Can I get more Speed ?

jetski · 07 May 2009, 17:11

Honda 130 hp on a Tornado 5.8 rib, I am looking at purchasing this rib and he says max 30 knts ???! I am new to Ribs but I would of thought 130 horses on a 5.8 rib should equate to nearer 40knts. I would hope !!!

Am I right in thinking this can be sorted by prop choice ? or .........

Mollers · 07 May 2009, 17:17

Quote:

Originally Posted by jetski

Honda 130 hp on a Tornado 5.8 rib, I am looking at purchasing this rib and he says max 30 knts ???! I am new to Ribs but I would of thought 130 horses on a 5.8 rib should equate to nearer 40knts. I would hope !!!

Am I right in thinking this can be sorted by prop choice ? or .........

The Honda is a lot of the problem. They're old hat and heavy. If you page through the members list, you won't find too many of us running Honda O/B's

Actually, it's 104 of 6901 members running Hondas.

jetski · 07 May 2009, 17:35

Thanks Mollers, as usual info is King ! my experience with boats comes from a 2007 Mastercraft and the 6.7 V8 for my skiing.

I have a lot to learn where RIBS are concerned !! I was thinking WRONGLY Honda reliable not Power to weight ratios

THANKS

If I EVER GET TO THE WATER AT THIS RATE THERES A DRINK WAITING FOR ALL YOU KIND SOULS that have helped so much - enough now I will get up of my knees

adrian c · 07 May 2009, 21:52

hi

i have a 5.8 tornado with a 90 yamaha and can get 35 knots (gps) with a clean bottom

Mollers · 07 May 2009, 22:00

What is max design hp for a 5.8 Tornado? It must be 130-150ish.

Heart-trouble · 07 May 2009, 22:14

i used to drive a similar set up with the 130 honda on the back, with a full boat (10ish people) and trimmed right you would get 30 kts, so with the tornado you should get 40ish kts on a light boat if its trimmed right (alot of people dont know how to use the power trim)

Hightower · 07 May 2009, 22:20

I was told the HP on the Honda's of that era were measured at the flywheel and not the prop and that the 130's actually put out something like 115hp at the prop.

Also was told to watch for cracks around the valve seats too.

Mollers · 07 May 2009, 22:21

Quote:

Originally Posted by Heart-trouble

i used to drive a similar set up with the 130 honda on the back, with a full boat (10ish people) and trimmed right you would get 30 kts, so with the tornado you should get 40ish kts on a light boat if its trimmed right (alot of people dont know how to use the power trim)

I doubt whether 40knts would be achievable with that set-up. The boat you're describing might well have been under-propped as a dive set-up or something similar. Chuck the 10 people out and it might not have gone a lot quicker.

Downhilldai · 07 May 2009, 23:04

Quote:

Originally Posted by Mollers

...Chuck the 10 people out and it might not have gone a lot quicker.

Unless you got them to change the prop before they drowned.

Mollers · 07 May 2009, 23:35

Quote:

Originally Posted by Downhilldai

Unless you got them to change the prop before they drowned.

True.

Heart-trouble · 08 May 2009, 09:48

maybe i'm thinking of a different boat?

should be able to get more than 30kts out of the 130 honda tho

Mollers · 08 May 2009, 10:02

Quote:

Originally Posted by Heart-trouble

should be able to get more than 30kts out of the 130 honda tho

I agree.

tonymac · 08 May 2009, 22:47

jetski · 09 May 2009, 18:03

Thanks for the help - That boat has been binned !!, 30 knts flat chat and all the horses working is no good to man nor beast! so Budget blown

and I view and trial a rib tomorrow with proper power and speed

at least that is what it says on the tin !! GPS will tell all 2morrow

Thanks again

'130 horses are no good if 10 are Mules !!!'