Cummins 6BTA 5.9 Performance Build
11-20-2012 | 08:03 PM
#61
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From: Freehold, NJ
Hey you might be right and I'm an old fart past my prime and most things that you higher tech guys now have and know is wayyy beyond me - I agreed that is probably true and accept that.
BUT I would like to see facts, dyno sheets, test data, something to prove your case other than you "think", "should", "know" or "it's cool"
I encourage you to prove me to be an out of touch old fart because if you do then there is hope for high - HP diesels in boats once again and I would love to see that, so far the case is not being made too well.
I'm not trying to be an azz, if my little rebuttals are all it takes for you to become discouraged and walk away with a "good luck" comment than you do not believe in what you're saying, if you did you would defend your position.
11-20-2012 | 08:13 PM
#62
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JD you know why I asked that right? Any race tranny will have a higher than stock stall speed, even stock it's like 800-900 rpms and it takes a little more for full lock-up, right?
The boat is always 100% locked-up there is no stall so you have a propeller with 4 blades that is designed to only have part of one blade in the water at a time, now fully submerged with no way to throw water off the front side of it, it's 4 times the drag plus the water on the front - this is tough on the engine with full lock-up on the trans.
The boat is always 100% locked-up there is no stall so you have a propeller with 4 blades that is designed to only have part of one blade in the water at a time, now fully submerged with no way to throw water off the front side of it, it's 4 times the drag plus the water on the front - this is tough on the engine with full lock-up on the trans.
11-20-2012 | 08:16 PM
#63
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You tell me how you are going to fit all that on an engine, plus a heat exchanger (which you have to run or the cylinders will cavitiate in a short time to swiss cheese), a water cooled after cooler, water cooled manifolds, the plumbing to exhaust the waste gates and still keep 2 engines at 30"-32" a part for side by side installation in a V hull?
I say this because they are longer than a big block, the trans say multispeeds are longer than just plugging in to a bravo, XR or anytype of drive like that adding more over all length. The engines get sooo long you can hardly stagger them without rebuilding the entire cockpit in a already staggered boat.
Just saying, there is more than meets the eye to being able to do something like you suggest and have it workable.
I say this because they are longer than a big block, the trans say multispeeds are longer than just plugging in to a bravo, XR or anytype of drive like that adding more over all length. The engines get sooo long you can hardly stagger them without rebuilding the entire cockpit in a already staggered boat.
Just saying, there is more than meets the eye to being able to do something like you suggest and have it workable.
11-20-2012 | 08:19 PM
#64
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I suggested compounds not for pressure but to have a very wide efficiency range, which would help with any smoke concerns.The waste gates are to keep the needed exhaust flow with tighter turbine housings, and without extreme back pressure or egts. By doing this you can control the pressure, have great spool, low back pressure, low egt's etc I think it would be a little difficult to get a single to make the same power and behave as well.
11-20-2012 | 08:24 PM
#65
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From: Freehold, NJ
All of you that are bantering with me - you all know this is fun for me and here is why.
I am old (not that old 50), I am near broke, I have 3 kids to put through school and lost mostly everything my wife of 27 years and I spent a lifetime building (my fault, no one to blame).
I would like very much to see someone pick-up where we left off and build the diesel powered boat that today can be built and dominate some type of endurance racing, whether it is settings records, poker runs, around LI for Charlie's sake, some resemblence of truely what diesels can do and do it time after time after time.
I am old (not that old 50), I am near broke, I have 3 kids to put through school and lost mostly everything my wife of 27 years and I spent a lifetime building (my fault, no one to blame).
I would like very much to see someone pick-up where we left off and build the diesel powered boat that today can be built and dominate some type of endurance racing, whether it is settings records, poker runs, around LI for Charlie's sake, some resemblence of truely what diesels can do and do it time after time after time.
11-20-2012 | 08:27 PM
#66
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From: Freehold, NJ
Have to tell you that is very clean, a job well done my friend but it proves my point the size alone makes it near impossible for a boat after you add all the other crap that goes with marine engines!
11-20-2012 | 08:44 PM
#67
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From: Traverse City MI
Joe! I also am waiting for someone to spend a little time and make a bad Azz diesel powerboat. I really think there is potential in the diesel performance marine world, and not enough people are working on it.
I love reading your post and one day before I purchase or build a diesel powerboat I for sure will get a hold of you for advice.
Great thread!
I love reading your post and one day before I purchase or build a diesel powerboat I for sure will get a hold of you for advice.
Great thread!
11-20-2012 | 08:46 PM
#68
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11-20-2012 | 09:05 PM
#70
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Hahaha I suppose. I worked on it when I could but did not have the time to do it full time. My good freinds own the shop that did it. I also don't have nearly enough experience to make it look that good.
Last edited by JD Dearden; 11-20-2012 at 09:15 PM.
