C28 -> C30

[Cutwater28GG]

also are you all using the 435HP engine and not the 370?

 

[asm777]

I believe most of us who posted are running the D6-435.

Per an earlier question, my recollection is that the 435 became standard sometime in 2016. It was an "option" on our 2016 model that was purchased in 2015. I remember hearing that the 435 was made standard because the 370 wasn't producing enough power when operated at high elevation?

Hope that helps!

 

[Cutwater28GG]

yes. im only interested in the 435 models. there are a few used 370's for sale at good prices.

 

[serpa4]

We sleep head to bow in C30 -- it's much wider there for shoulders, etc. Haven't tried the other way but I don't think it would work. Agree that the OB engines are appealing at times. OTOH, going faster than 20 knots (or maybe even 10 🙂 is pretty risky with logs here in the PNW.

asm777: your numbers are very low compared to our experience (with a new boat for 4 months) and make me wonder about load, prop, bottom growth, etc. FWIW, here is a photo I took at WOT and 22GPH fuel flow -- where it hit 27 knots (note that's definitely on the high end, as I had a following current of 2 knots or so IIRC): http://www.tugnuts.com/gallery2.php?g2_itemId=70237&g2_imageViewsIndex=1

We also did a fresh water head conversion, using the toilet conversion kit. That has been excellent at reducing odors, and we don't miss the fresh water at all (although we also drink bottled water, not tank water).

What are the details of the fresh water head conversion? Is there a kit or just follow some online instructions?
I have a 2018 C30 Sedan I'll be picking up in a week.

 

[serpa4]

ASM777 you may want to get your prop "tuned". It'll run you about $350 at most marinas. We did ours and found all our numbers got better. About 2-3 Kts faster and about a 5-8% decrease in full burn at WOT. Just throwing that out there for you.

Why did you get it tuned? Did you suspect hitting something or RPM off at WOT?
How would you know you need/want to tune your propeller?

 

[pleeson]

Hey Gavin, where is this beige C30 diesel listed for sale? I can't find it. I don't like the light colours at all but for the right deal I'd go for it. Also looking to move up from my 28 but don't have plus 300 K US to spend!

 

[serpa4]

asm777: your numbers are very low compared to our experience (with a new boat for 4 months) and make me wonder about load, prop, bottom growth, etc. FWIW, here is a photo I took at WOT and 22GPH fuel flow -- where it hit 27 knots (note that's definitely on the high end, as I had a following current of 2 knots or so IIRC): http://www.tugnuts.com/gallery2.php?g2_itemId=70237&g2_imageViewsIndex=1

Wow, 27 knots is really good! Noticed you're running at 3620 RPMs. Maybe the C30S is set up differently than the C30CB? Our WOT is at 3500 RPMs... maybe a different prop?

Was your C30S "lightly" loaded or with lots of people/gear? In addition to the additional weight of the flybridge, we normally have a RIB and motor hanging off the swimstep, an extra anchor and chain in the lazarette, 1/2-full tank of diesel (80-170 gallons = 570~1,200 lbs), and usually 2-3 divers with scuba gear and tanks (usually 2-6 tanks weighing up to 40+ lbs each)...

But definitely a factor to consider when comparing the C30S and the C30CB for performance... our numbers are also after having completed the trim tab fin modification posted about by BB Marine (viewtopic.php?f=24&t=9262&p=68085). Before that, it was a struggle getting and staying on plane when fully loaded!

On my test run on my C30 (lightly loaded) I saw 3600 also.