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-   -   What props on flat bottom Gun?? (https://www.offshoreonly.com/forums/prop-talk/253042-what-props-flat-bottom-gun.html)

CignificantOther 06-18-2011 11:37 PM


Originally Posted by OldSchool (Post 3431384)
What ratio are your drives?

I'm running 1.61 wet-sump #6's on my '88 with 800 per side. 16.5 4blade 30P Mercs. My drives are turning out and the boat planes like a Bravo boat. The bullets of the drives are almost 1" above the bottom surface. 6100 WOT in the low to mid 80's.

Craig

The difference is our # 6's trim in so much further than the # 5's. That's why we don't have any blowout. Trim your drive all the way in on the trailer and take a look. It almost appears like the gimbal is broken......they really tuck under. The # 5's just don't provide much negative trim angle.

Midwest Customs 06-19-2011 12:31 AM

oldschool, shouldnt you be seeing faster WOT speeds? A friend of mine had a 99 top gun with twin 1000hp and dry 6's and his top speed was 106 on gps. the 6s definatly trim in way more, his boat was runing 17x34 4 blades & it planed like a 26foot crownline:eek: However his drives must have been set deep because it had no roost...Im really hoping to see upwards of 90+ out of mine, or am I out of my mind?

bigfarmer 06-19-2011 09:49 AM

I put on the 17x35's and the boat planed out very well but i couldn't get the revs up (which i expected) i hit mid 80's at 4700rpm... Took them off at the beach and put on a set of 17x30's which have a polished mirror finish (could hardly get on plane) not sure if the finish was making the prop slip too much or what.. i ended up going for dinner and didn't get to run the boat at WOT and get any numbers. Ill try this week and see..


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