terravast4

iTrader: (25)

yep. I was getting that vibe. I knew I been there before. 🤦🏻‍♂️

FFDP

iTrader: (2)

Run 89 octane, better than 87 and gives you some wiggle room.

All those tooners that say it's a 91 or 93 octane tune just lean it out more and slap more timing in it. It's pretty stupid if you ask me. Run it at 12.3-12.5 AFR and 20-24 degrees of timing. Who gives a flying F about the 10-15hp you miss out on when it's run at 12.8 AFR and 28 degrees of timing when you're doing regular driving for 99% of your day.

ZBrink

This is helpful advice, thank you. I've been trying to get a dyno tune in VA and the tuners have been sorta a-holes via email honestly. One even told me it was 93 or he's not gonna do the tune. Another told me, weeks after I was very specific on what I wanted, that he only does sport truck tunes, nothing for towing. 🤷

AllFyredUp

Mail Order Tuner is the way to go!! You’ll have to have the HP Tuner program and they can dial it in!! They did mine and I will never use anyone else! Tons of choices out there GOOD LUCK, hope it all works out for you.

FFDP

iTrader: (2)

For the most part with many places that do lots of vehicles they basically just have a cookie cutter file that they can start with. That file is likely not to change much unless the vehicle really requires it and if the tuner actually cares enough to spend time with it. Obviously not all places are like this but I hear about it often enough.

To me when someone says it's gotta be a 93 octane tune or nothing means they don't care enough. They just want to slap in a tune with lots of timing with a leaner air fuel ratio and if the engine doesn't show knock, they send it on it's way. High octane fuel lets them get away with it at that point in time in a very specific situation on a dyno. Time is money to most shops and if they can get you in and out in less than 2 hours, they will just keep earning money faster.

Running a lower octane fuel like 89 octane with a cammed engine is totally possible without sacrificing a lot, it can just take a little bit of time of real world tuning to dial it in.