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Thread: TBI-502-5 injectors, which one to buy?

  1. #1

    Default TBI-502-5 injectors, which one to buy?

    Hi all, have a TBI 502-5 with bad injector not spraying right, has a drip in spray pattern. Which injector do I order, and can get one from my local part store or only from Holley?

  2. #2
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    Quote Originally Posted by bryboob View Post
    Which injector do I order, and can get one from my local part store or only from Holley?
    Auto Parts Store application: 1987-89 5.0L GM Truck, 670 CFM Two Barrel TBI.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  3. #3

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    What's the part number? I only see injectors for original GM TBI, and they're bigger also on Holley's website. There are three different injectors, part 522-80, 522-43, 522-54. Which one would be for mine?

  4. #4
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    Quote Originally Posted by bryboob View Post
    What's the part number?
    I stated "Auto Parts Store", not Holley's website. I don't know the auto parts store number. Holley no longer carries those old style B2 fuel injectors.

    I only see injectors for original GM TBI, and they're bigger also on Holley's website. There are three different injectors, part 522-80, 522-43, 522-54. Which one would be for mine?
    Those are obviously the wrong fuel injectors.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

  5. #5

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    Hi. What I meant was, does the local auto part store sell injectors that fit the Holley TBI?

  6. #6
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    Yes, that application used OEM 1987-89 5.0L GM Truck (670 CFM Two Barrel TBI) fuel injectors.
    May God's grace bless you in the Lord Jesus Christ.

    '78 BRONCO: 508" stroker, TFS heads, 11:1 comp ratio, Dominator MPFI & DIS, cold air induction, Spal dual 12" fans/aluminum radiator, dual 3" exhaust/Magnaflow mufflers, Moroso vacuum pump, Accusump, engine oil & trans fluid coolers, 100HP progressive dry direct-port NOS, A/C, LenTech Strip Terminator wide-ratio AOD/2500 RPM converter, 3:1 Atlas II, modified Dana 44/60-lockers-4.10s, hydroboost/4-disc brakes, ram-assist/heim joint steering, Cage long radius arms, traction bars, 4" Skyjacker lift, 35" mud tires

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