Agriv8
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| posted on 5/10/06 at 10:27 AM |
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what were those scooters with the padals where you needed to pedal to get them going surly a contender.
regards
agriv8
Taller than your average Guy !
Management is like a tree of monkeys. - Those at the top look down and see a tree full of smiling faces. BUT Those at the bottom look up and see a
tree full of a*seholes .............
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NS Dev
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| posted on 5/10/06 at 11:00 AM |
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quote:
Originally posted by smart51
piaggio air cooled 50cc 4 stroke moped engine
2.9 lb ft, 4.4 BHP, 49.9cc = 0.255
4 stroke 50!!!!!!
yikes, think we may struggle to beat that one!!!!!
Retro RWD is the way forward...........automotive fabrication, car restoration, sheetmetal work, engine conversion
retro car restoration and tuning
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smart51
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| posted on 5/10/06 at 11:35 AM |
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Brushcut BC300 30cc strimmer
1.0 BHP @ 7000 RPM 1 lbft (est) 30.15ccc = 0.036
Or there's the Enya 09 R/C
0.16BHP, upto 14000 RPM, 1.62cc. £50 brand new. lbft x bhp/cc = about 0.0079
Don't laugh, that's 98 BHP per litre
[Edited on 5-10-2006 by smart51]
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StevieB
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| posted on 5/10/06 at 01:48 PM |
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My Volvo Diesel:
163BHP x 265 ib/ft / 2400cc = 18
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JoelP
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| posted on 5/10/06 at 02:22 PM |
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a better comparison would be to divide by the square of the displacement in litres.
Specific output is simply bhp over swept volume, which is a much better comparrison. By multiplying by torque (considering that Bhp and torque are
broadly similar), you are biasing the final figure towards power and away from volume. By squaring the volume you bring it back into a more linear
relationship.
The example above for the marine diesel highlights this problem very well, a result of 15000 or whatever is ridiculous to compare to results of 10 or
20 for car engines. If you squared the volume on it it would be much more compareable.
area under torque curve is revlbft/min
peak bhp in bhp
engine weight in kgs
i would suggest displacement is irrelevant, as weight and output are what count, along with how it delivers it, not how it gets it.
this would give us a final unit of revlbftW/min/kg
[Edited on 5/10/06 by JoelP]
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thomas4age
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| posted on 6/10/06 at 09:27 AM |
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ok here it goes
4age 20v
Multiply Power (in bhp or PS, they are close enough) by Torque (in lbft NOT Nm) then divide by swept volume in cc
161 x 134 / 1587 = 13.59
still not sure about the numbers though. looks like some importand data is missing.
grtz Thomas
If Lucas made guns, Wars wouldn't start either.
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Johnmor
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| posted on 6/10/06 at 09:06 PM |
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Good engine for locost
Being a fan of Italien Stuff
My mind went back to the Lancia Delta S4 rallycar.
Cant be 100% but i think:
2.0l turbo+supercharger 650bhp,400lbs torque.
600x400/2000= 120
Serious engine then!!!!
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