"A" impeller question

[wsuwrhr]

From what I gather I am making 450-500hp to spin a Berk A at 5000rpms?
I can't believe my motor makes that much power.
Brian

[LVjetboy]

Berk A @ 5000 = 400 hp.
jer

[pops1]

LVjetboy:
Berk A @ 5000 = 400 hp.
jer Sent you a E on Dual or Twin Prop also posted under Dual, you get it.
Also to the Enigizer Kit Guy
You can use the berkeley chart- Impeller flows some 10cfm over berkeley but has some 18" of mercury bounce which relates to cav. Net is or should be close.

[wsuwrhr]

LVjetboy:
Berk A @ 5000 = 400 hp.
jer Sounds about right, thanks for the info
Brian

[LVjetboy]

Got it Dave, thanks for the info!
jer

[FordTech]

So here is a question. I am running 5000 rpm's with a "A" impeller at 5500 - 6000 foot above sea level, depending on the lake. Any idea on the possible horse power of this engine at sea level??

[Squirtcha?]

You'd have to go run your boat at sea level and get the max mph and rpm numbers for the program to give you horsepower.
No matter what the circumstances, you'd need at least two of the three variables to figure out the unknown.
rpm and mph to figure hp
hp and rpm to figure mph
etc. etc.
Oh yeah and impeller cut, but in your particular case, that would be a constant not a variable
[ October 12, 2003, 03:54 PM: Message edited by: Squirtcha? ]

[Jungle Boy]

Since every one else is running their numbers, I'll toss in mine just confuse the issue deeper!!
- Berkley SS "B", 5600 RPM @ 3200 ft = 98 MPH.
- 21' aluminum Eagle Tunnel.

[spectras only]

JB, out of curiosity what is your tin can boat weighs on the scales with fuel etc...? For a 21' boat with a small block [ or is it a BB ? ]your speed is exhilarating .A buddy of mine keep bombarding me with questions about building an alu boat with SB in mind.I've seen your model in life and it's really nice but too pricey for my bud.He also wants a smaller model like max 19'.How much would a bare 19' hull/deck cost at eagle? BTW ,is the 29 sport finished yet? That's the hull I'd like to have with twin SB's wink
[ October 12, 2003, 06:05 PM: Message edited by: spectras only ]

[Jungle Boy]

spectras only:
JB, out of curiosity what is your tin can boat weighs on the scales with fuel etc...? For a 21' boat with a small block [ or is it a BB ? ]your speed is exhilarating .A buddy of mine keep bombarding me with questions about building an alu boat with SB in mind.I've seen your model in life and it's really nice but too pricey for my bud.He also wants a smaller model like max 19'.How much would a bare 19' hull/deck cost at eagle? BTW ,is the 29 sport finished yet? That's the hull I'd like to have with twin SB's wink My race boat weighs about 1350 lbs with fuel. They run very well with not much HP, I run a 560 HP small block. The cost of a bare hull is about 7500 Canadian (but don't quote me on that). You'd have to get a hold of Eagle and ask them. The 29' is going to be winter project. This photo was taken last week at Sylvan Lake. It's going to be a very cool ride when completed.
[img]http://www.***boat.com/image_center/data/500/259P1010050-med.jpg[/img]