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-   -   Sanding a lower unit for speed (https://www.offshoreonly.com/forums/general-boating-discussion/285858-sanding-lower-unit-speed.html)

pqjack 02-10-2013 09:50 AM


Originally Posted by 4bus (Post 3860307)
I agree. I often wonder how much can be done with a stock bravo lower, however I wouldn't have a clue where to start.

Amazes me how smart most people in the sport are about engines, and how dumb most of us are about hydro dynamics.

+1...but we are not alone...from what i read everywhere,even the big companies are still learning..didn't i read that brand ''X'' outdrive will slow you down and has to be blueprinted/modified to perform better?

Keith Atlanta 02-10-2013 10:13 AM


Originally Posted by tomas_wallin (Post 3864584)
I just added a Hydromotive nose cone to my XR lower. It's also straightened, sharpened and a bit thinned.

I also got rid of the lower intake and modified the side intakes to make it work with the prop shafdt depth I'm at (3-1/2")

I'm going to leave it like this with no paint until l have tested.

It's wet sanded just like the bottom to a certain fine grit that according to a VERY reputable European boat designer works the best.
http://i1291.photobucket.com/albums/...psd679886d.jpg
http://i1291.photobucket.com/albums/...ps1f9e9ddd.jpg

No low water pick up? I thought the low water pickup was faster than the dual water pickup?

Orionsilverboat 02-10-2013 10:46 AM


Originally Posted by 1989mach1 (Post 3864550)
I was looking in to the speed nose cones for the bravos and thay r trying to say a 3 to 6 mph gaine with them. could that be

No way. You will not see 3-6 mph, the most u will see is 2 but probably a mph will be gained to be honest. You wont see any speed increase unless your running over 60 mph

1989mach1 02-10-2013 11:04 AM


Originally Posted by Orionsilverboat (Post 3864674)
No way. You will not see 3-6 mph, the most u will see is 2 but probably a mph will be gained to be honest. You wont see any speed increase unless your running over 60 mph

i got 82 last summer with a bad motor runing off 7. i had a roller lifter blow apart on me. if i could see 85 or up with both motors with fresh tops and full rebuld on the bad motor with the cones i will get them

1989mach1 02-10-2013 11:12 AM

also im looking to leave mine bare this year so will there be a way to get the cones to look right with out pant? or will it just be better to save for shortys and run the bravos as thay r for now?

tomas_wallin 02-10-2013 11:47 AM


Originally Posted by Keith Atlanta (Post 3864658)
No low water pick up? I thought the low water pickup was faster than the dual water pickup?

No and No! The low water pickup disturbs the water quite a bit.

1989mach1 02-10-2013 12:07 PM


Originally Posted by tomas_wallin (Post 3864700)
No and No! The low water pickup disturbs the water quite a bit.

looks relly good.


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