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    So we are back to what I have said a million...

    So we are back to what I have said a million times, we just have to be patient and wait until you are able to release the test data. That is fine :)

    I will say this. If you do achieve 60-70%...
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    You still haven't come out and said "Our engine...

    You still haven't come out and said "Our engine is twice as efficient as a conventional engine when operating at 4000rpm". This is what you imply, but have not said. This would imply your engine...
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    There is obviously a fine line he has to tread...

    There is obviously a fine line he has to tread there. He has made the claim about the same fuel consumption at 2000 and 4000rpm. We have simply asked what exactly does he mean by that. Does that mean...
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    I'm a specialist in the area of machine design. I...

    I'm a specialist in the area of machine design. I model equipment in Solid Edge and analyse the stresses in ANSYS (finite element analysis). I design large industrial equipment, the automotive area...
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    I know how large companies work, I work for one...

    I know how large companies work, I work for one of the worlds largest engineering consultancies.

    The data I am asking for isn't exactly going to give your design away. So it looks like we are back...
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    I'll assume that the fact you can't produce such...

    I'll assume that the fact you can't produce such simple fuel consumption figures means that you haven't actually had this tested and therefore do not have figures to quote.

    And;



    Can you...
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    I think the Torque vs Power discussion should be...

    I think the Torque vs Power discussion should be taken to a different thread. It is subjective and will go on forever.

    Brad,

    Just fill in the blanks below so we know what your saying with...
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    The book is 100's of pages, it has a ridiculous...

    The book is 100's of pages, it has a ridiculous amount of research and work put into it. There's a lot more air cooled engines in the world than just the VW engine you know.

    If you want a source...
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    It is the industry accepted rule of thumb. That...

    It is the industry accepted rule of thumb. That is why I called it a rule of thumb.

    Besides, you can find the same thing quoted on the Colorado State University Internal combustion engines...
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    As a rule of thumb, roughly 1/3 of the energy...

    As a rule of thumb, roughly 1/3 of the energy makes it through as power (similar to your Prius quote), 1/3 is lost out the exhaust and 1/3 is lost through the cooling system.

    It is because an...
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    It's good to see someone agrees. If you are...

    It's good to see someone agrees.

    If you are making twice the power with a certain amount of fuel at one rpm compared to another then one rpm must be burning it twice as efficiently than the other....
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    And I think your problem is your making claims...

    And I think your problem is your making claims that you haven't backed up in testing. So we will just go around and around in circles until you post some reliable test data.

    For you to get twice...
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    Perhaps your memory is a little short. Let me...

    Perhaps your memory is a little short. Let me remind you what you said.

    On page 9 you said

    I haven't seen those figures released yet, so at the moment the crazy claim that you use the same...
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    There is still no evidence of anything, so no...

    There is still no evidence of anything, so no point to discussing this engine at this time.

    At the moment the size and weight claims have not been proven. The X4 is an aircraft engine and should...
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    Stian, Revetec have said they don't have the...

    Stian,

    Revetec have said they don't have the 3:1 gearing anymore (giving 3 times the torque at 1/3 the rpm, therefore the SAME power). They have said that was outdated information on their...
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    Brad, What exactly was in the paper? The graph...

    Brad,

    What exactly was in the paper? The graph is fine, we agree with the graph.

    It was the interpretation of the graph and the rpm at a certain speed for a certain gear that is wrong.

    As I...
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    Where did that graph come from? And how did you...

    Where did that graph come from? And how did you come up with those gear speed to rpm conversions?

    The graph says it is a 3L V6 Taurus, but not whether it is the Vulcan motor;
    12 valves 3.0L V6...
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    I agree (and said the same thing pages ago). We...

    I agree (and said the same thing pages ago). We can argue theory forever, but what we need is some actual test data on this engine.

    Manolis, thanks for the offer on the Roadload program....
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    No, we just don't quite understand what each...

    No, we just don't quite understand what each other is saying. I like what I said, that's why I wrote it :p



    So why do some manufacturers put in an overdrive that makes the engine sit on...
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    Yeah, it is a pity mine needs Excel. I have been...

    Yeah, it is a pity mine needs Excel. I have been learning VBA to make it a stand alone program. :)



    Ah, that's what we need. You can see that engine is actually at it's most efficient at medium...
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    I agree with that too, which is why I said "If...

    I agree with that too, which is why I said "If you cruise at a rpm lower or higher than the optimum, then you will use more fuel" (as you quoted). No-one is debating any of those statements.

    The...
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    Just be careful, that table above may be a little...

    Just be careful, that table above may be a little misleading.

    Just because a gearbox has a 1:1 ratio doesn't mean it is the type of 1:1 ratio that locks the input shaft and output shaft together...
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    My Excel program does exactly the same thing, but...

    My Excel program does exactly the same thing, but is a bit easier to use (DOS programs aren't very user friendly :) ).



    That is exactly what I was saying! :)



    Brad, as I said above, you...
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    That is the reason why your perspective is...

    That is the reason why your perspective is somewhat distorted. A big V8 is more efficient at low rpm, they are torque monsters :D

    I drive a 1968 VW Baja, with a 1992 Mazda MX6 quad cam V6 in the...
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    When I was talking efficiency above, I was...

    When I was talking efficiency above, I was talking fuel efficiency. Try looking up brake specific fuel consumption. Engines have an efficiency point (curve/map really). Some engines have it low in...
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