anyone running Ribcraft 585 with 90hp opti ? - Page 2

biffer · 01 December 2011, 17:23

115 is a sensible choice but a 130 probably won't use much more fuel on a boat that size. I did C2 ribs boat transom search back through the posts

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Bern Hanreck · 01 December 2011, 17:28

A couple of thoughts.........re. the " low freeboard " , with an auto Rule 1100 in the bilge , you should be able to cope with most conditions assuming you can keep the pointy end facing the waves. ( maybe use a drogue ? )

I'm a big an RC fan as the next , but the nearer you get to 150 horses , the more likely you are to experience a bit of chine walking . Regards Bern

biffer · 01 December 2011, 17:54

Problem solved

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Maximus · 01 December 2011, 17:54

[quote=cjl;432284]

All of us!!

YEP!

viking61 · 01 December 2011, 17:56

Bern , yeah makes sense , i don't need to go fast fast , just need to be able to truck along in a nice sea , think the hull gives me that , just the usual mopre power less power more fuel argument . with the prices they charge for fuel at my local places it's gotta be thought about and i REALLY hate carrying cans every time i go out , plus if I leave the cans on the boat they get pinched.

Maximus · 01 December 2011, 17:57

Quote:

Originally Posted by Pikey Dave

If it's got wheels or t1ts, you know it's going to be expensive

Speaking of RC 585's

Nice!

viking61 · 01 December 2011, 18:08

Biffer , looks like a jumbo "smooth Groove "

)

HUMBER P4VWL · 01 December 2011, 19:59

Our 90 made the 5.4 sr chine walk and had instant mid range. Would a 115 not do the same with a RC 585? Therefore that 130 really would be a waste of power and more importantly cost.

Im a speed freak twosome degree, but once an engine makes a hull chime walk, you're at it's limit.

I've seen an RC 585 with 115 opti on and thought it was one of the most balanced boats for seaworthiness, speed, tow And launch ability and Internal size for a small family of 4.

thomas · 01 December 2011, 22:08

Quote:

Originally Posted by biffer

Problem solved

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I guess I'm lucky, my transom goes straight across.

Burtox · 01 December 2011, 22:54

I'm running a ribcraft 585 with a 90hp Honda 4 stroker...... It will do 25mph with 10 people on board with a 17 pitch prop and 34mph with 2 up.

It gets on the plan no trouble and doesn't feel too heavy on the transom. I also have a low transom and can fill the boat with water if I give it a large handfull of reverse. but normally it high enough not to be a problem.

Its not super fast but adequate on the flat. but very exciting in the rough.

http://www.youtube.com/watch?v=XqMBo4wW7K0

biffer · 02 December 2011, 07:26

A few have ask about this transom dam. Unfortunately this isn't something you can fit yourselves. Not saying most couldn't fit one but the mould was made oversize as a blank so to speak
I lay it up. Scribe it to your boat taking into account all the bits in the way and when it fits to my satisfaction I'll put the attachment flange on it
You could fit it yourself then

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biffer · 02 December 2011, 08:01

Hate to deny you guys the use of this. I'll have a look to see if it can be supplied as a blank. You could hold it in place and glass it in but then you couldn't remove it better to lay it on a flat board and layup a lip on the underside. Then you can screw it on. The reason I'm reluctant is if you bugger it up it's still got my name on it. You can come across all kinds of things in the way. Steering is the main obstacle then the engine tilt. You might have to put recesses to clear the link arm. This is where it get more complicated.

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Downhilldai · 02 December 2011, 08:03

Quote:

Originally Posted by HUMBER P4VWL

My research finds the opti 115 to be 170kg or 177kg for long shaft,? the etec 130 is 177kg or 184kg for a long shaft. The 135 opti is a 2.5L V6, much heavier, whereas the 130 etec is a 1.7L 4cyl block.

Why didn't you extend your research to the 125 Opti, which would be a more even comparison to the 130 e-tec?

Quote:

Originally Posted by HUMBER P4VWL

The 115 opti is a 1.5L 4cyl.

No, it's a 3-cylinder, as is the 125 Opti.

Pikey Dave · 02 December 2011, 08:04

IMHO chine walking, in a lot of cases is a result of poorly rigged & handled boats & to some degree the imagination of the crew/handler. The 585 above with the 175, yes was OTT but the power wasn't wasted. We used to dive a wreck 23nm off shore over in France & due to the time of slack water, depth/deco of the dive, & time that the "Ecluse" (lock gates on the harbour) closed. We had about an hour after the last diver was out of the water to get back to harbour before the gates closed. We had to choose our days to get the weather & tides right, but we regularly ran back in at 45kn with 3 divers + cox. The boat was solid & sure footed without a hint of instability. Choose a good hull, get the loading right, correct prop, engine height setup & well handled & unless you're extremely unlucky, chine walking is in your head. Some people seem to wear "Chine Walking" as a badge of honour "ooh we had her chine walking...." Did they really? or was it because they weren't driving to suit the conditions

I've had my grumbles about RC, but IMO the 585 hull is one of the finest around, & I've been in a few

Get some horses on the back & enjoy. 90hp won't do her justice.

Downhilldai · 02 December 2011, 08:10

Quote:

Originally Posted by HUMBER P4VWL

Our 90 made the 5.4 sr chine walk and had instant mid range. Would a 115 not do the same with a RC 585?

Unlike the RC585, the SR5.4 doesn't have a planing pad, so would be more prone to chinewalk. Its lighter weight also increases its tendency to do this, so you're not really comparing like with like. As an aside the 3-cyl Opti is heavier than Avon recommend for an SR5.4 with 20" transom.

I've been on a number of RC585s with 115+hp and they've all driven fine, if a touch light in the bow. A good motor for this boat is the DF140 Soozook, not yet discussed in this thread.......

kerny · 02 December 2011, 08:44

Quote:

Originally Posted by Downhilldai

Unlike the RC585, the SR5.4 doesn't have a planing pad, so would be more prone to chinewalk. Its lighter weight also increases its tendency to do this, so you're not really comparing like with like. As an aside the 3-cyl Opti is heavier than Avon recommend for an SR5.4 with 20" transom.

I've been on a number of RC585s with 115+hp and they've all driven fine, if a touch light in the bow. A good motor for this boat is the DF140 Soozook, not yet discussed in this thread.......

scuse my ignorance DHD but what is a planing pad?? is it where the hull flattens out near the stern.

Pikey Dave · 02 December 2011, 08:52

It's the flat spot at the stern where the keel looks like its been ground off. Triangular ish in shape, size depends on hull design. Could be a foot or so wide & extend 18" or so towards the bow

kerny · 02 December 2011, 08:57

If you don't ask....

thomas · 02 December 2011, 10:22

Quote:

Originally Posted by biffer

A few have ask about this transom dam. Unfortunately this isn't something you can fit yourselves. Not saying most couldn't fit one but the mould was made oversize as a blank so to speak
I lay it up. Scribe it to your boat taking into account all the bits in the way and when it fits to my satisfaction I'll put the attachment flange on it
You could fit it yourself then

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For some reason my hull came out with a 25" transom by mistake which is why it's about the only Ribeye made Ribtec without a Yamaha, the only engine long enough available at the time was the 115 on it now - Was handy on Sunday though when it was a bit choppy.

HUMBER P4VWL · 02 December 2011, 11:00

Kerny, keep up!

Dhd, learn something new each day. Didn't know they did a 125 opti, is tht still the 1.5l block?

Meant 3cyl, oops. Nice and quiet though.

Re RC chime walking, that's why I asked the question.

I still think over 150 on a 585 is getting excessive. But heh, as I said, horses for courses.