Ughhh...I'm under-propped

[Big Block Power]

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.

[DMillerJD]

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!

[cmattj]

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 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!

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!

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.

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!

[cmattj]

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!

Just checking in to see what you came up with? A lot of prop talk going on these days.

[Big Block Power]

Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao

[cmattj]

Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao

Everyone knows You don't glow from high mercury levels in the water .. geeeze.

You just start craving 80s disco music and polyester .

[Big Block Power]

Hey Matt are you still glowing from being in that delta. Alien Matt!!! Lmao

Everyone knows You don't glow from high mercury levels in the water .. geeeze.

You just start craving 80s disco music and polyester .

That's awesome. Your delta must be like our paper mill infested pcb polluted water here. We have lots of two headed fish.

[cmattj]

That's awesome. Your delta must be like our paper mill infested pcb polluted water here. We have lots of two headed fish.

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]

Flounder wasn't he in a movie?
Called
Where the Delta meets the Pcb's
Ok Animal House!

[Bobo87]

“Fat, drunk and stupid is no way to go through life”

Dean Wormer Quote.

[Big Block Power]

Loce it. Going to have to break out that movie.