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Recent content by sbmar

  1. sbmar

    Hydraulic Drive vs. Direct drive vs, Diesel Electric Drive -- Overall Efficiency Comparison

    Steven, Thank you for taking the time to post some input. You are 100% right, every component in the system that could generate any pressure drop will also create some heat and also means some loss of efficiency.. It really all come down to whether the basic simplicity of a Hydraulic system...
  2. sbmar

    Hydraulic Drive vs. Direct drive vs, Diesel Electric Drive -- Overall Efficiency Comparison

    Hopefully I came to the right place for some qualified information on hybrid drive system comparisons. I am looking for opinions and information from "others" based on their experiences. Our business is all based around marine power systems for both vessel propulsion and auxiliary/ancillary...
  3. sbmar

    Idle Validation

    Gentlemen: I feel kind of embarrassed asking this question (I should know the answer) but after about 10 years and have not received an answer that makes any sense I am going to try here… On electronically controlled diesel engines, such as in a line haul truck, what is the intended purpose...
  4. sbmar

    Dielectric Joint Compounds

    Gentlemen: Hopefully this is the right place for this-------I have been struggling with coming up with a plausible explanation (in layman terms) as to defining a particular trait that dielectrics or "near" dielectrics" seem to possess when applied in-between, or on to electrically conductive...
  5. sbmar

    Dielectric Compounds

    Gentlemen: Hopefully this is the right place for this-------I have been struggling with coming up with a plausible explanation (in layman terms) as to defining a particular trait that dielectrics or “near” dielectrics” seem to possess when applied in-between, or on to electrically...
  6. sbmar

    Intake Silencing

    ISZ, The word "Helmholtz" was the key-- A quick search and I came up with this past thread. Exactly what I was looking for to get me started. http://www.eng-tips.com/viewthread.cfm?qid=94353&page=1 Thanks and Happy Hoilidays, Tony Athens http://www.sbmar.com
  7. sbmar

    Intake Silencing

    Gentlemen: Does anyone out there have any formulas for intake pipe length and/or diameters that can be used between the intake manifold and an air cleaner on a NA 4-stoke diesel to help silence the intake noise/pulses.. I believe I read something about this once and I am curious if someone else...
  8. sbmar

    Designing an exhaust system

    I do not know if this link will help, but possibly you may glean a bit form it. We have beed designing and building marine exhaust systems for well over 20 years and have learned a bit our self that we like to share... http://sbmar.com/Articles/Exhaust_Introduction.cfm Good readin', I...
  9. sbmar

    Cat C9 cooling

    Setting up custom keel cooling on an engine such as the C-9 will depend upon the rating and the application.. Lower HP levels and low duty cycles may allow you to use used single flow circuits, but if you are asking fo higher output levels in the 50-60+ HP per liter range , you most likely will...
  10. sbmar

    Rubber Lube

    I am doing a side project and know little to nothing about two chemicals that we are working with. I hope I came to the right place to get me on a track that will allow me to do some more testing.... My goal is to come up with a lubricant for a rubber impeller made of neoprene that operates in a...
  11. sbmar

    Q: turbocharger sizing, diesel vs. gasser

    Just a quickie---We work, on a daily basis, w/ diesels that average 60-70+HP per liter at rated outputs. Turbo charging and low temp aftercooling has played an enormous part in allowing these types of outputs to become realistic and reliable.. As for "low-end" power/torque, again the turbo...
  12. sbmar

    World's Fastest Diesel

    Pretty impressive, but keep in mind this is a "one off" situation with loads of R&D and advertising bucks in the budget..Also, life expectency is measurered seconds and not hours.................If you really want to see where #2 is going and where technology has taken diesel, look at the...
  13. sbmar

    Lowest feasible specific fuel consumption

    Smokey, I'd like to express a concern with your post as to BSFC, non-turbo, and maybe a 2-stroke............I do not dwell on what might be, but do have a good understanding of what is in the marketplace currently.. Your thoughts seem quite different to what is actually at the cutting edge of...
  14. sbmar

    Exhaust back pressure

    Mike, Negative pressures are very possible and if I could figure out how to post a picture here of how the underwater part works, I'd do it--Maybe then, are non-believers, could become "born again".. A typical vessel that may see a negative pressure on will only go negative above certain...
  15. sbmar

    Exhaust back pressure

    Rob, We test approx 50 engines a year, have been doing so for over 15 yrs, and we are quite confident in our methods and test results. We typically use a Magnehelic differential gauge backed up with a Fluke digital and measure in both water column and Hg.. Our test procedures allow use "to see"...
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