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Diesel-Powered 52-foot Outerlimits Hits 94 mph

Old 05-05-2012, 12:38 PM
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Excellent job to the entire OL crew..that is awesome..94mph out of a 52' long boat..closest thing out there is the 50 Hustler at around 87mph..much smaller boat...and the heavier 52' NT at 76mph....

Im curious with a pair..would 82mph be obtainable...very cost effective package.

Any engine bay shots.. Thanks Jeff
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Old 05-05-2012, 01:14 PM
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Originally Posted by bravo 1
thats awesome, what do u think a single 1000HP and 1600ftlbs cummins would do in a a 29 foot tunnel hull
It would need a 10 speed gearbox from a truck to come in plane ,or it will set the world in smoke !
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Old 05-05-2012, 01:19 PM
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Originally Posted by Dean Ferry
Impressive!

Matt, do you know the displacement weight?
Thanks,
Dean
Dean,

I don't but I'll find out and report back on Monday. That said, I suspect that even with epoxy/carbon/kevlar lay-up it's a hefty beast, which will make the performance that much more impressive. Stay tuned.

Funny thing ... I just talked my girlfriend out of a diesel BMW and into a gasoline version of the same model. I need to loose my anti-diesel bias!
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Old 05-05-2012, 01:32 PM
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Does it have triples or quads?
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Old 05-05-2012, 01:43 PM
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Originally Posted by bravo 1
thats awesome, what do u think a single 1000HP and 1600ftlbs cummins would do in a a 29 foot tunnel hull
I doubt if the boat would like all that weight back there. With the motor, transmission and drive, would be over 2000lbs probly.
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Old 05-05-2012, 01:48 PM
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"...Funny thing ... I just talked my girlfriend out of a diesel BMW and into a gasoline version of the same model. I need to lose my anti-diesel bias!" [Fixed your typo]


Yes that was a mistake. You won't find a cleaner, more powerful car diesel than the 3.0L BMW engine. 35mpg is hard to match with the gas motor...in fact it can't be done. Less than 7sec to 60 with a diesel is not too shabby either.
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Old 05-05-2012, 01:53 PM
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Originally Posted by Jassman
Excellent job to the entire OL crew..that is awesome..94mph out of a 52' long boat..closest thing out there is the 50 Hustler at around 87mph..much smaller boat...and the heavier 52' NT at 76mph....

Im curious with a pair..would 82mph be obtainable...very cost effective package.

Any engine bay shots.. Thanks Jeff
I think 82 would be doable with staggered twin FPT650s. Probly run mid 90s with 850s but those are race engines...
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Old 05-05-2012, 01:56 PM
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Originally Posted by rbr2328
Does it have triples or quads?
Trips.
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Old 05-05-2012, 02:51 PM
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Originally Posted by Steve 1
The other thing here is an inline 6 has perfect primary and secondary balance, which is another reason they run so long , aside from a ton of fewer moving parts that like to fail.
So does a 90* V8 with a 90* crank.

I hate to say it, but this inline-6 is better than V8 is urban legend. I spoke to a Cummins engineer once, and asked him about why they use I6's instead of V8's. His response was "packaging", and slight cost reduction. There have been V8 diesel marine engines over the years by Catapillar, Cummins, and others, that ran just fine.

Michael
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Old 05-05-2012, 03:11 PM
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Originally Posted by 89scarabIII
Diesels are meant to be inline engine, much more reliable, cummins was a good choice lots of guys converting ford to cummins for the reliability.
The only benefit is that they are naturally balanced. Theoretically that MIGHT add up to a marginal improvement in the life of accessories due to reduced vibration. But in practice, it doesn't make a difference.

At Cat we use 90* V's instead of 60*. A 60* would be perfectly balanced in a V12 configuration. But with the 90* we can have better harmonics in V8, V16, and V20 configurations. It's a compromise.
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