WHAT’S HOLDING IT BACK???

[1Holeshot]

I’d be interested to see what results you got if you ran 87 octane. You could always run your tank to about empty and then just fill it to about a 1/4 full to see what happens.

All my data was from 87 ethanol free.

This is what I am running with very similar results as you.

[fishnfireman]

Just for giggles----what is the elevation on the lake your running ??

[EuropeanAM]

87 octane (R+M/2 Method used in the US) is approximately equivalent to 91 RON (used there in Australia).

Run that level down and try running some 91 RON.

[thommo59]

Thanks for the input and will definitely try that. 91 is commonly available here.
Elevation I run at is sea level
Thanks for the comments and input

[fishnfireman]

Thanks for the input and will definitely try that. 91 is commonly available here.
Elevation I run at is sea level
Thanks for the comments and input

Answered that question-- For sure not elevation holding it back.

[thommo59]

Don, I read a post where an owner says he had a similar issue and a dealer discovered his engine was in “demo mode” which limited it to 75% hp even though it was registering 100% demand linear. His explanation was the dealer reset or reflashed and the result was night and day.
Is this possible??

[EuropeanAM]

Don, I read a post where an owner says he had a similar issue and a dealer discovered his engine was in “demo mode” which limited it to 75% hp even though it was registering 100% demand linear. His explanation was the dealer reset or reflashed and the result was night and day.
Is this possible??

This is not possible on your ProXS.

[thommo59]

This is not possible on your ProXS.

Bugger! And thank you ��