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Thread: Stuttering!

  1. #1
    Join Date
    Jan 2003
    Location
    Near Knoxville TN
    Age
    67
    Posts
    10,717

    Stuttering!

    Probably spark plugs. Got on it a bit today and it started cutting out about 4k rpm. I'm still running the spark plugs that were in it before the rebuild and before the blower. They're IT20's gapped for running NA, so I'm changing to TR6IX gapped to .028 and see how that works out. They're out of stock so I gotta wait until tomorrow morning.

    Oh, and that brief period of boost put it up to 16 psi. I'm hoping for 18 or so when I can get on it for longer.
    Thanks to Darrin @ BC Automotive:
    $1800 and it was worse than when he started!

    Brian (FordNut) FPG # 1458 of 7838
    03 MM 300A (Lotsa mods, 130k mi) was 303rwhp/318rwtq N/A
    then 476/410 D1SC ProCharged on stock block
    then 660/555 D1SC PC on 5.3 wet sleeved Teksid alum big bore stroker
    then 365/369 N/A on 5.3 wet sleeved Teksid alum big bore stroker
    Now 751/617 3.4L Whipple on 5.3 Boss5.0 iron big bore stroker

    03 MM 300B Silver (Mostly stock, originally wife's car, 370k mi) FPG # 7053 of 7838 or 49 of 417 SB
    03 MM 300B Silver, Stock, wife's next one, 136k mi FPG # 7134 of 7838 or 89 of 417 SB
    04 MM Silver, Stock, on standby 85k mi, FPG # 1212 of 3214 or 432 of 997 SB
    01 F150 longbed
    01 F150 shortbed
    00 F150 4x4 stepside
    01 F150 4x4 7700
    68 Stang FB (70 351C 4V, 4 wheel discs, project car)

    Mods listed here (some items not current): FordNut's Mods

  2. #2
    Join Date
    Apr 2004
    Location
    Rockford
    Age
    64
    Posts
    10,227
    So go and change them already!
    2004 Trilogy #93P 12.2@113 Built and stalled

  3. #3
    Join Date
    Nov 2002
    Location
    St. John, IN
    Age
    45
    Posts
    14,251
    Brian, I had to gap my plugs at .025 with the KB 2.2 (17psi) to stop spark blow out.

    You will probably need a boost a spark. I had planned on running one when my setup is done.

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