: In the next few months I'm planning to get my car dyno tuned at SZ. I've been considering the dual program switch but I have never seen 100 octane anywhere close. Is it even worth it with my mods to have a 91 and 100 octane program? I already have alc injection boosting 18psi on 91 with stock turbos and engine internals, other mods are in profile. Will be purchasing IC's before the dyno tune. TIA
You're boosting above the efficiency of your turbos.. but to answer your question water/alcohol will work for you using a mix of 30/70 up to 45/55 ,,that's alcohol/dentured water.. I get the alcohol at Lowe's for $15 gallon makes two gallons of mix which will last for 2-3 tank fulls. Last time I spoke to Greg/Seb they weren't doing water/alcohol tuning.
