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  1. How to choose the right Spark Plug / Heat Range

    Engine
    Maybe someone, with a similar combination, would be willing to make a spark plug recommendation... 69 Camaro - Manual Transmission - 3.73 Rear Gear Gen VI Big Block - Iron Block .030 over - 489CID AFR 290cc Oval Port Heads Eagle 4.25" Forged Rotating Assembly 10.70:1 Compression Edelbrock RPM...
  2. AFR Log - need help all you wideband tuners...

    Performance
    OK, So I have a 327, double hump heads, unknown cam, HEI, dual plane Edelbrock, 350TH, Holley Street Avenger 570. I have been working with an Innovate LM2, and tuning on this carb for some time: I have swapped out the primary metering block for a Proform with adjustable IFR & PVCR I have...
  3. help w/ engine noise

    Engine
    out of nowhere my solid roller cam, AFR-alum head 406 started making a loud noise and I shut her down. it was a loud banging/ clanking noise over the pass side head. drained the oil, removed filter, checked plugs, removed valve covers, checked fuel pump. nothing looked abnormal so I ran her for...
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