35 Flame with 600 sci
11-17-2008 | 08:27 PM
#21
Off the Radar
Joined: May 2001
Posts: 1,097
Likes: 1
From: Cape Coral, FL or Colonial Beach, VA
Hey Dave,
My 32's are labbed. I tested the boat this past Sept. with Tres Martin where slightly less trim (5.5 vs 6.5) and slightly more tab (5vs4.5) achieved the best top end numbers. I have always had the tendency to over trim and under tab.
Decided to add the 380 K-planes (longer than the stock 280's) and try a 31 labbed Hydro five blade. The longer K-planes should extend the boat enough to deduce tab influence and grab another couple MPH?
In the end, the 35 Nordic is one of the fastest 35' Vee Hulls you'll find in production, the 600's will make it even faster.
NG
My 32's are labbed. I tested the boat this past Sept. with Tres Martin where slightly less trim (5.5 vs 6.5) and slightly more tab (5vs4.5) achieved the best top end numbers. I have always had the tendency to over trim and under tab.
Decided to add the 380 K-planes (longer than the stock 280's) and try a 31 labbed Hydro five blade. The longer K-planes should extend the boat enough to deduce tab influence and grab another couple MPH?
In the end, the 35 Nordic is one of the fastest 35' Vee Hulls you'll find in production, the 600's will make it even faster.
NG
I think the slip will go down to the 8-9% range. I would think that you would need 29's to keep acceleration & top speed. Most people, which is few I know, went down 2-3 prop sizes to get the Hydro's to keep the same rpm. Most lost 1-2 top MPH but gained 5 mph cruise. With the better bite, I have stayed away to help keep the drive stress down. I get into large water too often.
I hope it all works, The recomendations come from much more experience than I. You are crossing new concepts.
11-17-2008 | 09:05 PM
#22
Chris
Joined: Sep 2005
Posts: 1,426
Likes: 1
From: Snohomish, WA
I believe that Tim from OCM tried a set of 5 blade hydro's on his carbon-fiber 35 (with 525's), and did not like them. Said he liked the Bravo's better. He then tried a set of 29 Hering five blades, and said they were magic !
I tried one of his Hering 29's on my Heat and could not turn it past 4800 rpm. But.... The boat was faster at 3K and 4K by 7mph over any other prop. I was also only 1.5 mph slower on the top end than my labbed and tweeked Bravo 28 at 5400 rpm. I ordered a 27 five blade Hering.
I am now a Hering Believer!
Chris
P.S. I also agree that the 28 Bravo is the most efficient prop of the Bravo line. I can consistantly get this prop into 10.8% - 11.6% slip numbers on my boat. The Hering posted 9.3% slip. The P5x's were consistantly about 12.5%
I tried one of his Hering 29's on my Heat and could not turn it past 4800 rpm. But.... The boat was faster at 3K and 4K by 7mph over any other prop. I was also only 1.5 mph slower on the top end than my labbed and tweeked Bravo 28 at 5400 rpm. I ordered a 27 five blade Hering.
I am now a Hering Believer!
Chris
P.S. I also agree that the 28 Bravo is the most efficient prop of the Bravo line. I can consistantly get this prop into 10.8% - 11.6% slip numbers on my boat. The Hering posted 9.3% slip. The P5x's were consistantly about 12.5%
Last edited by CB-BLR; 11-17-2008 at 09:37 PM.
11-18-2008 | 07:19 AM
#23
Registered
Joined: Mar 2002
Posts: 1,546
Likes: 4
From: Layton, Utah
Linnie (or anyone),
Some more food for thought here...
My 496HOs are very heavy motors. My new 588s will weigh in much less by nature; I'm thinking in the neighborhood of 175 lbs a side.
This leaves me wondering if I'll need to have more cup for bow lift beings the tail will have more natural transom lift.
Anyone know how or if the Ilmor Flame reacted differently?
Dave
Some more food for thought here...
My 496HOs are very heavy motors. My new 588s will weigh in much less by nature; I'm thinking in the neighborhood of 175 lbs a side.
This leaves me wondering if I'll need to have more cup for bow lift beings the tail will have more natural transom lift.
Anyone know how or if the Ilmor Flame reacted differently?
Dave
11-18-2008 | 01:52 PM
#25
Registered
Joined: Apr 2007
Posts: 272
Likes: 0
From: Cartersville, GA
Linnie (or anyone),
Some more food for thought here...
My 496HOs are very heavy motors. My new 588s will weigh in much less by nature; I'm thinking in the neighborhood of 175 lbs a side.
This leaves me wondering if I'll need to have more cup for bow lift beings the tail will have more natural transom lift.
Anyone know how or if the Ilmor Flame reacted differently?
Dave
Some more food for thought here...
My 496HOs are very heavy motors. My new 588s will weigh in much less by nature; I'm thinking in the neighborhood of 175 lbs a side.
This leaves me wondering if I'll need to have more cup for bow lift beings the tail will have more natural transom lift.
Anyone know how or if the Ilmor Flame reacted differently?
Dave
11-18-2008 | 02:34 PM
#26
Off the Radar
Joined: May 2001
Posts: 1,097
Likes: 1
From: Cape Coral, FL or Colonial Beach, VA
Dave,
When they lab them they thin them, I think too much. They also take the cup from.040 to 0.60 from what I 've been told. The mercury labbed 30's Gary gave me with my boat worked best. At that point, i was still on the James river that has some debris. I sent them off to another company to get fuixed & they never worked right. I sold them & bought stock. I just got them back but only had them half thinned. Not run them & it looks to cold to now,.
When they lab them they thin them, I think too much. They also take the cup from.040 to 0.60 from what I 've been told. The mercury labbed 30's Gary gave me with my boat worked best. At that point, i was still on the James river that has some debris. I sent them off to another company to get fuixed & they never worked right. I sold them & bought stock. I just got them back but only had them half thinned. Not run them & it looks to cold to now,.
