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#91
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Max power depends on what is the limiting factor for your engine. In our turbo-diesels, there is a limit on the air mass flow, via the turbo bypass which limits intake manifold pressure to ~10 psig. There is also a limit in max fuel flow thru the injection pump. But, if your car puts out some smoke at high power, you are already flowing as much fuel as might want. You can get even more power by pouring out thicker smoke, but people behind wouldn't appreciate. See youtube for M-B diesels spinning tires, w/ upgraded injection pumps, if you can see the car thru the smoke. Similarly, for tractor pull contests.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#92
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What is the turbo bypass? The wastegate?
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RenaissanceMan Labs: where the future is being made today. Garage: 2017 Chevy Colorado Diesel (nanny state emissions) 2005 Volvo S40 T5 AWD, 77k 1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg 1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg WARNING: this post may contain dangerous free thinking. |
#93
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Yes. It bypasses exhaust gas around the turbine. There is a rubber hose going from a port on the intake to a diaphragm that acts against a spring. When intake manifold pressure exceeds a setting, a rod moves to begin opening a flapper valve which lets exhaust bypass the turbine, thus limiting intake pressure. You can see the action better on many newer turbo-chargers (ebay or google images) since the rod is external. As the spring ages, the limit drops, so some people tweak the spring to regain max power. There is also a trick to booger with that "intake feedback hose signal" by forming a controlled leak, but do at your own risk since melted pistons will ruin your day.
My point on fuel BTU energy vs max power is that you are limited in practice by how much smoke you want to put out. If a lower BTU fuel atomizes better to burn more complete, it is possible you could get more power from that fuel at your "personal smoke limit", assuming the injection pump doesn't limit the fuel flow. I almost never "floor" my diesels since I see a little haze if the sun is behind me. But, it is one way to get tail-gaters to back off.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#94
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And, hypothetically, a 5% loss of economy. |
#95
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...unless you are getting more complete combustion! Most of us have not noticed a significant drop in fuel economy using HPR.
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RenaissanceMan Labs: where the future is being made today. Garage: 2017 Chevy Colorado Diesel (nanny state emissions) 2005 Volvo S40 T5 AWD, 77k 1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg 1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg WARNING: this post may contain dangerous free thinking. |
#96
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One thing bothers me about Propel's Diesel HPR fuel. Most stations also sell their E85, and both have green price signs and use the same green fueling hose. I would never mix up, but I fear my son or wife filling up. Their thought process is "better use the cheaper one". I already dealt with my wife calling 6 yrs ago saying the engine sounded funny after she filled up my 1985 300D. I opened the cap, and it smelled like gas, and asked if she remembered to use the green pump. Wasn't sure. Must have been gas since I siphoned it and my minivan ran fine on it. I hate to imagine what horrors 85% ethanol might wrought. My son is slightly better. He once pointed to the air filter and asked "is that the engine?". Getting close.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#97
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The Propel station in Fresno has E-85 dispensed through a yellow nozzle. Poor planning at yours, and asking for a lawsuit. What about the residual diesel or E-85 in the line from the last guy?
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RenaissanceMan Labs: where the future is being made today. Garage: 2017 Chevy Colorado Diesel (nanny state emissions) 2005 Volvo S40 T5 AWD, 77k 1987 Mercedes-Benz 300D turbodiesel, 4 sp auto, 156k - 28.7 mpg 1996 Tracker 4x4, 2 door, 16v, 3 sp auto. 113k - 28.6 mpg WARNING: this post may contain dangerous free thinking. |
#98
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Are you sure? HPR is always green, e85 is always yellow.
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CENSORED due to not family friendly words |
#99
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Actually, I'm not sure. I'll check next time. I was probably thinking of the last station I used where they had only a green nozzle, but they probably didn't have E85 there.
I expect that clueless motorists make mistakes often. I am sure many have put E85 in a gas car not designed for it, tempted by the low price. One co-worker mistakenly filled a rental gas car w/ diesel in Spain, confused by the nomenclature there. I have read various claims about what running gas in a diesel engine would do. I would most fear damage to the IP from lack of lubrication, but some say "too powerful" and such, though diesel has more specific energy per volume.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
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#101
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Neste - Across These guys must've hired the worst publicist in the world since theres zero media coverage.
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CENSORED due to not family friendly words Last edited by tjts1; 06-26-2015 at 01:37 AM. |
#102
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That car would draw crowds. They need to bring it to auto shows and fairs. I'm not sure what the tie-in to high mileage is, since I don't think they can claim the fuel gives more mpg, though diesels in general can. If they followed in the draft of that big truck, they could get amazing mileage.
A related angle is that bio jet fuel is getting much publicity, with a passenger flight soon from LA to SF, and companies setting up plants to make it from waste farm products. The main green tie-in is that it doesn't produce net CO2. The waste would decompose to CO2 anyway, so why not burn it instead of fossil fuel from below. Same argument for WVO and HPR.
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1984 & 1985 CA 300D's 1964 & 65 Mopar's - Valiant, Dart, Newport 1996 & 2002 Chrysler minivans |
#103
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Quote:
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CENSORED due to not family friendly words |
#104
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Quote:
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'81 300SD |
#105
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I don't think what's happening with your engine is a lubricity issue. The pump probably just needs new seals.
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