RE: Fine tuning

[Jim Jablonski <jim@xxxxxxxxxxxxx>]

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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

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