Sanding a lower unit for speed

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02-10-2013 | 09:50 AM

#51

pqjack

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Joined: Jul 2011

Posts: 821

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From: mirabel,qc

Quote:

Originally Posted by 4bus

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?

02-10-2013 | 10:13 AM

#52

Keith Atlanta

Gold Member

Joined: Jul 2008

Posts: 3,748

Likes: 869

From: Delray Beach, FL

Quote:

Originally Posted by tomas_wallin

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.

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

02-10-2013 | 10:46 AM

#53

Orionsilverboat

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Joined: Feb 2013

Posts: 38

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From: Pittsburg

Quote:

Originally Posted by 1989mach1

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

02-10-2013 | 11:04 AM

#54

1989mach1

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Joined: May 2011

Posts: 3,313

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From: medina ohio/ vermilion ohio

Quote:

Originally Posted by Orionsilverboat

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

Last edited by 1989mach1; 02-10-2013 at 11:12 AM.

02-10-2013 | 11:12 AM

#55

1989mach1

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Joined: May 2011

Posts: 3,313

Likes: 24

From: medina ohio/ vermilion ohio

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?