Switching from 93 Octane to 91 Octane and keeping same Dyno Tune

[Titan 5.0]

Hey guys. Got a question here... I currently relocated from US to Canada and don’t have any Accra to 93 Octane fuel anymore... :-(

I’ve been dyno tuned by PSI Motorsports and rather not give up the tune... they did a great job.

I also have a tune from Lund still on my nGuage... Lund said the following;

“you will not need a new tune for that fuel . its adaptive octane logic so power will be less on 91 fuel due to being less quality and knock sensor picking that up . per your mods you should be fine too with the 2.5 upper for 12-13 lbs as 91 is the minimum octane you can use“

Does this apply to the PSI tune and the car in general regardless of the tune??

If not I will re-upload the Lund tune and send them some data logs to review... but again, rather keep PSI.

Anything helps guys...

Thanks again.

 

[Catmonkey]

Why not ask your other tuner? What Lund told you makes sense, but it's not their tune you want to run and it's not a global statement.

 

[Weather Man]

Do not bet your motor on the tune, you pick up some bad 91 and you will be in a world of hurt. Run octane booster, if you don't want to change the tune.

 

[fullboogie]

I'm sure Patrick would revise your tune for the new octane. He's a good guy.

 

[CobraBob]

Do not bet your motor on the tune, you pick up some bad 91 and you will be in a world of hurt. Run octane booster, if you don't want to change the tune.

This! Personally, I would want a separate 91 octane tune just to play it safe. JMO.

 

[Race Red Boss]

You can get 94 Octane at any Petro Canada Gas Station and ESSO offers 93.

 

[enormous]

Yes to 94 Petro Canada but not every Petro Canada station offers 94 as stated above.

 

[Race Red Boss]

Yes to 94 Petro Canada but not every Petro Canada station offers 94 as stated above.

True, but I've found that quite a few have it.

 

[RedVenom48]

When I moved to the Phoenix area, I originally scouted for fuel. 100% of the stations I went to had 91. Found that like CA, 93 is non existent in AZ. Seems to be true west of the Mississippi. Found a few places with 100 octane and 1 place with 100, 95 and 91. When its time for power upgrades, I may decide to fill on 95, then 100 on race days.

Its a pain for only one place to have the octane I need, but considering the car will only be a weekend/hoon car at that point, it should do just fine. I may fill a few 5 gallon jugs and keep them at the house to top off if I cant get back to that station, and a bottle of BOOSTane in the even Im out and cant make it back to the station.

If your car is only a weekend or fun car, then it might make sense to a keep some 5 gallon jugs of 93 handy at home or BOOSTane to keep your car safe if all you can find is 91.