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Ultra 28 Stealth

Old 03-05-2023, 04:38 PM
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Default Ultra 28 Stealth

I have a 01 28 ultra stealth with 625hp. Was trying to see what prop size and speed should I see. Thanks ahead for any info.
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Old 03-06-2023, 07:10 AM
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I have never been in a Stealth, but I have been in lots of similar West Coast boats. Assuming it has a 1.5 ratio drive, most likely a 28P Bravo 1 and around 70mph
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Old 03-06-2023, 08:03 AM
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Thanks. Yes 1.5 drive. Do you think of going with an imco lower unit would it help, make a difference and pick up mph. I feel the boat needs more lift so it has less drag
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Old 03-06-2023, 08:43 AM
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Need more info. What prop are you running now? What speed and RPM @ WOT? How does the boat respond to trim? Is it a MCOB which is very bow heavy? How far below the hull is the current propshaft?
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Old 03-06-2023, 05:21 PM
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I appreciate the help. However boat is in storage. When I get it out and get the info I will get back to you. Thanks
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Old 03-06-2023, 05:27 PM
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Quick search i saw one for sale with 525efi 1.5 bravo and stated had a 28 bravo prop. That's all i have for you. Maybe cruise the west / midwest boat sites ?
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Old 03-08-2023, 12:02 PM
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Originally Posted by SB View Post
Maybe cruise the west / midwest boat sites ?
Aye, hit up River Daves Place.
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Old 03-08-2023, 09:44 PM
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K thanks for the info
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Old 03-09-2023, 08:24 AM
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Originally Posted by G502runtime View Post
I have a 01 28 ultra stealth with 625hp. Was trying to see what prop size and speed should I see. Thanks ahead for any info.
G502,

Absolutely no experience with your hull, and I have no idea of any similarities, other than size and similar HP....

I'm in a PowerQuest 280 Silencer (4800lb, single step), powered by a 496HO w/ an M1 Procharger and Whipple stage 2 tune. ProCharger advertises their 496HO kit at 615HP, so I figure we're in the same ballpark. With a 1.5 ratio B1 outdrive, we are turning a Bravo28P prop and running about 76 MPH GPS, right at 5K RPM.

Offered as a point of reference.

Thanks. Brad.
(937)545-8991

Last edited by Brad Christy; 03-09-2023 at 12:46 PM.
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Old 03-09-2023, 11:45 AM
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Thanks for the info.
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