Dual down shafts performance
#21
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Joined: May 2007
Posts: 292
Likes: 60
From: Stuart, fl
Imco just said let it spray out inside the helmet and cap the transom plate
#22
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Joined: May 2009
Posts: 1,941
Likes: 526
For comparison sake, my 06 38ZR imco SCX-4s are about 2” above hull bottom. Haven’t gotten a precise measurement on height or how far back they are. They are on ITS boxes. 17.25” 5 blades 18 degree rake. Planes out good with help of 280 k planes but isn’t challenging by any means. In a video that was taken with a go pro mounted in the notch you can clearly see the tip of the lower above the water. My slip isn’t the greatest however, 15-18 percent at cruise. From my experience and shops I’ve talked to the big imcos run the beat when up high out of the water and have a 16”+ cleaver to get around the big bullet and reach the water. There’s also the handling advantage with the cleavers. My boat was set up high to begin with with long sportmasters. 100+ 4 people coolers, full of fuel. 105 light, best so far of 108




#23
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Joined: Sep 2013
Posts: 2,320
Likes: 1,040
From: Wisconsin
#25
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Joined: Sep 2013
Posts: 2,320
Likes: 1,040
From: Wisconsin
Yes whippled 525s. Valve train obviously redone but other than that they’re still 525 guts. Boos did the tuning, run a 4.5” pulley, never on the dyno but should be around 825hp. Imo the whippled 525 is a really good package. A guy can’t help but think what it’d do with NXTs or #6s. The imcos are power/speed suckers but like others say you’ll be out boating not on the trailer!


#28
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Joined: May 2009
Posts: 3,895
Likes: 124
From: Chicago, IL; Onekama, MI




