The triple 525sc is pretty thirsty and when Im far away and need gas and they only have 89 available, the methanol could be turned on just to provide detonation insurance while getting on plane.
Any other ideas like a way to control boost or take some timing away?

Carry some octane boost with u and u are good to go. Every carb blower motor I tuned I set on the fat side a little bit. Never had any trouble and one was beat on very hard by a lead footed 19yr old kid!! I can not see any reason to put a water methanol injection system on but I don't know everything.....

Ive never been able to find out how much octane boost is required to raise 89 to 93 per gallon. Non of the cans say it on the label. Do you know? I carry 300 gallons of gas and i thought it would take a lot of octane booster

what about something like this http://www.summitracing.com/parts/ms...FawWMgodkl0ApA

I thought they were only used with MSD ignition modules. I use the Merc TB1v

I agree.

I wouldn't be retarding the timing much. The exhaust valves will take a hit from the increased EGT temps. The stock timing curve is pretty lazy on a 525sc. I think youd be fine on 89 with adding intercoolers. Or upgrade to a larger blower like a 671, 871, or 420 B&M, and keep the boost around 5lbs. The larger blower will cool the air down much more than the little 177 blower even without intercoolers..

If you do a search, there should be an old thread on meth injection systems. If memory serves me correct, in the thread Bill Pyburn (Pure Platinum Skater) gave input and basically gave credit to the injection for the longevity regarding the run time in the 1350's he was running.

Im in whitby can you recommend an engine guy?

I like the components from AIS- http://www.alcoholinjectionsystems.com/index.html
Talk to Rodney, they can set you up, and have complete bolt in kits with everything you need. Spraying into the top of the blower will dramatically lower your air temp. On a setup like yours I'd probably knock the timing down to 33-34 max, and have the water meth come in at 2lbs boost. Should have no problems running 89 on a setup like that. The nice thing about these kits in a boat is there's usually enough room for a decent sized tank. You can even set it up to run straight water. It doesn't have the same power potential as water meth, but it will keep your engine's safe.