Seastoke
Well-Known Member
So what revs would you expect to plane at , thanks for replies
Volvo D6 370HP 42 ft boat
- Thread starter Seastoke
- Start date
Whitelighter
Well-Known Member
Are you going up or coming down?
Getting on the plane you need more power to get over the hump then throttle back. I guess to get her going I’d expect some where around 3000rpm initially, then once the boat is fully planing you can throttle back and I’d expect the plane to be maintained down to 2200 ish, depending on weight and configuration. This assumes a shaft drive fb boat.
Stern drive sports cruiser where thrust can be vectored and weight likely less I would expect fewer rpm required
Getting on the plane you need more power to get over the hump then throttle back. I guess to get her going I’d expect some where around 3000rpm initially, then once the boat is fully planing you can throttle back and I’d expect the plane to be maintained down to 2200 ish, depending on weight and configuration. This assumes a shaft drive fb boat.
Stern drive sports cruiser where thrust can be vectored and weight likely less I would expect fewer rpm required
Portofino
Well-Known Member
I’d be thinking what ever rpm the forced induction apparatus kicks in then add another 100 rpm .
Your forced induction highly likely a turbo and possibly ( without looking specifically up ) an initial supercharger boost .
Based on previous experience of a KAD 300 north of 2700 rpm towards 2800 for it to pop up and plane .
370 Hp in a 42 ftr is a bit weak imho ,of course I say this blind of the actual boat and displacement.
Naturally if we are drip fed more relevant info I reserve the right to adjust those figures .
Your forced induction highly likely a turbo and possibly ( without looking specifically up ) an initial supercharger boost .
Based on previous experience of a KAD 300 north of 2700 rpm towards 2800 for it to pop up and plane .
370 Hp in a 42 ftr is a bit weak imho ,of course I say this blind of the actual boat and displacement.
Naturally if we are drip fed more relevant info I reserve the right to adjust those figures .
Whitelighter
Well-Known Member
no supercharger on the D series - just turbo.
it cant be tuned so works the same weather you drop a single D6 in a 30ft sports boat or run 2 in a 45ft FB
it cant be tuned so works the same weather you drop a single D6 in a 30ft sports boat or run 2 in a 45ft FB
jimmy_the_builder
Well-Known Member
My D6-350's have both supercharger and turbo.
Seastoke
Well-Known Member
She is a sealing 42/5 on shafts
volvopaul
Well-Known Member
Most sterndrive D 6 and 4 have the super charger in sports boats , oddly the D6 330 in the V39 doesn’t .
Whitelighter
Well-Known Member
That’s me told
jimmy_the_builder
Well-Known Member
Yep iirc the 310 doesn't but the 350 does, and as you say here the 330 doesn't but the 370 does. The 330/370 replaced the earlier 310/350.
Andy Bav
Well-Known Member
Our V42 should reach around 3,400 - 3,500 at wot. D6 370s on outdrives. Later in the season low 3,000’s is the norm..
