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7220 box and 8202 coil, turbo application, rev limit Issue?

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  • 7220 box and 8202 coil, turbo application, rev limit Issue?

    Hello, I've been trying to track down an issue on my turbo SBF where under boost it does not like to rev past 5800 RPM. Also the HP is way down from what I think it should be at 21 psi of boost.
    This is a new build with old parts so I have no reference.

    I have a 7220 box, 8202 coil, stock 1990 Mustang TFI distributor, old Ford Racing plug wires if it matters, was running NGK 5722 BR9ES plugs gapped at .018" on Pro E85 fuel. I'll be switching to BR7ES plugs next time by my tuners recommendation.

    I'd been suspecting maybe it was a plug wire, ignition noise issue messing with my EFI computer, but I found this thread, and saw post # 10 and I was wondering if anyone thinks that could be the issue? Thank you.
    https://forums.holley.com/forum/msd-...220#post191114
    Last edited by Streetcarthings; 11-19-2022, 05:01 PM.
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