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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 geezer#99
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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Geezer#99, I'll give it a shot setting the timing at idle numbers lower per your suggestion. I appreciate you catching this!
I did not build the motor, it was purchased as a built long block which I went through and properly torqued all the main and rotating assembly connections. My father may have adjusted the valvetrain on the long block when we installed but I cannot recall. As far as I know, no valvetrain adjustments have been made. We were working on this project together for years and I can't be certain of everything he did prior to his passing 2 years ago.
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1969 C10 Stepside (PERCY - tribute to CDE)
1996 Chevrolet Tahoe 2-door / 2WD LS5.3/4A (ROBYN)
1998 GMC SLE Regular Cab Short Bed Fleetside 4.3/4A (LUCY) (driver)
2000 JEEP Cherokee Sport XJ 4x4 4.0/4A (RUBY, son #2)
2013 VW GTI Driver's Edition 1.8T/6A (GRAU GEIST, son #1)
2016 BMW X5 xDrive50i MSport 4.4L N63/8A (SCHNEEWITTCHEN)
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