > > > > > > get rid of the flat spot between
> > > 1500-1800
> > > > > rpm. When you let the clutch
> > > > > > > > > out and the engine starts to load,
> > > that's
> > > > > where the flat spot is most
> > > > > > > > > obvious. If you take off
> agressively,
> > > it's
> > > > > invisible. The engine has a
> > > > > > > > > 509 Huhges cam, headers, and a 2"
> carb
> > > > > spacer to adapt the Holley to the
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > 
> > > > > > > > > original cast intake. I can't
> determine
> 
=== message truncated ===



		
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