Quote:
Originally Posted by drifttec101
This is a strange post....
I've done some simple B.S. catcher number crunching:
given: 200 ft-lb torque, 134 cubic inches, @1300 RPM
HP=(torque*RPM)/(5252) HP=(200*1300)/(5252) = 49.505 HP
Specific Power = HP/Displacement 49.505 HP ~ 36915.87 W and 134 cubic inches ~ 2.195867 Liters
SP = 36.91587/2.195867 = 16 kW/L
What's important about specific power? Well, it shows B.S.... 16 kW/L is really low actually, race cars are upwards 80 kw/L. So I suppose this is well within the realm of possibility, but makes me wonder at what engine loading was this found. All engines make very little power at cruising speed/loading. This engine seems as if it was tested while at cruising speed... we need to see real dyno curves for the entire power band.
Furthermore, 6. something compression ratio is extremely low. Sounds like a tractor engine from the 1950's. The higher the compression ratio the more efficient the engine.
http://www.tpub.com/content/altfuels...4/28340011.htm
There's a graph to show that (very common graph, Google it if the link fails).
So, considering how low the compression ratio is the low specific power isn't really a surprise. But why would this indicate an extremely efficient revolutionary new engine design? What kind of fuel are you burning? What is the brake specific fuel consumption? What engine loading was tested at the dyno?
This all seems very fishy to me....
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Hello,
Good work you posting.
I repeat...no new engine design !!!
YUPPER...the numbers do come out wierd.
The engine is rated at 28-30 hsp...when made in 1957.
The best it did was at 2200 rpm's when the torque began to fall off quickly.
The engine never has been over hauled....compression tests at 110-115 psi
How am I able to get the same torque with less fuel at lower rpm's
Reduce fuel consumption at the same time???
Why would I ever want to rev past 2000 rpm much less to 5252 rpm?
the engine has never been tested at 5252 rpm...never will be.
The higher the compression ratio the more efficient the engine... rule of thumb...applies only if at each compression ratio the fuel has specifically controlled octane values...that is how they get the higher kw/l in "racing engines"
Are you aware that in the late 70's a couple of guys designed an atomizing mixer below the carburator...and found that fuel with 72 octane worked very well up...better than 87-92 octane... to 4000 rpm's...improved fuel efficienies ...which was about 45 mpg...almost eliminated the bad exhaust gases...and Ford did the testing...and improved the low rpm torque so that the gutless inline 6 cylinders would actually smoke the tires just with hard accelleration... no popping the clutch.
Had they changed the driveline slighly...they would have gotten better mpg.
After 4000 rpm's the A/F and thermodynamics got all wrong...and fell flat.
That was an 8.0-1 compression ratio engine.(?)
No turbo invloved either.
When you want to state compression ratios and efficiencies and include exhaust emissions with octane numbers...then the BS numbers matter.
Ford proved it to themselves it worked very well indeed...
then refused to put it into market because the oil refineries make mega bucks making you believe that the higher octane gasolines are what you have to have.
Higher octane rating equals slower burn times....that simple.
Lower compression equals lower cylinder temperatures...which do not make the harmful exhaust gases...in such quanities....that simple.
Robert