an image of the "OLD" tag, they appear to still be on the inlet section

Add about 10-15 percent to those numbers for a real comparison.
The turbines are rated at a standard day ambient temperature of 59 degrees f . Anything above this ambient temperture one must not exceed the thermodynamics limits
of the engine.

In the left column is the dash mounted gauge

the t53 has a built in torque measuring system so the pilot may accurately measure mechanical limits while in opertation
it is a basic dash mounted pressure gauge.
When i push my throttles forward my gauge easily exceeds 85 psi.
i have heard some guys have seen over 100

So this is whats going to drives

Just checked my BPMs and there actually 1.19-1 ratio what ratio did you go with?

I was told they are 1.1 however they may be what u have. They were the spare race set for JBS Racings mystic.
I have a set of Forged Herrings 31.8 x 16.5 12 degree rake i am going to start with.
its a set i got from Dave scotts team years back.
I have accumulated several sets over the years. My boat loved for all around performance
16x35 mercurys at 16 degree rake with the 1.35 ratio in the sixes.
I want to try something low pitch for the maiden voyage. I was told i will need ventilators too. I was also told these Surface drives eat propellers
like popcorn.
I would love to know your transom angle and how far back your ball socket begins and how high it is off the running surface.
Welcome to the Turbine club!! Post anytime in here! although i think you had or were messing with some russian stuff years back.
Did you take yours apart and count teeth? or did you the here hold my beer and spin the shaft method.

Hello Jay, how did you determine the ratio, a tag or punch digits on the case or? thank you