Bruce Nunnally


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We baselined our car a few days after we got it and made 417hp/405tq on a Dynojet. With a bit of tuning and ramping up the boost we made 520/506tq. We then added FASTERPROMS downpipes, which resulted in a 550/533 — with no additional tuning — after more tweaking to the spark and fuel map, we were rewarded with a 558/539. We then added FASTERPROMS drop-in filters and cut out the air box and added AlkyControl methanol injection and made 580rwhp and 560rwtq. The GM PCM was complex in its methodology for managing torque. It will bleed off boost or limit spark advance or shut the throttle if it sees more torque than commanded, and most of the time you cannot just command more.


2016 Cadillac ATS-V gray/black; 2013 Cadillac ATS 2L Turbo Premium (Wife's)

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