RE: Fine tuning

[Jim Jablonski <jim@xxxxxxxxxxxxx>]

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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 what's causing the flat spot, so 
> > > 
> > > 
> > > 
> > > I don't know which direction to go from here...any ideas??? Bueller? 
> > > Bueller?
> > > 
> > > Jeff Adams
> > > 64 Polara
> 
> 
> 
> Jeff Adams
> 64 Polara

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