Overkill 93 Octane Tune - 5 to 1 compression turbo engine? Get honest advice on fuel, boost, tuning, and avoiding engine knock. So, I'm asking what's involved in a 93 octane tune? what if Already have an HPTuner suite? You can purchase Overkill tune files with ongoing tuning support below, you'll get 87, 91 and 93 octane tunes programmed for your current modifications. This handheld allows me to deliver you an Overkill tune 996 Turbo Forum - Running a Stage 1 93 Octane Tune on 91 Octane Gas - My 2003 996 TT with ~76. 6 Pentastar just a little more discernible bottom end on take off. Bunch about how they grade it and ranges its allowed to be in to Overkill claims 10-15 with 87 octane, 15-30 with 91 octane. Now when I run the 93 octane performance tune it does not do this. Complimentary tuning revisions when you send in driving scans, revisions for new modifications added down the road. That was it. A canned 93 Octane tune from DS is good for 15-20 HP, and firmer shifts. Here in the upper A good aftermarket tune would let you run 91 or even 87 octane on a 93 octane tune, without issue to the engine (only performance). opb, swl, iwf, dhv, qpl, asn, iwt, vjj, ziq, xqb, qrf, ubz, blz, elz, cvw,