Replacement engines

Its not about money as such, its about turning an old girl running a bit sluggish in to something alltogether more agile again. I do it with motorbikes too.
If it was about saving cash, i wouldnt of bought her in the first place....
An example, when i bought my bungalow..... The very first idea i had was to take the roof off and convert to dormer.....
Dont ask me why.....
I could not afford a new 36ft boat that could run 40 plus, this way i can...
Hang on, why doi feel im justifying this to the wife, im not married.... So sod off :)
(the last bit was said in jest :D
 
One thing i could consider if my shafts are not up to the job, is monel.... 30% stronger, pound for pound.
It would save a lot of grief with shaft seals etc etc, as mine are halyard oil lubed...
Apparently they were the dogs danglies, but bloody expensive at the time, and fit and forget....
 
Robg71 said:
One thing i could consider if my shafts are not up to the job, is monel.... 30% stronger, pound for pound.
It would save a lot of grief with shaft seals etc etc, as mine are halyard oil lubed...
Apparently they were the dogs danglies, but bloody expensive at the time, and fit and forget....
Click to expand...

1 1/2 shafting is unlikely to be stainless, monel will do the job at this size, and even more sexy materials such as Duplex, Aqamet 22, sky is the limit!
 
Wow, good job i was sat down on the phone today..
Pair of volvo d6 370..... (41k
Cummins qsb350 50k
Iveco nf60 .... 27k

Eventually somebody did listen to me, and is getting back with price for recon cummins b series...
 
I run a pair of 230 Sabres. Overhauling the injectors and upgrading the lift pumps and fitting a thermostat to the oil cooler made a big difference to the general running and economy. The stbd engine wouldn't make full boost despite checking pipework, turbo etc. Eventually found that the fueling had been screwed down I guess to limit smoke?
Anyway, increased fueling and full boost attained! And less smoke too.

The point I am making is that perhaps a good service and check might give surprising results. I gained 5kts and better consumption.
 
Robg71 said:
Wow, good job i was sat down on the phone today..
Pair of volvo d6 370..... (41k
Cummins qsb350 50k
Iveco nf60 .... 27k

Eventually somebody did listen to me, and is getting back with price for recon cummins b series...
Click to expand...

Who on earth have you been talking to?? also no such rating as QSB 350, there is a 355 rating but pretty much same price as 380 as they are the same CPL so why would you bother...........

Pair of Cummins QSB 480's de-rated to 440 or 425 which will match your gearbox, all same CPL, bobtail with Twin Disc adaptor plate, including looms single station instruments and AV mountings, circa 34k. Not purchased Morse electronic pots for cable control for a while, say £200.

370 power node will do little for you, few knots, lot of pain for little gain. Also NEF is badged 370, only 356 as they use Mickey Mouse 25 Degree C fuel test fuel. Volvopaul may comment re adaptor plate and tosional compatability of MG507 on back of D6.
 
Bassplayer said:
I run a pair of 230 Sabres. Overhauling the injectors and upgrading the lift pumps and fitting a thermostat to the oil cooler made a big difference to the general running and economy. The stbd engine wouldn't make full boost despite checking pipework, turbo etc. Eventually found that the fueling had been screwed down I guess to limit smoke?
Anyway, increased fueling and full boost attained! And less smoke too.

The point I am making is that perhaps a good service and check might give surprising results. I gained 5kts and better consumption.
Click to expand...

Sabre never did a 230 Ford Dover rating?? There was a nice 225 rating using the standard Ford 15.45:1 piston which made it a reasonably lively motor, however you have missed the point OP has Sabre rating with 14.7:1 pistons which were special for Sabre, not FOMOCO parts which is very reason for discussion.

I also expect OP's motors are in decent fettle however with the pretty feeble injection pressure Simms pump puts out 15.45:1 smoked at start up when brand new, the 14.7:1 motors were just a bit worse.
 
Latestarter1 said:
Who on earth have you been talking to?? also no such rating as QSB 350, there is a 355 rating but pretty much same price as 380 as they are the same CPL so why would you bother...........

