HP losses from Bravo 1X drive
12-28-2006 | 11:39 AM
#53
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From: Spicewood, Texas USA
Re: HP losses from Bravo 1X drive
WOW, really cool pictures. I've never seen it from the outside since I'm always in the boat. Great pictures. Can you email me those pictures. I'd love to put them on the web site if you don't mind.
Bob
Bob
12-28-2006 | 12:10 PM
#54
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From: Missouri
Re: HP losses from Bravo 1X drive
Bill
12-28-2006 | 10:43 PM
#55
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From: Nashvegas, TN
Re: HP losses from Bravo 1X drive
Steve, after you get your engine back together why don't you drive down and let's put it on the dyno. I'd be happy to do it on a weekend. I can even tweak the ECM. Just get an 02 bung welded in your headers while it's apart. You're no further away than "Rage" is. He came down a couple of weeks ago. Sure would be nice to know exactly what power you've got.
Bob
Bob
The motor is out. Thank you for the invitation. I really wish I had done before and after dyno runs. We are putting an 02 bung in and Eric will be using his 02 meter to fine tune the fuel curve. I may take you up on your offer this spring!
BTW, I like that L&S dyno.
Happy New Year,
Steve
Last edited by Steve Zuckerman; 12-28-2006 at 10:48 PM.
12-28-2006 | 10:54 PM
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From: Nashvegas, TN
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12-28-2006 | 11:34 PM
#58
Rob
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From: Ms
Re: HP losses from Bravo 1X drive
Rage
I would think the propshaft dyno would load it harder than a prop would ?
How much HP will it go up too?
A video would be pretty cool!!!!
Rob
I would think the propshaft dyno would load it harder than a prop would ?
How much HP will it go up too?
A video would be pretty cool!!!!
Rob
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12-29-2006 | 06:02 PM
#59
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From: Spicewood, Texas USA
Re: HP losses from Bravo 1X drive
Strip, those photos are at my shop when we dyno'd Rage's boat.
It is rated to 800 PSHP. The most I've measured is 588 though. You are correct about it loading the drive pretty hard. Basically you open the throttle all the way and the dyno loads it to the predetermined RPM. So, far a few seconds you are at WOT at 4000 RPM and the boat is not moving! The problem is the drive is gear reduced. So if the engine is turning peak torque at say 4500 RPM, then the prop shaft is turning 3000 RPM, but has the torque multiplied by 1.5. A 400 ft. lb. engine would be making 600 ft. lb. at 3000 RPM at the prop. To the dyno it's like measuring a big diesel engine. All the dyno measures is torque. I won't be dynoing any supercharged big blocks at the prop
12-29-2006 | 07:24 PM
#60
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From: Missouri
Re: HP losses from Bravo 1X drive
Thanks, we like it a lot. It is perfect for our type of boating that includes a lot of wake boarding and tubing. Yes I ran it all this season and it runs sweet. However the dyno test showed me it is not yet at its full potential so the work continues. Of course the work never ends.
Regards,
Bill
