Corvette C3 Forum 1968 through 1982

Timing and power

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Old Feb 19, 2008 | 03:45 PM
  #11  
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Default RE: Timing and power

No problem. In the end, I think that link to the timing, etc is very informative and can really help out anyone just starting out.
 
Old Feb 21, 2008 | 08:12 AM
  #12  
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Default RE: Timing and power

At idle you have high manifold vacuum and also at steady cruise you have high manifold vacuum, at the moment you floor it, you have no manifold vacuum then when you reach steady cruise your vacuum again comes into play.
Hope thishelps, PG.


Is that why the car feels like it wants to stall when you floor it? Since it loses all vacuum advance?
 
Old Feb 21, 2008 | 02:12 PM
  #13  
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Default RE: Timing and power

More likely a bad accelerator pump or power piston (Q-jet)/power valve (if Holley). Bad ignition system could possibly cause this as the heavy load placed on the engine will require a higher voltage for the plugs.
 
Old Feb 21, 2008 | 06:09 PM
  #14  
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Default RE: Timing and power

Yup, sounds like the power piston, another thing is the timing. You can get the same hesitation from being just a little out of whack.
 
Old Feb 21, 2008 | 09:04 PM
  #15  
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pg
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Default RE: Timing and power

Hi again, if yourVette trys to stall when you floor it, do like 73shark and C3 Starship said, look at the carb. When you floor it the accelerator pump in the carb should shoot two streems of extra gas in. Remove the air cleaner and move the throttle and see if that happends. PG.
 
Old Feb 21, 2008 | 09:13 PM
  #16  
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Default RE: Timing and power

Hey guys thanks for the awesome advice once again. I really do not know what I'd do without you all. I did the timing today and everything works like a charm again. It turned out my timing was about 20* off. The last time I did the timing I didn't have to worry about taking the hose off first since it was an electronic distributor and it was all done internally.

 
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