Pair of Cummins QSB 480's de-rated to 440 or 425 which will match your gearbox, all same CPL, bobtail with Twin Disc adaptor plate, including looms single station instruments and AV mountings, circa 34k. Not purchased Morse electronic pots for cable control for a while, say £200.

370 power node will do little for you, few knots, lot of pain for little gain. Also NEF is badged 370, only 356 as they use Mickey Mouse 25 Degree C fuel test fuel. Volvopaul may comment re adaptor plate and tosional compatability of MG507 on back of D6.
Click to expand...

I think the chap with the ivecos had them in stock and wanted to move them on... Typical
The others were from local companies.
Are the old b series motors still available? I have been told difficult to get hold of.
That price is more like what i had in mind... Not 50k.
Channel islands meant to be vat free...
 
burgundyben said:
Hello chap, what is CPL?
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Ben

Control Parts Listing i.e the recipie of performance parts, cam, piston, cylinder head, which go into an engine build. QSB 230/305/355/380 all CPL 8169.

QSB 425 was CPL 8732, however with the launch of the QSB 480 CPL 1860 two de-rates were developed 440 which nobody buys and a new 425 and CPL 8372 discontinued. End result is engines from 230 all the way to 480 consist of just two families.
 
Robg71 said:
I think the chap with the ivecos had them in stock and wanted to move them on... Typical
The others were from local companies.
Are the old b series motors still available? I have been told difficult to get hold of.
That price is more like what i had in mind... Not 50k.
Channel islands meant to be vat free...
Click to expand...

Older B & C mechanical engines are still available, however their sale in the U.S. is illegal due to EPA legislation. To get around EPA legislation Cummins Reconditioning plant outside U.S. (Mexico) was set up to produce engines sold as reconditioned, however they use 100% new parts. Available ex-stock in Europe, in fact Fairey Swordsman had pair of 370's installed during the summer.

PM me and I will give you correct contact #'s
 
Divemaster1 said:
Would remove the drag limitations P brackets, shafts and rudders represents ... and get propulsion power directly at the line of travel ......

Loose the aft cabin and gain a centre cabin.... should get some serious speed out of that ... may be a nice winter project... :D
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hahha... and i thought i was barking :)

ok, tell me about gearboxes.... mine are (apparently) 1:51:1 whatever that means, is there a specific prop speed / diameter or something...
 
Robg71 said:
hahha... and i thought i was barking :)

ok, tell me about gearboxes.... mine are (apparently) 1:51:1 whatever that means, is there a specific prop speed / diameter or something...
Click to expand...

Engines come with what you need from a gearbox perspective..... :)

Wrote about this many years ago .... http://www.ybw.com/forums/showthread.php?t=14370

Basically removes propellor diameter limitations and thus HP limitations, but replaces it with some wicked cleavers.... :D

... and with nearly 1000 HP on tap, you'll have a "Round Britain" contender..... :)
 
Robg71 said:
hahha... and i thought i was barking :)

ok, tell me about gearboxes.... mine are (apparently) 1:51:1 whatever that means, is there a specific prop speed / diameter or something...
Click to expand...

Rob, you are approching this with a sawn off shotgun..............Take a step backwards.

IF you want to consider using existing boxes with QSB at the prime 480 rating please digest the note I sent you. We have moved a million miles from my original suggestion.

MG 507 is 1.5:1, QSB 480 is 3,400 rpm rating, unlike the 425 which is 3,000 rpm, no clue as to your prop diameter but lets say it is 20 inches, to absorb this power will require hugely oversquare wheel with 30 inch pitch which is less than ideal. We have now moved vessel into 46 knot plus zone with cruise speed of around 43 knots. There is now a need to discuss hull strengh and bottom loading calculations. You have another issue, MG507 is great for absorbing torque, however something in my memory bank tells me that unlike sister boxes it has lower input speed capacity, I will look at Twin Disc capacity tables.

This exercise requires careful planning, put the shotgun away and lets start gathering some data.
 
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