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Old 10-29-2018, 11:40 AM   #20
geezer#99
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Re: '69 C10 327 SBC Off Idle Stumble / Misfire Help - I feel like I've tried EVERYTHI

Quote:
Originally Posted by SRT8-X View Post
Thanks for the reply. I did not account for the calibration in the distributor in setting the timing. I found TDC, verified, set initial to 16° at idle (950 - 1000 RPM) at the zero mark on the timing tab, then set total timing to 36° at 3200 RPM. I will be calling Performance Distributors to verify this but their instructions for setting timing comply with the method I used, not referencing the calibration specs.

The intake is the traditional non-air gap type, it's rated from idle to 5500 RPM.

I do not have the cam specs but it's pretty basic, nothing radical, no significant lope, idle is smooth.
That’s why your numbers don’t add up!
At 950-1000 rpm you’re getting into the mechanical advance in the distributor.
You need an idle lower near 700 to set initial.

Did you build the motor?
Who set the preload on the lifters?
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