WHAT’S HOLDING IT BACK???

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Originally Posted by DaveTTN

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.

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

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

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.

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

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Originally Posted by 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

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

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??

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Originally Posted by 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??

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This is not possible on your ProXS.

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Originally Posted by EuropeanAM

This is not possible on your ProXS.

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Bugger! And thank you ��