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Thread: Waste-Fire Question

  1. #1

    Default Waste-Fire Question

    Chevy V8, Dominator, Dual Sync Distributor, Waste-Fire 556-101 coils. When installing the Dual Sync Distributor the instructions say to set the crankshaft to 50° BTDC on the compression stroke on cylinder #1. This is the way I setup my engine, but then I was thinking (perhaps a bad thing) that since this is a Waste-Fire system does the initial 50° BTDC setting need to be on the compression stroke?

  2. #2
    Join Date
    Jan 2010
    Brisbane, Australia


    I'd say follow the instructions. You'll have #1 on compression, and the paired cylinder of #6 is on the exhaust stroke. Every engine would be setup starting from #1. Gary

  3. #3
    Join Date
    Dec 2009


    Setting #1 cylinder BTDC on the compression stroke is just good practice. I installed my Holley EFI Waste-Spark ignition system (LINK) this way, even before I upgraded to sequential injection (LINK). Why do it any other way?
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS T/W 11R 205 heads, 232°-244° duration/.623" lift/114° LSA camshaft, 12:1 C/R, TFS R-Series FTI ported intake, BBK 80mm T/B, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 200A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, -6AN fuel system plumbing, Walbro 255 LPH pump, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/3000 RPM converter, B&M Hammer shifter, FPP aluminum driveshaft, FPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 M/T Street Comp tires.

  4. #4


    It might work either way for waste-fire, but down the road you might switch to sequential and then it won't work. I agree that following the instructions makes the most sense.

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