JD,

My engine has a Whipple stage 2 tune on the ECM, which is SUPPOSED to reduce the transom suet. I do, in fact, notice a significant increase in the suet between 89 octane and 93. I always try and run the 93 (wish I could find a consistent source for 91), but there have been a couple times the station I happened across was out of 93, so I pumped the 89, and just stayed out of the fun stick for the day. I also try and run on a fairly empty tank, to reduce the weight, both on the road and on the water, so I'm usually running pretty close to what I've just recently pumped.

Just my two cents....

Thanks. Brad.
(937)545-8991

Blower motors and 89 octane do not mix.

ICDEDPPL,

OH, absolutely agree. I've only done it twice, and only due to a lack of options. We do most of our "close to home" boating at an overgrown puddle close by, so we can just cruise around, staying well below any manifold pressure.

My intention going forward is going to be, when 91 octane isn't available, to pump equal parts 89 and 93 (again, assuming that's what's available) whenever we need fuel

As a side note.... Do we really consider the ProCharger to be a real supercharger? All the drawbacks of a turbo, with none of the benefits of a roots or Whipple. I'm not so impressed with the package I've got. I was all excited about buying a boat with a supercharger, but not so much now that I've had to prop down to get the family boat I sold the wife on when we were discussing buying it. I'm hoping to eventually talk her into letting me repower at some point, including the drive.

Thanks. Brad.
(937)545-8991