"Boxer_4" (Boxer_4)
11/30/2015 at 20:45 • Filed to: None
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"Boxer_4" (Boxer_4)
11/30/2015 at 20:45 • Filed to: None | 3
| 15 |
Specific Output (that is, the amount of power produced relative to its displacement) is one of many metrics used to compare the performance of an engine. The holy grail, at least for naturally aspriated engines, is to produce over 100 horsepower per liter (100 hp/liter). I was reminded of the 1968 Subaru 360 Young SS, which produced 36 horsepower from 0.356 liters of displacement (Specific Output = 101.1 hp/liter).
I believe the 360 Young SS was the earliest production Subaru to reach this magic number, but I doubt it is the first production car ever to reach that number. I’m mainly curious about naturally aspirated cars for this, but any answer will do.
sm70- why not Duesenberg?
> Boxer_4
11/30/2015 at 20:51 |
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The 3.0 liter V12 in the Ferrari 250GTO produced 300hp in 1962.
TheHondaBro
> Boxer_4
11/30/2015 at 20:52 |
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In calculus, this would be considered as having infinite hp/liter.
dogisbadob
> Boxer_4
11/30/2015 at 21:02 |
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It has to be either a Honda or a wankel
crowmolly
> TheHondaBro
11/30/2015 at 21:05 |
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Isn’t it actually a division by zero?
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TheHondaBro
> crowmolly
11/30/2015 at 21:09 |
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Same thing.
Sam
> crowmolly
11/30/2015 at 21:17 |
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So it has undefined hp/liter, I guess?
Tekamul
> dogisbadob
11/30/2015 at 21:36 |
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Wankels don’t count. Because of the required rotation to complete a combustion cycle versus a reciprocating 4 stroke, you would have to double the wankels displacement for an apples-to-apples comparison
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TheHondaBro
> crowmolly
11/30/2015 at 21:56 |
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I guess I should clarify. Division by zero is asymptotic. As the denominator gets increasingly close to zero, the value skyrockets, and you’re left with an asymptote, or an x value that the function gets arbitrarily close to but never actually reaches.
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crowmolly
> TheHondaBro
11/30/2015 at 22:09 |
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I was setting you up for all the divide by zero jokes
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TheHondaBro
> crowmolly
11/30/2015 at 22:12 |
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Sorry, I just love math.
Berang
> Boxer_4
11/30/2015 at 22:17 |
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Mitsubishi and Daihatsu got even more power out of Kei car engines. In fact I think in its era Daihatsu got more power per liter than any other production car, something like 112ps per liter.
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crowmolly
> TheHondaBro
11/30/2015 at 22:19 |
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‘tis cool. I was a math minor in college.
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Boxer_4
> Berang
11/30/2015 at 22:50 |
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I believe you are referring to the Daihatsu ZM5, which produced 40ps (39.5hp) from 356 CC (111 hp/liter). It was introduced in July of 1970.
Mitsubishi is cloudier, but I believe you are referring to the 2G10-2 “Gold”. That produced 38ps (37.5hp) from 359 CC (104 hp/liter). I believe that specific version was introduced in July of 1969.
The Young SS had a 36 hp version of the EK32, which started production in November of 1968. It appears that Subaru hit the mark earlier, even if they were quickly surpassed.
uofime-2
> Boxer_4
12/01/2015 at 10:10 |
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Are we separating out the 2 stroke cars?
they’re kind of specific output( especially per weight) kings
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Boxer_4
> uofime-2
12/03/2015 at 11:49 |
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I didn’t think about that. We might as well.