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Thread: Fuel Flow in LB/HR around idle.

  1. #1

    Default Fuel Flow in LB/HR around idle.

    I'm curious after messing around with my Base Fuel/Timing Tables to gain more resolution on those tables. I got to thinking is there a formula for figuring out the amount of fuel in lb/hr needed for a vehicle to idle? I Googled some stuff and came up with this, correct me if I'm wrong:
    Per Liter of displacement = approx .08 - .1 Gallons per hour = .49 lbs/hr - .62 lbs/hr
    So mine being a 438ci = 7.178 Liters = 1.896227 Gallons = 11.7 lbs/hr

    I'm horrible with math, so I could be completely wrong, but if there's a better formula or you could point me in the right direction that would be much appreciated. Just curious as to how you determine the lowest value of fuel lbs/hr that can be entered on the table. Not looking for an exact answer just some input.

  2. #2
    Join Date
    Dec 2009


    My big block Ford idled around 9.5 lb/hr. My small block Ford idles around 4.5 lb/hr. Lots of variables.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: Dominator MPFI & DIS, A/C, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/X-pipe/shorty headers, 100HP progressive dry direct-port NOS, 160A 3G alternator, Optima Red battery, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, FRPP 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 tires.

  3. #3


    Thanks Danny, just getting a better understanding for some of these details. I'm close to getting my turd on a dyno. LOL.

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