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The ACN tunes are really slow compared to the 91 and 93 tunes. They only run in the 6-8 degree of timing range while targeting just under 22 psi of boost. The standard 91 octane tunes are up in the 12-13 degree range. I found the stage 1 91 faster than the stage 2 91ACN. I’d do some data logs to confirm it’s not pulling a bunch or timing and to confirm it’s hitting boost targets.
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