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  1. #1 Plug gap??? 
    SE Level Member jaydubb71's Avatar
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    OK. In 2000 (I think... old age... haha!) I had the "breaking up on boost" issue. Replaced wires and coils. A buddy of mine from the turbo import crowd said "plugs" and gap em for .035. This magic number has appeared in the turbo V8 crowd that I run with also. I have been running this plug gap ever since.

    Over here, I see anywhere from .045 to .055 plug gap recommendations. My mod list is in my signature. What say you all?
    1998 GTP Coupe: Self-tuned with HPTuners, 3.4, FWI w/ 12 inch K&N, Autolite 103's, hot-wired FP, Caspers fan override, 180 t-stat, Speed Daddy headers, SLP exhaust w/ GTX tips, 12 inch brakes (Riviera/Impala), 6000K HID's, solid rubber engine and trans mounts, poly dogbone inserts (SOLD 3/2020!!! )
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  2. #2 Re: Plug gap??? 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    .040 to .050 is good on these cars for medium power levels.

    If you were pushing like 400-500whp with like a turbo setup, then a lower gap would be likely wanted. Most the LS V8's run smaller gaps even closer to .028-.030 because of the power they make. Also they have a higher compression ratio too, around 9.5:1 to 11:1 depending on engine.

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  3. #3 Re: Plug gap??? 
    SE Level Member jaydubb71's Avatar
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    Ok. I will try that. Thanks! BTW, I have no issues running .035 gap. Maybe the .045 will help mileage a lil bit. LOL! Wishful thinking when I keep making her whine. LOL!
    1998 GTP Coupe: Self-tuned with HPTuners, 3.4, FWI w/ 12 inch K&N, Autolite 103's, hot-wired FP, Caspers fan override, 180 t-stat, Speed Daddy headers, SLP exhaust w/ GTX tips, 12 inch brakes (Riviera/Impala), 6000K HID's, solid rubber engine and trans mounts, poly dogbone inserts (SOLD 3/2020!!! )
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  4. #4 Re: Plug gap??? 
    GXP Level Member coolone's Avatar
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    Boost relative... Mild mods, .45, 3" or smaller pulley I'd go .40

    Copper plugs and change em often ; )
    Overkill BBC Cam, YT 1.8 RR's, Rhodes Lifters, STGII Heads, GenV, Pacesetters, 3" Exh to Tips, TEP Trans. N*, ID 75# injectors/E85 coming soon
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  5. #5 Re: Plug gap??? 
    SE Level Member jaydubb71's Avatar
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    Quote Originally Posted by coolone View Post
    Boostn relative... Mild mods, .45, 3" or smaller pulley I'd go .40

    Copper plugs and change em often ; )
    Cool. Yeah, I know about them copper plug. I'm from the old school. Before exotic metal plugs. Lol. Thanks
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