Ughhh...I'm under-propped
- Big Block Power
- Fleet Admiral
- Posts: 17910
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Ughhh...I'm under-propped
I agree with what matt is saying. Get a set of 24's for alt and go boating. You are where you need to be at sealevel. I'm not a huge fan of the merc b3 props. Hills bravo props are nice but not sure what you will gain. You might gain a bit better hole shot maybe a mph but that's hard too say. I had really bad luck with them on my Volvo.
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
-
- Ensign
- Posts: 3
- Joined: Wed Apr 18, 2018 11:57 am
- Location: San Francisco Bay Area
- Contact:
Re: Ughhh...I'm under-propped
Thanks BBP and cmattj! Matt, you're brave being out on the Delta--I used to ski there with friends but was turned off by water quality and boater quality!
I actually think my prop set up is for Tahoe--that's where the boat was originally purchased. And topping out at 48-50 mph seems low. I'll have to check how she performs at Tahoe, and continue to gather data on prop slip as well. Didn't understand your comment about "get your gear"--gear ratio is 2.0. Even if she is under-propped at low elevation, I can't complain if I have people and gear on board and can still do 50. But thinking I might want to make some runs from Antioch to Sac (like for lunch jaunts), and would rather have the ability to really max out the performance. Guess I may just need to play around with options. Was hoping to just nail down something like, "Oh, you can go to 30 for the low elevation," and then just go find those used...Life is never that easy!
I actually think my prop set up is for Tahoe--that's where the boat was originally purchased. And topping out at 48-50 mph seems low. I'll have to check how she performs at Tahoe, and continue to gather data on prop slip as well. Didn't understand your comment about "get your gear"--gear ratio is 2.0. Even if she is under-propped at low elevation, I can't complain if I have people and gear on board and can still do 50. But thinking I might want to make some runs from Antioch to Sac (like for lunch jaunts), and would rather have the ability to really max out the performance. Guess I may just need to play around with options. Was hoping to just nail down something like, "Oh, you can go to 30 for the low elevation," and then just go find those used...Life is never that easy!
Dave Miller
2007 Cobalt 232
496 Mag/2.0/Bravo 3 26p
2007 Cobalt 232
496 Mag/2.0/Bravo 3 26p
Re: Ughhh...I'm under-propped
I hear you.. the 80's where a different time on the Delta.. but things have improved since then. Tahoe is beautiful but we like to swim in warm water, and the activities on the Delta are fun
Cmon that was funny!
Your close on your set up. But when you mentioned your only getting 4600 rpm to 4800 I felt your not seeing the rev limiter yet.DMillerJD wrote: ↑Tue Apr 24, 2018 1:11 pm
I actually think my prop set up is for Tahoe--that's where the boat was originally purchased. And topping out at 48-50 mph seems low. I'll have to check how she performs at Tahoe, and continue to gather data on prop slip as well. Didn't understand your comment about "get your gear"--gear ratio is 2.0. Even if she is under-propped at low elevation, I can't complain if I have people and gear on board and can still do 50. But thinking I might want to make some runs from Antioch to Sac (like for lunch jaunts), and would rather have the ability to really max out the performance. Guess I may just need to play around with options. Was hoping to just nail down something like, "Oh, you can go to 30 for the low elevation," and then just go find those used...Life is never that easy!
Most 496 ( 375hp) vs 496ho would most likely have a 1.81 gear Or the 2.2 for high elevation. So maybe some already put a 26p on it?
It shows a 24p was stock so maybe run the serial number to see if it's actually a 2.2?
By trying a steeper raked prop you'll add a lower overall effective ratio but it can now struggle because the blade angle is so steep. ( gets sluggish ) you don't have the power to pull it.
28p are a realistic option ( available)but I would make sure you can achieve maximum rpm now ( you should be able to feel the rpm limiter after holding wide open for just under a minute and trimmed) with the current combo.
Here is a Cobalt sheet from your model. Or you can call Cobalt to see how she was built for its destination.
Make another outing then we'll go prop shopping!
You do not have the required permissions to view the files attached to this post.
2008 272 , 496 HO fo SHO
California Delta
Table Rock Lake
#FARCON
California Delta
Table Rock Lake
#FARCON
Re: Ughhh...I'm under-propped
Just checking in to see what you came up with? A lot of prop talk going on these days.DMillerJD wrote: ↑Tue Apr 24, 2018 1:11 pm
But thinking I might want to make some runs from Antioch to Sac (like for lunch jaunts), and would rather have the ability to really max out the performance. Guess I may just need to play around with options. Was hoping to just nail down something like, "Oh, you can go to 30 for the low elevation," and then just go find those used...Life is never that easy!
2008 272 , 496 HO fo SHO
California Delta
Table Rock Lake
#FARCON
California Delta
Table Rock Lake
#FARCON
- Big Block Power
- Fleet Admiral
- Posts: 17910
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Ughhh...I'm under-propped
Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Re: Ughhh...I'm under-propped
Everyone knows You don't glow from high mercury levels in the water .. geeeze.Big Block Power wrote: ↑Mon Apr 30, 2018 7:58 pm Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao
You just start craving 80s disco music and polyester .
2008 272 , 496 HO fo SHO
California Delta
Table Rock Lake
#FARCON
California Delta
Table Rock Lake
#FARCON
- Big Block Power
- Fleet Admiral
- Posts: 17910
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Ughhh...I'm under-propped
That's awesome. Your delta must be like our paper mill infested pcb polluted water here. We have lots of two headed fish.cmattj wrote: ↑Mon Apr 30, 2018 8:27 pmEveryone knows You don't glow from high mercury levels in the water .. geeeze.Big Block Power wrote: ↑Mon Apr 30, 2018 7:58 pm Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao
You just start craving 80s disco music and polyester .
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Re: Ughhh...I'm under-propped
Killin me!! As I explain to my grandkids... " no that's not a flounder, and fish are only supposed to have 2 eyes.Big Block Power wrote: ↑Mon Apr 30, 2018 8:37 pm
That's awesome. Your delta must be like our paper mill infested pcb polluted water here. We have lots of two headed fish.
2008 272 , 496 HO fo SHO
California Delta
Table Rock Lake
#FARCON
California Delta
Table Rock Lake
#FARCON
- Big Block Power
- Fleet Admiral
- Posts: 17910
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Ughhh...I'm under-propped
Flounder wasn't he in a movie?
Called
Where the Delta meets the Pcb's
Ok Animal House!
Called
Where the Delta meets the Pcb's
Ok Animal House!
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Re: Ughhh...I'm under-propped
“Fat, drunk and stupid is no way to go through life”
Dean Wormer Quote.
Dean Wormer Quote.
2007 212 5.0 GXi DP Volvo Penta
Tubing, Skiing, and all around boating fun!
Texas Sun & Fun!
2016 Yamaha VX Cruiser
Tubing, Skiing, and all around boating fun!
Texas Sun & Fun!
2016 Yamaha VX Cruiser
- Big Block Power
- Fleet Admiral
- Posts: 17910
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Ughhh...I'm under-propped
Loce it. Going to have to break out that movie.
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Who is online
Users browsing this forum: No registered users and 0 guests