chriscraft254
Commander
- Joined
- Jun 4, 2011
- Messages
- 2,445
Re: '77 Luhrs 28 ft. diesel repower SPLASHED!
Hey man, just read this thread all the way through. You did a good job getting that old beast on the water again. It amazes me how many people here didn't warn you that deisel wasn't going to push that heavy right! And the ones that say its fast enough obviously haven't had to outrun a storm in heavy seas. You need more HP, plain and simple.
To give you an idea of the 350 gasser performance, I am running a 350 with a 325 hp rating. My boat length is at 26'8" with out the bow pulpit or stern platform. It weighs in fully loaded with a couple people on board at about 8000 lbs. I see 42 to 43 mph tops. Of coarse mine is an I/O which is going to see more speed anyway. My point is, for your hull, (imo) you need to go back to the 360 or even better a 454. Yes you might have to change transmissions etc for the 454, but might be worth it in the end. Yes,it will burn more fuel than the 350 but not much because your boat would make that 350 or 360 work much harder than the 454 would. I don't think a 260 hp 350 gasser is going to gain you much. If you do go the 350 route, get a high HP motor. May cost you a bit more up front, but the extra Hp is needed here.
Like others have said though, re-proping and getting those rpms up will definately help with what you have. I wouldn't do that without mufflering that motor though. That thing is LOUD! Good luck with whatever you decide to do.
Budd
Hey man, just read this thread all the way through. You did a good job getting that old beast on the water again. It amazes me how many people here didn't warn you that deisel wasn't going to push that heavy right! And the ones that say its fast enough obviously haven't had to outrun a storm in heavy seas. You need more HP, plain and simple.
To give you an idea of the 350 gasser performance, I am running a 350 with a 325 hp rating. My boat length is at 26'8" with out the bow pulpit or stern platform. It weighs in fully loaded with a couple people on board at about 8000 lbs. I see 42 to 43 mph tops. Of coarse mine is an I/O which is going to see more speed anyway. My point is, for your hull, (imo) you need to go back to the 360 or even better a 454. Yes you might have to change transmissions etc for the 454, but might be worth it in the end. Yes,it will burn more fuel than the 350 but not much because your boat would make that 350 or 360 work much harder than the 454 would. I don't think a 260 hp 350 gasser is going to gain you much. If you do go the 350 route, get a high HP motor. May cost you a bit more up front, but the extra Hp is needed here.
Like others have said though, re-proping and getting those rpms up will definately help with what you have. I wouldn't do that without mufflering that motor though. That thing is LOUD! Good luck with whatever you decide to do.
Budd
