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  1. #101
    GXP Level Member GTPpower's Avatar
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    Default Re: Tuning 60 pound injectors

    When is the last time you did plugs? And what are they gapped at?

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  2. #102
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    Default Re: Tuning 60 pound injectors

    Less than 6 months ago. I used autolite XP 104 iridium gapped at 55.

  3. #103
    GTP Level Member
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    Default Re: Tuning 60 pound injectors

    Thanks for the help everyone!!

    I have decided to switch back to my normal gas set up once this tank of E85 is empty. Less to worry about.

    There will be slightly used 60# injectors, a 3.0 and 3.2 pulley, an AEM ethanol fuel pump, and HP Tuners available in the next 2 weeks or so.
    2007 Grand Prix GT. Pacesetter headers, 1.8 roller rockers, CAI, HPTuned, 3.4pulley, TEP transmission, fuel pump and alt rewire, poly mounts/performance suspension, Impala front brakes drilled and slotted rotors.
    Past Grand Prix- 97 GT, 03 GT, 04 GT, 04 Comp G.

  4. #104
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Default Re: Tuning 60 pound injectors

    .055 is a pretty big gap for the mods in my eyes. A .045 would be better to prevent blow out.

    SMGPFC Member #1

  5. #105
    SE Level Member
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    Default Re: Tuning 60 pound injectors

    If you do decide to go back to gas, I'd buy the 60s off you. I really do think you can make this work, though. Surging is what my car did when I had a microscopically cracked insulator on a spark plug.. I chased that problem down left right and sideways. Ended up being something stupid.

    .055 gap on a 3.0 pulley could very well be blowing the spark out.
    2001 Buick Regal GS Supercharged 3.8L 231ci Pushrod 90 V6 | 4T65E-HD
    Gen V M90, 3.6/3.4/3.2/3.0/2.9" MPS, 1.9 RRs, 60lb injectors, E85, F&R Powerlogs, 3" DP, 3" stainless exhaust, Intake, 104s, 180 t-stat, Rendezvous HUD, Blacked-out headlights, Tint, F-body brakes, F&R GMPP sways, Tuned.

  6. #106
    GrandPrix Junkie SgtMarshal's Avatar
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    Default Re: Tuning 60 pound injectors

    I had bad luck with iridium plugs. .055 is a big gap, you should try some copper tips gapped to .035 or even .040

  7. #107
    GXP Level Member GTPpower's Avatar
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    Default Re: Tuning 60 pound injectors

    Yeah, I would try knocking the gap down to .035 and see if there is a difference.

    2001 GTP - cam, headers, nitrous, stock trans - 11.83 @ 116 <$2k in mods - sold
    2005 F350 6.0 - studded, deleted, bulletproofed, tuned
    1966 Olds Cutlass 442 Convertible
    2000 Chevy Silverado 2500 6.0l

  8. #108
    GTP Level Member
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    Default Re: Tuning 60 pound injectors

    What gap would you run on 93 octane and a 3.4 pulley with iridium plugs?

  9. #109
    Killa Bee Scottydoggs's Avatar
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    Default Re: Tuning 60 pound injectors

    .050 works fine for me, i also run copper core 104's. if your modded at all, run copper plugs.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  10. #110
    GTP Level Member
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    Default Re: Tuning 60 pound injectors

    Ok thanks.
    It seems like I got better acceleration when I use iridium. I used copper and it didn't seem to accel as well, but I also had on the crap Zzp wires at that time.

  11. #111
    Killa Bee Scottydoggs's Avatar
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    Default Re: Tuning 60 pound injectors

    try the 104's gaped to 50. they are cheap enough.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

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