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Offshoreonly.com (https://www.offshoreonly.com/forums/)
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-   -   One of the five becomes a Six (https://www.offshoreonly.com/forums/cigarette/324009-one-five-becomes-six.html)

frickstyle 03-24-2015 10:58 AM
Maybe you posted this already, but with the 5s - power, RPM, prop size please?

mrpickett357 03-24-2015 08:21 PM
To be determined... testing THURSDAY...

mrpickett357 03-24-2015 08:27 PM
2 Attachment(s)
From this to this....

Unlimited jd 03-24-2015 08:34 PM
Originally Posted by Zero Patience (Post 4282636)
The Fives were 1.5 ratio, and on boxes, the Sixes 1.61 ratio, and 12" farther back on boxes. It has been running 17 x32" Hering 5 blades.. The fives were installed canted to get the prop shafts even closer. We installed the Sixes straight up to gain a little room and allow 17.5 diameter props to clear each other. The Sixes are on 18 1/2" centers. Rub rail, deck hatches, windshield, bow rail, cabin center headliner left to install. Should be testing by Thursday. Then boat trip this weekend. We installed the slide in mufflers in the tailpipes, should be able to sneak up on the water patrol now. Maybe only hear it coming for 4 miles, instead of 5 miles.
And yes, he wanted to keep those heavy, antique, obsolete, slow, heavy, heavy, big Ass flaps��
By canted, do you mean they were closer than the engines, and the driveshafts had inward angles ?

Zero Patience 03-25-2015 05:33 AM
Originally Posted by Unlimited jd (Post 4283420)
By canted, do you mean they were closer than the engines, and the driveshafts had inward angles ?
Yes, correct. This boat was built to race in Europe. Rough Water, they wanted the props as close as possible. I have seen outboards done that way also. I don't think there was a speed advantage, only to get, keep the prop in the water sooner. The driveshafts must run in an Un parallel plane in any application, they can not be straight or in alignment.

frickstyle 03-25-2015 05:46 AM
Originally Posted by mrpickett357 (Post 4283412)
To be determined... testing THURSDAY...
More interested in how it ran with the 5s, need to start with a prop. I think I know what I need, but your old setup would help me there. (Power, RPM, Pitch) Don't really care about speed, just want to prop this to run about 5800RPM max with correct pitch. Thanks.

Zero Patience 03-25-2015 05:48 AM
Originally Posted by frickstyle (Post 4283169)
Maybe you posted this already, but with the 5s - power, RPM, prop size please?
MRP can reply, but when he got it, the Fives had 4 blade, 32 x 17 dia. They slipped a lot, 5600 and 5100 @86 mph.
Then we removed a T-shirt from between the carb adapter and blower! It picked up then then to 91. Added 5 blade herings and slip went down, added intercoolers and boost. Speed was then in low to mid 90s. But the cruise 3500 came up about 5 mph. Much more useful. We set our boats up for the best cruise, over top speed. We run long distances at 3500, and get better mileage than CCs, and we are running twice the speed.
The Chiefs make 1000 each, on Tommys Dyno.

frickstyle 03-25-2015 05:56 AM
Thank you. 5-blades were 32 pitch x 17" dia also?

Zero Patience 03-25-2015 06:29 AM
1 Attachment(s)
Originally Posted by frickstyle (Post 4283517)
Thank you. 5-blades were 32 pitch x 17" dia also?
Yes, 18 rake. I'm sure they will be for sale Friday.

I run 17.75 x 32 x 15 rake, Mercury Racing 5 blade on mine.

frickstyle 03-25-2015 07:04 AM
OK, I may be interested. Any way to tell if they have "cup" as I've heard from another member, that really helped to get the prop to bite and lift up on plane.


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